TX4400 UHF CB RADIO INSTRUCTION MANUAL TX4400 INSTRUCTION MANUAL PAGE 1

Transcription

1 TX4400 UHF CB RADIO INSTRUCTION MANUAL TX4400 INSTRUCTION MANUAL PAGE 1

2 TABLE OF CONTENTS GENERAL FEATURES BASIC OPERATION...4 Front Panel Controls Adjusting the Volume LCD Indicators....4 Squelch...5 Monitoring Function Selecting Channels Back Lighting... 5 Duplex Switch Priority Channel Signal Strength Meter....6 SCANNING Scan Groups Selecting a Scan Group....6 Programming Scan Channels...6 To Start Scanning...7 Scanning in the Open Scan Mode Ending the Scan...7 Using the Group Scan Mode Setting up the Group Scan....7 Scanning in the Group Scan Mode Ending the Scan Using the Group Scan as a Second Open Scan PROGRAMMING RECEIVE-ONLY CHANNELS... 8 Activating the 'Programming' Mode Programming the Receive-Only Channels... 9 Storing the Selected Frequency Editing your Programmed Receive Channels Disabling a Receive-Only Channel Scanning Receiving Selcalls on your Receive-Only Channels.. 10 CTCSS SELECTIVE CALLING What is Selcall Selcall Identification Number (Ident) Selcall Ident Names...10 The QUIET Mode (Q) Selcall Memories...10 Entering, Storing and Sending Selcalls Call Acknowledge Storing Selcall Idents...11 Recalling Selcall Idents from the Memory... 11, Recalling Fast Dial Memories...12 Naming your Selcall Idents Displaying ALPHA Names Entering and Storing a Selcall Name Receiving Selcalls Displaying the caller s Ident or Name...13 The Selcall Alert Cancelling the Selcall Alert Call Acknowledge Signal QUIET MODE Setting up the QUIET mode Tagging individual channels for QUIET operation Removing the QUIET Tag from Individual Channels. 13 Activating the QUIET Mode De-activating the QUIET Mode Receiving Signals in the QUIET Mode Scanning in the QUIET Mode...14 Receiving Signals while Scanning in the QUIET Mode.. 14 GROUP CALLING Programming and Sending Group Calls Sending the Selcall Ident Call Acknowledge in Group Mode Storing Group Call Idents Receiving Group Calls PAGER (TRANSPOND) MODE Overview Selecting the Paging Channel Setting the Paging Ident Monitoring a Single channel while in Page Mode Scanning in the Page Mode...16 Using Open Scan...16 Using Group Scan Using the QUIET Mode...16 Returning a Call in the PAGE Mode Deactivating the Page Mode CTCSS...17 Monitor Function Selecting the required CTCSS Tones...17 Enabling the CTCSS function on a channel...18 CTCSS Tone Frequency Chart...18 HOW TO DISABLE FEATURES REPEATERS INSTALLATION Fitting the microphone...20 PAGE 2 INSTRUCTION MANUAL TX4400

3 Rear microphone connection DC Power Connection High Voltage Warning Antenna Connection SPECIFICATIONS Warranty THE FOLLOWING ITEMS ARE INCLUDED WITH YOUR TX4400 TX4400 Radio Mounting Cradle Instruction Manual MC509B Microphone Microphone Clip DC Lead Screw Pack If any items are missing or damaged, please contact your retailer or place of purchase. GENERAL Your GME TX4400 radio is Australian designed and built and is one of the most advanced UHF Citizen Band radios available. The TX4400 combines the very latest in electronic hardware with the most up-to-date computer aided design and manufacturing techniques to produce an extremely versatile mobile radio with outstanding specifications and performance. The TX4400's DIN sized case allows it to be conveniently installed into a dashboard or console and its strong diecast aluminium chassis makes it the most robust radio of its kind. With just three rotary controls and five touch keys, the TX4400's extensive features are easy to operate. FEATURES Microprocessor Controlled Frequency Synthesiser: Allows user programmable control of scanning, Selcall, CTCSS, channel memories and selected feature options. Permanent Memory: Retains all user settings in nonvolatile memory even when the power has been removed. Programmable Scan Function: Scans up to 40 user programmable channels with both Group and Open scan functions available. User Programmable Receive-Only Channels: Use the TX4400's front panel controls to program up to 20 of your own receive-only channels in the MHz frequency range. In-Built CTCSS: User selectable Continuous Tone Coded Squelch System provides quiet channel operation (can be enabled or disabled on individual channels). In-Built Selcall: Selective Calling of individuals or groups with four or five digit ANI and fully user-adjustable 5 tone transmitted Selcall Ident. Also allows alphanumeric naming of up to 10 Idents for easier caller identification. Front Facing Speaker: Projects the sound forward for greater clarity. Individually Programmable DUPLEX function: User selectable for only those individual channels in your area that have repeaters, leaving the others free for use as extra simplex channels. Priority Channel: A user programmable priority channel feature allows your working or local repeater channel to be instantly recalled at the press of a button. Large High Contrast Liquid Crystal Display: Fully detailed LCD with large characters provides a visual indication of the selected channel and all selected functions at a glance. LED backlit for viewing at night with DIM function. Quiet Mode: Selectable on individual channels, the Quiet mode prevents incoming signals from being heard on selected channels unless preceded by your Selcall code. Unique Page (Transpond) mode: Allows you to transfer an incoming Selcall to another radio if your radio is unattended. Feature Disabling Function: Allows Scanning, Squelch, Duplex, Priority, Channel selection and CTCSS features to be enabled or disabled to make the radio simpler to operate. Overvoltage Protection: Special overvoltage detection circuitry protects the radio and warns of excessive voltage conditions by flashing the display. Microphone Connection: Optional rear connecting microphone facility allows for flexible installation. 20 Additional Channels: Room for an additional 20 Dealer programmable 'receive-only' channels. Australian Made: The TX4400 has been totally designed and manufactured in Gladesville NSW to meet the demanding needs of the Australian community. TX4400 INSTRUCTION MANUAL PAGE 3

4 BASIC OPERATION FRONT PANEL CONTROLS Rotate for Volume Rotate for Channel Selection Push for Priority Channel Display Rotate for Squelch Press for Monitor Function Press first to access Functions SCAN Selector. Function: DIM OPEN/GROUP Scan. Function: PAGE Duplex Mode. Function: ALPHA QUIET Mode. Function: SILENT ADJUSTING THE VOLUME Rotate the Volume control clockwise past the click to turn the TX4400 ON. Adjust the volume control for a comfortable listening level. If no sound is heard, rotate the Squelch knob fully counter-clockwise to temporarily un-mute the radio. You can now adjust the volume by listening to the receiver's background noise. When finished, rotate the Squelch knob clockwise again to remute the radio LCD INDICATORS QUIET Mode Selcall Call Mode Receive Indicator Transmit Indicator QUIET Tag Channel Memory Indicator Channel Display Selcall memory Location Scan Indicator Selcall Ident Display ALPHA name Display Duplex Indicator CTCSS Indicator PAGE 4 INSTRUCTION MANUAL TX4400

