Sigma-Tek 1U Radio Control Panel Operator s Manual

Transcription

1 Sigma-Tek 1U Radio Control Panel Operator s Manual 86M069

2 TABLE OF CONTENTS 1.0 GENERAL DESCRIPTION THEORY OF OPERATION VHF COMMUNICATION MODULES OPERATING PROCEDURE MEMORY STORE & RECALL PROCEDURES TEST FUNCTION SQUELCH CHANNEL SPACING NAVIGATION MODULES OPERATING PROCEDURE MEMORY STORE / RECALL TEST FUNCTION MARKER BEACON SENSITIVITY TRANSPONDER MODULE OPERATING PROCEDURE TEST FUNCTION STANDBY ALTITUDE REPORTING /14/2000 i

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4 1.0 GENERAL 1.1 DESCRIPTION The 1U Radio Control Panel (RCP) was designed to remotely tune two (2) VHF COMM transceivers, two (2) VHF NAV/DME receivers, and one (1) or two (2) Air Traffic Control (ATC) transponders. The RCP tunes within two (2) VHF COMM frequency ranges. If a Collins VHF 22C is installed, the accessible frequency range is from (0) to (0) MHz in either 25 KHz or 8.33 KHz increments (switch selectable). If a Collins VHF 22D is installed, then the available tuning range is from (0) to (5) MHz in 25 KHz or 8.33 KHz increments from to , and in 25 KHz increments from (0) MHz to (5) MHz. The NAV/DME tuning range is from to MHz in 50 KHz increments. Being able to pre-select frequencies for both the NAV and VHF COMM modules provides the first level of memory. Ten (10) additional memory locations, or channels, can be accessed by pressing the MEM buttons. Audio volume controls with integrated power Off switches are included for both the VHF COMM and NAV modules. Other typical controls are: VHF COMM: Squelch On/Off, Test NAV/DME: Marker Sensitivity Hi/Lo, Test ATC transponder(s): Ident, Test, Normal /Standby/Lo, Altitude Reporting On/Off, and System 1 / 2 select The RCP has five (5) dual line, five and a half (5 ½) digit, Liquid Crystal Display (LCD) modules. These displays offer a high degree of readability in bright sunlight, and are backlit for enhanced viewing in low ambient light. The VHF COMM and NAV displays show two (2) lines of information. The top line shows the Active frequency, and the bottom line shows the Preselect frequency. The Preselect frequency is altered by turning the knobs accordingly. Once the desired frequency has been selected, it can be transferred to the Active display by pressing the Transfer button. The radio is tuned to the Active frequency. 02/14/2000 1

5 The RCP has an integrally lit, plastic panel which includes all pertinent nomenclature required to identify the function of each control and annunciator. Dimming is controlled by the aircraft 5 VDC dimming buss. The nomenclature is clearly readable in both low and high ambient lighting. The RCP contains five (5) independent radio control modules, one per radio, and each is similar in construction. All modules have a front panel which consists of a display, a frequency selector, and a number of control switches. Housed in an aluminum enclosure are three (3) or four (4) printed circuit boards (PCBs). The microcomputer (MCU) board is common to all modules. It performs the control and computational functions for each module, including all input and output tasks, and providing service to the radio. The power supply board is also common to all modules. Its main function is to derive power from the aircraft and convert it to those voltages required by the internal circuitry. This board includes input protection circuits to prevent damage that may be caused by lightning. There are two (2) types of boards that provide the radio interfaces. A parallel tuning interface board generates ARINC 410 output signals that are used to tune the NAV / DME receivers and the ATC transponder(s). The Collins CSDB (Collins Serial Data Bus or Commercial Standard Data Bus) interface board is used in the VHF COMM modules to serve as an interface between the module and a Collins VHF-22 (C or D) transceiver. 1.2 THEORY OF OPERATION All five (5) modules operate similarly, and have certain functions in common. These are described below along with unique functions only applicable to the specific module type. 02/14/2000 2

6 1.2.1 Frequency or Code Selection Rotary, optical encoders are used as frequency selectors. There are two (2) knobs, used to select the desired frequencies. The COMM and NAV modules MHz knob (large) controls the 1 and 10 MHz digits, and the KHz knob (small) controls the KHz digits. Only the Preselect display is affected by the frequency selector. Pressing the TFR transfers (or interchanges) the Preselect and Active frequencies. The radio is tuned to the Active frequency which is shown in the top line of the display. Variable rate tuning is used on the ATC module to allow faster selection of a four (4) digit code with two (2) knobs. The larger diameter knob selects the left two (2) code digits while the smaller diameter knob selects the right two (2) digits. The ATC module uses a single line display which is the active code, changed directly by the optical switch and tuned to by the transponder. The transponder is not tuned until three (3) seconds have elapsed since the knobs were last turned. The NAV modules produce paired 2 of 5 codes per ARINC 410 for NAV and DME receiver frequency selections. The ATC transponder module provides a four (4) digit octal code selection scheme. VHF COMM frequency selection utilizes a serial, CSDB protocol Memory Store & Recall All five (5) modules contain non-volatile memory to store the last Active and Preselect frequencies selected prior to power down. (The ATC module has only one (1) line, the Active code.) These selected frequencies are restored onto the display and sent to the radio on the next power up cycle. The VHF COMM and NAV modules also store and recall 10 additional frequencies, or channels, in non-volatile memory. To change memory contents, press the appropriate MEM button on the RCP. The MEM button toggles between the Command and the Memory mode. When in the Memory mode, the TFR button acts as a toggle between the Memory Store and Memory Recall modes. The frequency select knobs control the lower display line. The Memory Mode starts in the Memory Recall mode with the stored frequency displayed in the upper display line and a reference channel number in the lower line. In the Memory Recall mode, any of the 10 stored channels (0 through 9) can be selected by turning either knob. The smaller or larger knob will increment or decrement the channel number between 0 and 9. In the Memory Store mode, (the memory channel number is in the upper display line, and its frequency is in the lower) the stored frequency of a selected channel can 02/14/2000 3

7 be changed using the frequency selector knobs. A time-out function is designed into the Memory Mode. If the frequency select knobs have not been turned or the MEM button has not been pressed after a delay of about ten (10) seconds, the display will default back to the Command mode Test Functions Five (5) test switches are located on the front panel of the RCP, one (1) for each module. The switches test the internal electronics, display, and the equipment being controlled. If the test is successful, all display segments will be illuminated for as long as the button is pressed. Indicators are also tested when the push-button is pressed Audio Volume Control The VHF COMM and NAV modules include a volume control. The volume control incorporates a power On / Off switch which powers both the module and its associated radio Other functions MKR HI / LO The NAV modules incorporate a two (2) position toggle switch for setting the HI / LO sensitivity mode of the Marker Beacon radio. IDENT This push-button switch, located in the lower center of the RCP, activates the ATC transponder identification signal. NORM / STBY / LO The transponder mode can be selected using this three (3) position toggle switch which is located in the lower center of the RCP. ALT RPTG - ON / OFF Select the altitude reporting mode with this toggle switch which is located in the lower