5 SQUELCH MON The Squelch is used to eliminate any annoying background noise when there are no signals present. The TX4400 features a continuously variable Squelch control system allowing the user to set the Squelch for optimum performance. To adjust the Squelch, first rotate the Squelch control fully counter-clockwise until the background noise is heard and the BUSY indicator is displayed on the LCD. Now advance the Squelch control slowly clockwise until the noise is just extinguished and the BUSY indicator disappears. At this point the receiver will remain quiet while no signals are present, but an incoming signal will override the Squelch and be heard in the speaker. As the Squelch control is advanced further clockwise the Squelch action is progressively increased and stronger incoming signals are needed to overcome it. Note: If an incoming signal is very weak and is close to the minimum squelch level, it may become broken or chopped by the squelch action. To prevent this, simply turn the Squelch control fully counter-clockwise to open the squelch, which will allow the signal to be heard clearly. MONITORING FUNCTION (MON) When using CTCSS, press the Squelch knob to temporarily open the Squelch to allow you to listen for signals on the channel. For a full description of the MON function refer to the CTCSS section. SELECTING CHANNELS Select the required channel by rotating the channel selector knob. Rotate the knob clockwise to select higher channels and counter-clockwise to select lower channels. The selected channel is displayed in large numbers on the LCD. BACK LIGHTING The Liquid Crystal Display and function keys are backlit for easy viewing at night or in low light situations. The LED back lighting is on at all times while the TX4400 is turned on. To DIM the backlighting, briefly press the F key, followed by the DIM key. Repeat the sequence to restore the backlighting to full brightness. DUPLEX SWITCH Duplex operation allows the TX4400 to transmit on a different frequency to that which it receives. This allows operation through any repeater stations in your area. Repeaters automatically re-transmit your signal over a wider area, providing greatly increased range. The Duplex function operates only on channels 1-8. When Duplex is selected on one of these channels, the TX4400 receives on that channel but actually transmits 30 channels higher. Channel Selected Receive Channel Transmit Channel The TX4400 allows you to select duplex operation on individual channels. This is particularly useful in country areas where there may only be one or two repeaters. The unused repeater channels can then be used for normal simplex or direct radio-to-radio communications. To select Duplex on individual channels: 1. Select the required channel Briefly press the DUP key. DUP will appear on the display accompanied by a high beep. To remove Duplex from a channel: 1. Select the required channel 1-8. DUP will be visible on the display. 2. Briefly press the DUP key. DUP will disappear from the display accompanied by a low beep. TX4400 INSTRUCTION MANUAL PAGE 5

6 PRIORITY Channel The Priority Channel feature allows you to store one of the 40 Channels in the TX4400 as a priority Channel that can be instantly recalled at the press of a key. This can be used to provide instant access to your working Channel or your Local Repeater Channel. To Store Priority Channel: 1. Select the required Channel. 2. Press and hold the Channel Knob. The Channel display will flash for a moment then a high beep will be heard as the selected Channel is stored. To recall the Priority Channel: Briefly press the Channel Knob. The TX4400 will immediately switch to the Priority Channel accompanied by a high beep. SIGNAL STRENGTH METER The TX4400 has a digital signal strength meter that is displayed on the LCD. When in the normal receive mode (scan not selected) the received signal strength is displayed as numbers from 0 to 9 (with 9 being the strongest) on the lower right of the display. SCANNING The TX4400 is provided with a SCAN function to allow groups of user programmable Channels to be scanned for signals. Channels can be scanned at up to 10 Channels per second. When a signal is found, scanning will pause on that Channel to allow the signal to be heard, then resume scanning when the Channel is clear again. SCAN GROUPS The TX4400 features two scan groups - Open Scan and Group Scan. Open Scan allows any of the fitted Channels to be scanned for activity in an ascending sequence (i.e. from the lowest Channel to the highest). If a busy Channel is found, scanning will pause to allow the signal to be heard. Once the Channel has been clear for 5 seconds, scanning will resume automatically. Group Scan also allows any of the fitted Channels to be scanned for activity in an ascending sequence, but in addition, it also inserts your Priority Channel into the scan sequence. This means that your Priority Channel will be monitored regularly while scanning to ensure that no calls are missed. Any signals received on your Priority Channel will have priority over any signals received on the other Channels. Example: Scanning Channels 1-8 with Priority Channel 20 in Group Scan SELECTING A SCAN GROUP The current scan group is shown on the display as OS for Open Scan or GS for Group Scan. Open scan mode Group Scan Mode To change the selected scan group, briefly press the OS/GS key. A beep will be heard and the display will change to reflect the scan group you have selected. PROGRAMMING SCAN ChannelS Your TX4400 is supplied with all 40 UHF CB Channels programmed into the Open Scan memory. Any Channels not required can be removed as necessary. The Group Scan memory is empty by default and you will need to add Channels to it before use. To add or remove Channels from either scan memory: 1. Check that the radio is not already scanning. If it is, briefly press the SCAN key to cancel the scan function. 2. Select the required scan group by pressing the OS/GS key. 3. Select the required Channel by rotating the Channel selector Example: Scanning Channels 1-8 in Open Scan Channel is in Memory PAGE 6 INSTRUCTION MANUAL TX4400

7 I f M is visible to right of the display, the selected Channel is presently in the scan memory. It can be removed by holding the SCAN key in for a few seconds until a low beep is heard. M will then disappear indicating the Channel is no longer in memory. If M is not visible to right of the display, then the selected Channel is not in the memory. To add it, hold the SCAN key in for a few seconds until a high beep is heard. M will now appear to the right of the display. 4. Repeat step 3 to add or remove other Channels in the scan memory. TO START SCANNING To scan in the selected scan mode, briefly press the SCAN key. A high beep will be heard, SCAN will appear in the display and the radio will begin scanning. Note: If there are less than 2 Channels programmed in the scan memory in Open Scan or one Channel in Group Scan when you press the SCAN key, a long low beep will be heard and the command will be ignored. SCANNING IN THE OPEN SCAN MODE If a busy Channel is found, scanning will pause on that Channel to allow the signal to be heard and will remain there for as long as the Channel remains busy. Once the Channel has been clear for 5 seconds, scanning will resume automatically. If your radio pauses on a busy Channel and you don't wish to listen to that conversation, briefly press the CALL button on top of the microphone. The radio will skip over that Channel and resume scanning from the next Channel in the sequence. To transmit while paused on a busy Channel, simply press the Push-To-Talk (PTT) button on the microphone. The SCAN mode will be put on hold and the radio will stay on that Channel. You can now converse on that Channel in the usual way. When you have finished your conversation, briefly press the CALL button to resume scanning. If your radio is paused on a busy Channel and you wish to remain there, briefly press the SCAN key. The radio will exit the Scan mode and remain on the busy Channel. If your radio is scanning and you need to use your Priority Channel (for an urgent call or an emergency), briefly press the Channel knob. The Scan mode will be cancelled and the radio will jump straight to the Priority Channel. Note: In the Open Scan mode your TX4400 will not allow you to transmit while it is scanning. If the PTT button is pressed while scanning, the radio will give a low beep and will ignore the command. Your radio will only transmit while it is paused on a busy Channel. ENDING THE SCAN To stop scanning, briefly press the SCAN key. A low beep will be heard and SCAN will disappear from the display. As long as the radio was not on a busy Channel, it will return to the last Channel you selected, otherwise it will stay on the busy Channel. USING THE GROUP SCAN MODE Group Scan allows you to transmit and receive normally on your priority (working) Channel, but between breaks in the conversation, the TX4400 will scan and listen to several other Channels. The receiver will continue to scan the other Channels ONLY WHILE THERE ARE NO SIGNALS ON THE PRIORITY Channel. If a signal appears on the priority Channel it will override any signals being received on any of the other Channels. In addition, if you press the PTT switch on the microphone at any time, the radio will transmit on the priority Channel in the usual way. SETTING UP THE GROUP SCAN To setup your radio for Group Scan: 1. Select the Group Scan mode by pressing the OS/GS key so that GS is displayed. 2. Program your Priority Channel memory with your preferred working Channel. 3. Program the required other Channels into your Group Scan memory. SCANNING IN THE GROUP SCAN MODE To scan in the Group Scan mode, briefly press the SCAN key. A high beep will be heard, SCAN will appear in the display and the radio will begin scanning. Note: If there are no Channels programmed in the Group Scan memory when you press the SCAN key, a low beep will be heard and the command will be ignored. When scanning, the TX4400 scans all the Channels programmed into the Group Scan memory, with the priority Channel being scanned after every fourth Channel. If a signal is heard on a scanned Channel, scanning will pause on that Channel and remain there for as long as the Channel is busy, and for 5 seconds after the Channel has cleared, as long as there are no signals on the priority Channel. During this time the receiver will continue to check the priority Channel for signals every 2 seconds, resulting in a series of small 'breaks' in the TX4400 INSTRUCTION MANUAL PAGE 7

8 reception of the 'paused' Channel. If no signals are heard after 5 seconds, the radio will resume scanning. If a signal appears on the priority Channel at any time (even when paused on a scan Channel) the receiver will switch straight to the priority Channel and will stay there for as long as the Channel is busy. During this time you can transmit on the priority Channel in the usual way. Once there has been no activity on the priority Channel for 5 seconds, the radio will resume scanning the other Channels. To talk on the priority (working) Channel AT ANY TIME, simply press the PTT switch on the microphone. The radio will switch straight to the priority Channel. When you have finished your conversation and there has been no further activity on the priority Channel for 5 seconds, the radio will resume scanning the other Channels. If your radio pauses on a busy Channel and you don't wish to listen to that conversation, briefly press the CALL button on top of the microphone. The radio will skip over that Channel and resume scanning from the next Channel in the sequence. If your radio is paused on a busy Channel and you wish to remain there, briefly press the SCAN key. The radio will exit the Scan mode and remain on the busy Channel. Note that the radio will no longer be monitoring the Priority Channel (unless it is the busy Channel). To resume scanning, press the SCAN key again. To go directly to the Priority Channel, briefly press the Channel knob. The radio will exit the Scan function. ENDING THE SCAN To cancel the Group Scan mode, briefly press the SCAN key. A low beep will be heard and SCAN will disappear from the display. If the radio was on a busy Channel it will remain on that Channel, otherwise it will return to the priority Channel. USING THE GROUP SCAN AS A SECOND OPEN SCAN There may be applications where you have no need for the priority Channel and would prefer to have two Open Scan modes with separate Channel groups in each. This would allow you to scan either Channel group without the interruption caused by monitoring a priority Channel. Your TX4400 can be Dealer programmed to convert the Group Scan function into a second Open Scan mode. If you would prefer this feature over the present Group Scan option you should contact your GME Dealer to arrange for this feature to be enabled. When the second Open Scan mode is enabled, the original Open Scan mode becomes Scan 1 while the new additional Open Scan mode becomes Scan 2. To select the required scan mode briefly press the OS/GS key. S1 is displayed for Scan 1 and S2 for Scan 2. The two Open Scan modes are identical in operation. To program and operate each Open Scan mode refer to the section earlier on Open Scan Open Scan 1 Open Scan 2 Note: Enabling or disabling the second Open Scan mode is not a user selectable option. Once enabled by your Dealer, the additional Open Scan mode becomes a permanent part of the TX4400 s features and replaces the standard Group Scan function. If you find later that you need the Group Scan function re-enabled, you will need to return your TX4400 to your Dealer. PROGRAMMING RECEIVE-ONLY CHANNELS Your TX4400 has provision for an extra 20 Receive-Only Channels, in addition to the standard 40 UHF CB Channels provided. These extra Channels can be user programmed into Channel positions 41 through 60, within the frequency range of 465 to 485 MHz. Frequencies are selected in 25 khz steps. Note that the standard CB Channels 1 through 40 are fixed and cannot be altered. Activating the 'Programming' Mode Your TX4400 is supplied from the factory with the Receive- Only Channels deactivated. You can activate and program them yourself as follows: 1. Turn the radio OFF. 2. Press and hold the Channel selector while turning the radio ON. 3. Release the Channel selector. The radio is now in 'Programming' Mode. Rotate the Channel selector clockwise past Channel 40. You will now find that you can select additional Channel numbers 41 through 60. Initially, these Channels will have no frequencies installed in them and are in effect, turned OFF. Each individual Channel will need to be turned ON and programmed with the receive frequency of your choice. PAGE 8 INSTRUCTION MANUAL TX4400

9 Programming the Receive-Only Channels Note: When programming, rotate the Channel selector SLOWLY. If you rotate the Channel selector too quickly, the internal counter will not be able to keep up with you and the frequency will not advance. 1. Select the Channel number that you wish to program (Channels 41 to 60). 2. Press and HOLD the Channel selector until the radio beeps (about 2 seconds). 'OFF' will appear to the right of the Channel number indicating there is no frequency installed. 3. SLOWLY rotate the Channel selector CLOCKWISE one click to activate frequency programming. 'OFF' will disappear and '46500' will be displayed indicating a frequency of MHz (the lower end of the radio's frequency range). Note: Because the display is only able to show the first 5 digits of the frequency, the last 'khz' digit is not displayed. However, since the frequency can only be selected in 25 khz steps, it is easy to 'guess' the actual frequency since the missing digit will always alternate between 0 and 5 khz. e.g. Display Frequency MHz MHz MHz MHz MHz 4. Rotate the Channel selector SLOWLY in a clockwise or counter-clockwise direction to set the desired frequency. Each click of the Channel selector will advance or reduce the frequency by 25 khz. The maximum allowable frequency you can select is MHz. Note: The radio is able to receive signals on the displayed frequency the instant you select it. This feature allows you to manually tune through the frequencies looking for signals or active Channels in your area. 5. To quickly step through the MHz, briefly press the Channel selector. A high beep will be heard. Now rotating the Channel selector will adjust only the MHz section of the frequency. 6. To return to normal 25 khz frequency steps press the Channel selector again. A low beep will be heard. Storing the selected Frequency 7. Once the required frequency is displayed, press and HOLD the Channel selector for about 1.5 seconds. The frequency will flash, then the radio will beep indicating the frequency has been stored. To program other frequencies, repeat steps 1 to 7 above. Once you have programmed the required Channels, switch the radio OFF to exit the programming mode. Now when you switch the radio ON, you will be able to select the usual 40 CB Channels plus the additional Channels you have programmed. Note: There is no provision to transmit on the Receive-Only Channels. If the PTT switch is pressed on a Receive-Only Channel, the radio will emit a low beep. Editing your Programmed Receive Channels The Receive-Only Channels you have programmed can be edited at any time. You do not need to re-enter the programming mode. To edit a Receive-Only Channel: 1. Select the required Channel. 2. Press and hold the Channel selector until the radio beeps (about 2 seconds). The frequency stored in that Channel will be displayed. 3. Slowly rotate the Channel selector to select a new frequency. 4. To store the new frequency, press and hold the Channel selector until the radio beeps. Disabling a Receive-Only Channel If you no longer wish to display a Receive-Only Channel, you can switch it OFF so the Channel number no longer appears when selecting Channels. 1. Select the receive-only Channel that you wish to disable. 2. Press and hold the Channel selector until the radio beeps. The frequency will be displayed. 3. Briefly press the Channel selector to select the MHz frequency stepping mode. This will allow faster frequency changing. 4. Slowly rotate the Channel selector counter clockwise to reduce the frequency until OFF is displayed. 5. Press and hold the Channel selector to store the new setting. Scanning The additional receive Channels can be programmed into your scan groups in the same way as your normal CB Channels. Simply select the required receive-only Channel, select the required scan group (Open or Group Scan), then TX4400 INSTRUCTION MANUAL PAGE 9

10 press and hold the SCAN button until the radio beeps. 'M will be displayed on that Channel to indicate that it is in the scan memory. For more details, see the section on 'Scanning' in this manual. Receiving Selcalls on your Receive-Only Channels If your TX4400 receives its Selcall code on a Receive-Only Channel, it will respond in the usual way, except that it cannot automatically transmit two quick beeps back to the caller since there is no transmit frequency. For more details, see the section on 'Selcall' in this manual. Using the PAGE function with your Receive-Only Channels. You can monitor Receive-Only Channels with the Page function in the same way as you can with CB Channels. If your Selcall is received on the Receive-Only Channel your radio will page you the same as it would if the call was received on a normal CB Channel, except that it cannot respond to the caller with two quick beeps since there is no transmit frequency. For more details, see the 'Page Mode' section on in this manual. CTCSS There is no provision for CTCSS operation on the Receive- Only Channels. SELECTIVE CALLING WHAT IS SELCALL Your TX4400 has a Selective Calling (Selcall) system that operates like a telephone. Your radio has been programmed with its own unique Selcall Identification number. When this number is called by another radio, your TX4400 will beep to alert you. If you do not want to hear any other activity while waiting on a Channel, you can push the QUIET key. The radio will then remain quiet to all incoming signals until your number is called. Your radio allows you to store up to ten of your most frequently called numbers in memory. Each number can be labelled with a 5-letter name for easy identification. SELCALL IDENTIFICATION NUMBER (Ident) Your TX4400 is factory programmed with its own unique Ident. This number identifies your radio from others in your area. You will need to make your Ident known to anyone who may need to call you with Selcall. Whenever your TX4400 hears a Selcall signal, it compares the incoming Ident with it s own. If the two Idents match, the radio knows it is being called and sounds an alarm to alert you to the call. The Selcall Ident for your radio is printed on the label on the rear panel and is also stored in Selcall memory 12 (see section below on programming the Selcall memories). The Ident is the last 5 digits of the radio's serial number. Note: The Selcall Ident is also displayed to the right of the Channel number for one second each time the radio is turned on. Although your radio's Selcall Ident is preprogrammed at the factory, you can arrange to have your Dealer change it if required. SELCALL IDENT NAMES The TX4400 allows you to name all 10 of the Selcall Idents stored in memory using a 5 character word. The name can then be stored in memory with the Ident making it easier to identify whose Ident you are recalling from the memory. In addition, if an incoming Selcall matches one of the Idents stored in the memory, its name can be displayed to make it easier for you to identify the caller. THE QUIET MODE (Q) Your TX4400 can be set to listen on a busy Channel but not allow any sound to reach the speaker UNLESS it receives its own Selcall Ident. In this way, your radio can monitor a busy Channel without disturbing you, but still let you know when you are being called. The QUIET mode overrides the normal Squelch system to ensure that the radio remains quiet even when the Channel is busy or the Squelch is opened with the Squelch control. When QUIET is set, you may see 'BUSY' appear on the display and signal strengths appear on the display indicating the Channel is being used. However, unless someone transmits your Selcall Ident, nothing will be heard in the speaker. The QUIET mode can be set to work on specific Channels i.e. some Channels can be set to remain Quiet while others can remain Open to all incoming signals. When a signal containing your Selcall Ident is received, the QUIET mode is deactivated and an alarm sounds to alert you to the call. You can then converse normally on the Channel. Note: Setting the QUIET mode is not mandatory. You can still use Selcall on any Channel whether the QUIET mode is set or not. SELCALL MEMORIES Your TX4400 is fitted with 13 Selcall Ident memories. Memory locations 1-10 are available for normal use and can be programmed with your favourite Selcall Idents and Alpha Names. Memory locations are reserved for use by the radio as follows: PAGE 10 INSTRUCTION MANUAL TX4400

11 Memory location 11 holds the Selcall Ident for the Pager function. See the Page Mode section for more details on this feature. When in ALPHA mode, this memory displays PAGER. Memory location 12 holds the last-sent or received Selcall Ident. Whenever you send or receive a Selcall, the Ident is automatically stored in this location allowing you to easily recall it and resend it. When in ALPHA mode, this memory displays LAST. Memory location 13 contains the radio s own Selcall Ident. If you need to give your Selcall Ident to someone but can t remember it, you can recall it from this location. When in ALPHA mode, this memory displays RADIO. The memories can be viewed by briefly pressing the CALL button on the microphone, then rotating the Channel switch. ENTERING, STORING AND SENDING SELCALLS Use the following procedure to enter and send a Selcall. 1. Press the CALL button on the microphone. CALL TO is displayed, along with a memory location on the left and an associated 5 digit Selcall Ident on the lower right. Memory Location 2. Enter the required Selcall ident as follows: CALL TO Mode selected Selcall Ident (a) Briefly press the Channel knob. The right-hand digit of the Selcall Ident will flash. (b) Rotate the Channel knob to select the required number in the flashing digit position. (c) Briefly press the Channel knob again to select the next digit position. (d) Repeat steps (b) and (c) to enter all 5 digits as required. 3. Now press and hold the CALL button to send the Ident. CALL ACKNOWLEDGE If your Selcall transmission is successful, the radio you called should respond with a 'call acknowledge' signal - usually two quick beeps. This will confirm to you that the radio you called is now alerting its user to your signal. STORING SELCALL IDENTS Your TX4400 is fitted with 10 user programmable Selcall Ident memories, allowing you to store up to 10 frequently used Selcall Idents. The memories are accessed by pressing the CALL button on the microphone then rotating the Channel switch. Note: Memory locations 1-4 are Fast Dial memories. Once programmed they can be quickly recalled using the front panel keys. If you wish to make use of this feature, you should program your four most frequently used Selcall idents into the first four memory locations. For details on using these Fast Dial keys, see section below on Recalling Fast Dial Memories. To Store a Selcall Ident in memory 1. Press the CALL button on the microphone to select the CALL TO mode. CALL TO is displayed along with a memory location number on the left and an associated 5 digit Selcall Ident on the right. 2. Rotate the Channel switch to select the Selcall memory that you wish to programme (only locations 1-10 are available for user programming). Note: If the radio displays letters instead of numbers in the Selcall Ident position, your radio is in ALPHA mode. To switch back to Ident mode, briefly press the F key then the ALPHA key. 3. With the required memory location displayed, enter the Selcall ident as follows: (a) Briefly press the Channel knob. The right-hand digit of the Selcall Ident will flash. (b) Rotate the Channel knob to select the required number in the flashing digit position. (c) Briefly press the Channel knob again to select the next digit position. (d) Repeat steps (b) and (c) to program all 5 digits as required. 3. Now press and hold the Channel knob. The Selcall Ident will flash for a few seconds, then the radio will beep as the Ident is stored. RECALLING SELCALL IDENTS FROM THE MEMORY 1. Briefly press the CALL button on the microphone to select the CALL TO mode. 2. Rotate the Channel knob to select the required memory location. The Selcall ident stored in that memory will be displayed. 3. When the required Selcall Memory is displayed, press and hold the CALL button to send the Ident. TX4400 INSTRUCTION MANUAL PAGE 11

12 RECALLING FAST DIAL MEMORIES Memory locations 1-4 are Fast Dial memories. Once programmed they can be quickly recalled using the front panel keys. To make use of this feature, you should program your four most frequently used Selcall idents into the first four memory locations. To recall an Ident from the Fast Dial memories 1. Briefly press the CALL button on the microphone to select the CALL TO mode. 2. Press one of the four front panel keys shown below. 3. When the required Selcall Memory is displayed, press and hold the CALL button to send the Ident. NAMING YOUR SELCALL IDENTS The TX4400 allows you to name each Selcall Ident using a 5 character ALPHA name. The name is stored in memory along with the Ident making it easier to identify whose Ident you are recalling from the memory. If an incoming Selcall matches one of those in your radio's memory, the name can be displayed instead of the Selcall Ident. Displaying ALPHA Names To display the Selcall's ALPHA Name, you must have the the F key followed by the ALPHA key to select the ALPHA mode (a high beep indicates the ALPHA mode is selected). 2. Rotate the Channel switch to select the Selcall memory that you wish to programme (only locations 1-10 are available for user programming). Memory Location 3. With the required memory location displayed, enter the required ALPHA name as follows: (a) Briefly press the Channel knob. The right-hand character of the ALPHA name will flash. (b) Rotate the Channel knob to select the required character in the flashing character position. The following characters are available: * A B C D E F G H I J K L M N O P Q R S T U V W X Y Z <SPACE> ALPHA Name Memory 1 Memory 2 Memory 3 Memory 4 radio's ALPHA display mode selected. To select the ALPHA display mode, briefly press the F key followed by the ALPHA key. The TX4400 will give a HIGH beep. To return to the IDENT display mode repeat the key press sequence. A LOW beep will confirm the IDENT display mode is selected. Note: The normal Channel display will give no indication of which display mode is selected. Only when displaying Idents will it become obvious which mode is presently selected. ENTERING AND STORING A SELCALL NAME Before adding an ALPHA Name to a Selcall Ident, you should first store the required Ident in memory as described above under STORING SELCALL IDENTS. 1. Briefly press the CALL button on the microphone. The CALL TO mode will be selected and the last-sent Selcall memory location will be displayed. The large numbers to the left show the memory number while the five characters under the 'CALL TO ' icon represent the ALPHA name associated with the Selcall stored in that memory. If the Selcall Ident is visible, briefly press c) Briefly press the Channel knob again to select the next character position. d) Repeat steps (b) and (c) to program all 5 characters as required. 4. Now press and hold the Channel knob. The ALPHA name will flash for a few seconds, then the radio will beep as the name is stored. Repeat the procedure to add ALPHA names to any other Selcall Idents stored in memory. To exit the 'CALL TO' mode, briefly press the CALL button. The radio will return to normal operation. The radio can be left in the ALPHA display mode so that an incoming Selcall matching one of those in the radio's memory will display the name associated with that Selcall Ident instead of the Ident itself. Any Selcall's not matching those in the memory will display the normal Ident in the usual way. RECEIVING SELCALLS When your TX4400 receives its own Selcall number, it will beep to alert you to the call. In addition, it will cancel the QUIET mode (if selected) and display the Ident or ALPHA name of the caller. PAGE 12 INSTRUCTION MANUAL TX4400

13 Displaying the Caller s Ident or Name Whenever your TX4400 receives it s own Selcall Ident, the words CALL FROM' will appear on the display along with the callers Selcall Ident or ALPHA name to inform you of the identity of the person calling. To switch between Selcall Idents and ALPHA Names briefly press the F key followed by the ALPHA key. The Selcall Alert When your TX4400 receives it s Selcall Ident, an alarm will sound in the speaker to alert you to the call. Initially the alarm will beep urgently at 2 beeps per second for around 10 seconds then slow to around 1 beep every 3 seconds if the call is not answered. It will then continue to beep indefinitely until you cancel it. Cancelling the Selcall Alert Pressing just about any key on the TX4400 will cancel the Selcall Alarm. However, the following are the recommended methods. If you want to cancel the Alarm and listen on the channel: Briefly press the QUIET key. The alarm will stop beeping and the channel will remain open to any incoming signals. If you want to Cancel the Alarm and talk on the channel: Press the PTT switch on the microphone and talk in the usual way. The alarm will be cancelled and the channel will be open for normal communication. If you want to Recall the Callers Ident and return the call: Briefly press the CALL button on the microphone. The radio will enter the 'CALL TO' mode and will insert the callers Ident or ALPHA Name ready for sending. Now simply press and hold the CALL button for a few seconds until the radio beeps. The Selcall will be sent to the caller. Call Acknowledge Signal When your TX4400 receives its own Selcall Ident, it automatically responds by transmitting an 'acknowledge' signal back to the caller. This informs the caller that their Selcall transmission has been successful and that your radio is alerting you to their call. The 'acknowledge' signal is heard at the callers end as two quick beeps. QUIET MODE The QUIET mode mutes the TX4400's receiver to prevent any incoming signals from being heard in the speaker until your Selcall Ident is received. In this way you can monitor a busy channel for personal calls without being disturbed by unwanted signals. If your Selcall Ident is received, the QUIET mode is then cancelled and all incoming signals are heard in the speaker. SETTING UP THE QUIET MODE To setup the QUIET mode you must first 'tag' the channels that you want to stay Quiet, then activate the QUIET mode. Once the QUIET mode is activated, the channels you have tagged will remain Quiet to all incoming signals unless your Selcall Ident is received. Channels not tagged will remain open to all signals and will operate normally. Tagging individual channels for QUIET operation 1. Select the required channel using the Channel switch. 2. Press and HOLD the QUIET key until a high beep is heard. Q will appear on the far right of the display indicating the selected channel is now tagged for Quiet operation. Indicates QUIET mode is Active Removing the QUIET Tag from Individual Channels 1. Select a channel that has been tagged for Quiet operation. Q will be displayed. 2. Now press and hold the QUIET key until a low beep is heard. Q will disappear indicating this channel is no longer tagged for Quiet operation. Activating the QUIET Mode Indicates selected Channel is TAGGED for QUIET Operation 1. First, select a channel that has been tagged for Quiet operation (you cannot activate the Quiet mode unless you have selected a 'tagged' channel). Q will be displayed 2. Now briefly press the QUIET key. 'QUIET' will appear at the top of the display. Now all channels tagged for Quiet operation will be operating in the Quiet Mode. TX4400 INSTRUCTION MANUAL PAGE 13

14 Note: You can test this by opening the squelch and selecting various channels with the channel switch. The radio will remain quiet on those channels that are set for Quiet operation while normal channels will emit the usual background noise. De-activating the QUIET Mode 1. Select any channel that has been tagged for Quiet operation. Q and 'QUIET' will be displayed. 2. Briefly press the QUIET key. 'QUIET' will disappear from the top of the display and all channels tagged for Quiet operation will now operate normally again. Receiving Signals in the QUIET Mode If a normal signal is received on a QUIET channel, the channel will appear busy (the 'BUSY' indicator will be visible) but no sound will be heard from the speaker. This means you will not be disturbed by the signal. If a normal signal is received on an Open channel (one that is not tagged with Q ) the signal will be heard in the usual way. If a signal containing your Selcall Ident is received on any channel - Open or QUIET - the QUIET mode will be cancelled and the alarm will beep to alert you to the call. In addition, the callers Ident or ALPHA Name will be displayed. All channels will now be open for normal transmission and reception. SCANNING IN THE QUIET MODE The TX4400 will allow you to scan while the QUIET mode is active. Using this feature you can monitor a group of Quiet channels or a combination of Quiet and Open channels. To Scan in the QUIET Mode: 1. Briefly press the OS/GS key to select the required Scan group. 2. Select the channels you wish to scan and store them in the Scan memory. 3. From those channels, select the ones you wish to remain Quiet and tag each one for QUIET operation. 4. Press the SCAN key. The radio will begin scanning and 'SCAN' will be displayed. 5. Now, briefly press the QUIET key to activate the QUIET Mode. The radio will then be scanning in the QUIET mode. Receiving Signals while Scanning in the QUIET Mode If a normal signal is received on an open channel, scanning will pause while the channel is busy and will resume scanning 5 seconds after the channel becomes clear. (If you were scanning in Group Scan mode, the radio may switch between the open channel and the Priority channel - this is normal). If a normal signal is received on a Quiet channel but your Selcall Ident is not detected, the signal will be ignored and scanning will continue. If a signal containing your Selcall Ident is received on any channel - Open or Quiet - both scanning and QUIET modes will be cancelled and the receiver will stay on that channel. In addition, the alarm will beep to alert you to the call and the callers Ident or ALPHA Name will be displayed. The channel will now be open for normal transmission and reception. Note: To ensure reliable Selcall detection when scanning, it is recommended that you restrict the number of channels in the Scan group to 5 or less. GROUP CALLING The TX4400's Selcall system includes a Group Call function which allows you to call up to 10 radios simultaneously. This can be useful in an emergency situation where you may need to transmit a message to a number of radios in your group. The Group Call function works by allowing you to enter a special 'group code' into the last digit position of the Selcall Ident you are sending. The 'group code' appears as an 'A' when displayed in the radio. When this 'group code' is received, it substitutes for any other number in the last digit position. As long as the first 4 digits of the Selcall you are sending match those of the radios you are calling, their Selcall alarms will be activated as if their full 5 digit Selcall Idents had been received. To achieve this, the 10 radios you are calling must be programmed with sequentially numbered Selcall Idents. e.g , 12031, 12032, >, Transmitting the Selcall Ident will only activate the alarm in the radio with the Selcall Ident of Transmitting 1203A will activate the alarms in all radios with Idents through (a total of 10 radios). If the radios in your fleet do not have sequentially numbered Selcall Idents and you want to make use of this function, you can arrange for your dealer to re-program the Selcall Idents in your radios. PAGE 14 INSTRUCTION MANUAL TX4400

15 Programming and Sending Group Calls Entering a Group call Ident is the same as entering a normal Selcall Ident. 1. Press the CALL button to select the CALL TO mode. CALL TO is displayed with a memory location number on the left and an associated 5 digit Selcall Ident on the right. If the radio is in the ALPHA display mode, briefly press the F key followed by the ALPHA key to return to the Ident display. 2. Enter the required Selcall ident as follows: (a) Briefly press the channel knob. The right-hand digit of the Selcall Ident will flash. (b) Rotate the Channel knob to select 'A' in the righthand flashing digit position. This is the special code that will create the Group Call. Insert A in the last digit position (c) Briefly press the channel knob again to select the next digit position. (d) Rotate the Channel knob to select the required number in the next flashing digit position. 3. Repeat steps (c) and (d) to enter all 5 digits as required. When completed, the first 4 digits of the Ident you have entered will match all the radios in the group. The last digit will be set to 'A'. Once the Ident has been entered you have 20 seconds to send it otherwise the 'CALL TO' mode will be cancelled and the Ident you entered will be lost. Sending the Selcall Ident With the required Selcall Ident displayed in the CALL TO mode, press and hold the CALL button for a few seconds until the radio beeps. The Selcall Ident will be sent automatically and the radio will return to normal operation. Call Acknowledge in Group Mode There is no call acknowledge when sending group calls. This is to prevent all the radios in your group from trying to respond to your Selcall transmission at the same time. Storing Group Call Idents Group Call Idents can be stored in memory in the same way as a standard Selcall Ident. Receiving Group calls Receiving a Group call is identical to receiving a normal Selcall except that the alarm sound is a LOW tone beep instead of the normal High tone beep. The Callers Ident or ALPHA Name appears on the display in the usual way. OVERVIEW PAGER (Transpond) MODE The PAGE or transpond feature allows you to leave your radio unattended yet still be informed of any incoming Selcalls. If your Selcall Ident is received while your TX4400 is in the PAGE mode it will automatically transfer the incoming Selcall to another UHF radio. The page mode can be used either while monitoring a single channel or while scanning in open scan or group scan mode. To receive the Paging call, the other UHF radio must be fitted with a CCIR compatible Selcall. Note: To allow your TX4400 to operate in the PAGE mode when your vehicle is unattended, your radio must be wired so that it has a continuous 13.8 Volt power source even when the vehicle's ignition is switched off (see installation instructions). SELECTING THE PAGing CHANNEL Your TX4400 can be set to PAGE on any of the 40 UHF CB channels. Select the required Paging channel as follows: 1. Turn the TX4400 OFF. 2. Press and hold the F and PAGE keys simultaneously while turning the radio ON. The radio will display PAGE along with the currently selected paging channel. 3. Rotate the Channel switch to select the new paging channel. 4. Turn the radio OFF to store the new channel. You can now turn the radio back ON again for normal operation. Select Pager Ident SETTING THE PAGing IDENT For the Paging feature to work, you must program your TX4400 with the Selcall Ident of the radio you wish to transfer the incoming calls to. This PAGE Ident is stored in memory location 11 of the 'Call To' memory. It is TX4400 INSTRUCTION MANUAL PAGE 15

16 programmed in the same way as other Selcall Idents. 1. Press the CALL button to select the CALL TO mode. CALL TO will be displayed with a memory location number on the left and an associated 5 digit Selcall Ident or ALPHA Name on the right. 2. Rotate the Channel switch to select the memory location 11. If your radio is in ALPHA mode, PAGER will be displayed. This is a fixed ALPHA name for the Paging memory and cannot be changed. If necessary, briefly press the F key followed by the ALPHA key to select the IDENT display mode. Select Memory Location Enter the required Selcall ident as follows: (a) Briefly press the Channel knob. The right-hand digit of the Selcall Ident will flash. (b) Rotate the Channel knob to select the required number in the flashing digit position. (c) Briefly press the Channel knob again to select the next digit position. (d) Repeat steps (b) and (c) to program all 5 digits as required. 4. Now press and hold the Channel knob. The Selcall Ident will flash for a few seconds, then the radio will beep as the Ident is stored in the Paging memory. MONITORING A SINGLE CHANNEL WHILE IN PAGE MODE To monitor a single channel in the Page mode: 1. Select the required channel using the channel switch. 2. Briefly press the F key followed by the PAGE key. 'PAGE' will be displayed along with the selected channel. The page mode is now active. Selected Channel Call To Mode Enter Pager Ident Page Mode Selected Note: The display lighting will extinguish after 10 seconds to conserve power in case the radio is to be left in Page mode for an extended period. This also makes the radio less visible if it is left in an unattended vehicle at night. Once the Page mode is selected, you can transmit and receive on the selected channel in the usual way. However, the Channel switch and the SCAN, OS/GS, DUP and CALL keys are disabled. Note: If the selected channel has been tagged for Quiet operation, the QUIET mode will be automatically selected and QUIET will be displayed. In this case, you will not be able to transmit. If you Selcall Ident is received on the selected channel: Your TX4400 will send an acknowledge beep back to the caller then change to the Paging channel and transmit the Page Ident. It will finally return to the selected channel, sound the alarm and display the Ident or Alpha Name of the caller. Meanwhile the other receiver will be beeping to tell you that someone has called you. You can then return to your TX4400, identify the caller s Ident and return the call. Note: Before transmitting on the Paging channel, the TX4400 will check the channel for activity and will not transmit if the channel is in use. Only when the channel is clear will the paging Ident be sent. SCANning IN PAGE MODE 1. Select the required SCAN group, program the required channels and then briefly press the SCAN key. The radio will begin scanning. 2. Now briefly press the F key followed by the PAGE key. 'PAGE' will be displayed. Using Open Scan If the radio is scanning in the Open Scan mode, you will not be able to transmit unless the scan has stopped on a busy channel. Using Group Scan If the radio is scanning in the Group scan mode, you can transmit on the Priority channel at any time. Using the QUIET mode If any channels have been tagged for Quiet operation, the QUIET mode will be automatically selected and 'QUIET' will be displayed. You will not be able to transmit. If while scanning on any channel, your Selcall Ident is received: The TX4400 will stop scanning on that channel, send an acknowledge beep back to the caller then change to the Paging channel and transmit the Page Ident. It will finally return to the channel, sound the alarm and display the Ident or Alpha Name of the caller. Meanwhile the other receiver will be beeping to tell you that someone has called you. You can then return to your PAGE 16 INSTRUCTION MANUAL TX4400

17 TX4400, identify the Caller s Ident and return the call. Note: Before transmitting on the Paging channel, the TX4400 will check the channel for activity and will not transmit if the channel is in use. Only when the channel is clear will the paging Ident be sent. TO RETURN A CALL IN PAGE MODE If you return to your radio and it is beeping, briefly press the QUIET key. The radio will exit the PAGE mode and 'CALL FROM' will be displayed along with the Selcall Ident or Alpha Name of the Caller. To return the call, briefly press the CALL button. The Caller's Ident will be transferred to the 'CALL TO' mode ready for sending. Now press and hold the CALL button for a few seconds until the radio beeps. The callers Selcall Ident will be sent. If the call is successful, you will hear two quick acknowledge beeps in your radio's speaker as the caller's radio responds. DEACTIVATING THE PAGE MODE To de-activate the Page mode, briefly press the QUIET key. To de-activate the Page mode and jump to the Priority channel, briefly press the Channel knob. CTCSS CTCSS (Continuous Tone Coded Squelch System) is a squelch quietening system that allows several groups of users to share the same channel without disturbing each other. It uses one of 50 preset sub-audible (very low frequency) tones to open and close the squelch on your radio. The system applies a continuous low-level tone to your transmission and a matching tone decoder to your receiver's Squelch. With CTCSS enabled, the channel remains quiet to all incoming signals unless they carry the correct tone. When a transmission with the correct tone is received, the Squelch opens and remains open for as long as the signal is present. When the transmission ends, the channel becomes quiet again. Transmissions that do not use the correct tone will not be heard. The TX4400 allows CTCSS to be enabled or disabled on individual channels. In addition, the CTCSS tone frequency is user programmable. Note that the CTCSS tone you select will be used for all CTCSS enabled channels in your radio. MONITOR FUNCTION The monitor function temporarily opens your radio's Squelch to allow you to listen for signals from other CTCSS users outside your group. Because their CTCSS tone is different to yours, your Squelch would normally remain closed, preventing you from hearing them. By using the Monitor switch, you can open the squelch and listen on the channel to check that it is clear before transmitting. This will help prevent you from accidently transmitting over the top of someone. To use the Monitor Function, press the Squelch knob (MON). If no signals are present you will hear the usual hiss of an empty channel. The squelch will remain open as long as the Squelch knob remains pressed. Release the Squelch knob to restore the Squelch to its previous setting. SELECTING THE required CTCSS TONES To select the required CTCSS tones on your radio, use the following procedure: 1. Switch the TX4400 OFF at the volume control. 2. Press and hold the F and SILENT keys simultaneously while turning the radio ON again. 'CODE' will be displayed and the 'SILENT' icon will be flashing. In addition the BUSY icon will be visible indicating you are about to select the receiver's CTCSS tone. The channel display will now correspond to one of 50 different CTCSS tones as shown in the table below. The factory default is 00, which is No Tone. 3. To select the desired receiver tone, rotate the Channel switch until the required tone number is displayed. 4. Press and hold the QUIET key for a few seconds. Both the code number and the 'SILENT' icon will flash, then the radio will beep as the code is stored. Selected CTCSS Tone 5. Briefly press the QUIET key. The 'TX' icon will appear indicating you are now selecting the transmitter's CTCSS tone. 6. To select the desired transmit tone, rotate the Channel switch until the required tone number is displayed. 7. Press and hold the QUIET key for a few seconds. Both the code number and the 'SILENT' icon will flash, then the radio will beep as the code is stored. Selected CTCSS Tone BUSY Icon indicates Receive Tone is displayed SILENT is Flashing TX Icon indicates Transmit Tone is displayed Silent is Flashing TX4400 INSTRUCTION MANUAL PAGE 17

18 8. Now switch the radio OFF then ON again to return to normal operation. Note: To disable the sending or receiving of CTCSS tones, set either tone to 00. If both transmit and receive tones are set to 00, the CTCSS function is disabled and cannot be selected. ENABLing THE CTCSS FUNCTION ON A CHANNEL 2. Briefly press the F key followed by the SILENT key. A high beep will be heard and the 'SILENT' icon will appear. You may activate CTCSS on as many channels as you wish except the emergency channel 5. To de-activate CTCSS, repeat steps 1 & 2 above. A low beep will be heard and 'SILENT' will disappear. 1. Select the required channel. CTCSS TONE FREQUENCY CHART Tone No. Frequency Hz Tone No. Frequency Hz Tone No. Frequency Hz Tone No. Frequency Hz HOW TO DISABLE FEATURES The TX4400 has a number of features that can be disabled by the user to allow for much simpler operation. This is done by disabling one or more of the keys on the front panel. These include the Function, Scan/Dim, OS/GS/Page, Duplex/Alpha and the Quiet/Silent keys. To disable one of the keys: 1. Turn the radio OFF. 2. Press and hold the key you wish to disable while turning the radio back ON. A low beep will be heard and the selected key will no longer function. To re-enable the key, repeat the steps above. When the radio is turned on again, a high beep will be heard and the key will function normally again. For example, to disable the SCAN function: 1. Turn the radio OFF. 2. Press and hold the SCAN key while turning the radio back ON. A low beep will be heard and the SCAN function will no longer be available. Repeat the procedure to re-enable the SCAN function. REPEATERS A repeater system consists of a linked transmitter/receiver combination installed in a prominent location. The repeater is designed to receive signals on a designated channel and re-transmit them on another channel. Repeaters are usually located on hills, mountains or tall buildings. The increased elevation greatly improves the range of the repeater beyond that of a normal base or mobile. This means that the repeaters are able to receive and retransmit signals to radios that would otherwise be out of range of each other. Normally, UHF radios transmit and receive on the same channel. This is known as SIMPLEX operation. However, to communicate through repeaters, your radio must be able PAGE 18 INSTRUCTION MANUAL TX4400

19 to transmit and receive on different channels (known as DUPLEX). Your TX4400 has a Duplex key to allow you to operate through repeaters.- The Duplex function only operates on channels 1-8, as these are the channels that have been designated for repeater use. When Duplex mode is selected, your TX4400 receives on the selected channel (e.g. channel 1) but automatically transmits 30 channels higher (i.e. channel 31). The UHF repeater receives your signal on Channel 31 and retransmits it on channel 1 for others to hear. SIMPLEX/DUPLEX RANGE COMPARISON INSTALLATION The TX4400 is supplied with a double action mounting bracket and vibration proof washers. The mounting bracket can be secured in any convenient location (i.e. under the dash, above the dash, on the centre console etc). The TX4400 mounting bracket is designed with a unique dual position gimbal mounting slot. This design not only allows the TX4400 to be tilted over a much greater range, but also provides a slim, low profile mounting position for installations where space is very limited. When installing the radio, avoid mounting it close to heaters or air conditioners. Screw the mounting cradle to a firm surface. The vibration proof washers have an adhesive backing on one side. The vibration proof washers have an adhesive backing on one side. Centre Mount Rear Mount This allows them to remain in the correct position when removing or refitting the radio. Slide the TX4400 into the bracket, adjust it for the correct viewing angle and tighten the gimbal knobs securely. Finally, connect the power and antenna leads to the sockets provided on the rear of the radio. Note: The sides of your TX4400 have two pairs of gimbal mounting holes - one pair in the centre of the case and the other pair towards the rear. A black label covers the rearward gimbal holes. For most installations, the mounting bracket should be installed using the central gimbal holes. When installing the radio, avoid mounting it close to heaters or air conditioners. Screw the mounting cradle to a firm surface. The vibration proof washers have an adhesive backing on one side. This allows them to remain in the correct position when removing or refitting the radio. Slide the TX4400 into the bracket, adjust it for the correct viewing angle and tighten the gimbal knobs securely. Finally, connect the power and antenna leads to the sockets provided on the rear of the radio. Note. The sides of your TX4400 have two pairs of gimbal mounting holes - one pair in the centre of the case and the other pair towards the rear. A black label covers the rearward gimbal holes. For most installations, the mounting bracket should be installed using the central gimbal holes. Centre Mounting Position Rear Mounting Position LOW PROFILE MOUNTING RAISED TILT MOUNTING If your TX4400 is replacing an existing TX4200 or TX4000 installation, you can fit your TX4400 to the existing bracket by utilising the gimbal mounting holes near the rear of the case. Simply screw the gimbal knobs through the label TX4400 INSTRUCTION MANUAL PAGE 19

20 to access the threads in the chassis. This will bring your TX4400's front panel in line with that of your previous radio and eliminate the need to reinstall the mounting bracket. Be sure to tighten the gimbal knobs securely as there will be a little more weight forward of the mounting bracket with this installation. FITTING THE MICROPHONE The microphone uses a miniature 6 pin telephone style plug and socket. To fit the microphone: 1. Position the microphone plug so the plastic tab faces downwards. Press the plug into the socket until it clicks. 2. Gently press the rubber strain relief into the hole surrounding the socket so that the slot around the strain relief fits neatly inside the lip of the hole. Removing the microphone. 1. Squeeze the rubber strain relief near the front panel to disengage the slot, and slide the strain relief back along the microphone cord. 2. Press the small plastic tab on the microphone plug towards the plug to unlock it, while gently pulling the plug outwards. If the plug does not come out easily, the tab has not released correctly and should be pressed again. You may need a small bladed screwdriver for this task, as the tab can be difficult to reach with your fingers. Figure Secure the rear microphone printed circuit board (PCB) supplied with the LEM6M accessory kit with the screws provided (Figure 3). 4. Connect the 6 pin lead attached to the rear microphone PCB and the 6 pin socket on the front PCB. Figure 2. Cable Lift locking tab to release plug Microphone plug Figure 3. Rear microphone PCB Connection to front PCB Rear Microphone Connection TX4400M The TX4400M comes with the LEM6M rear accessory pack factory fitted. To fit the rear mounting microphone optional accessory kit (LEM6M): 1. Remove the 4 screws from the rear panel securing the cover and slide the cover from the radio (Figure 1). 2. Turn the TX4400 upside down, remove the black grommet from the back of the radio and insert into the front panel microphone socket aperture of the TX4400 (Figure 2). Rear microphone socket 5. Refit the cover and fasten with the 4 screws Microphone Extension Lead The LEM6P is a 4 metre microphone extension lead that can be fitted to the microphone socket. PAGE 20 INSTRUCTION MANUAL TX4400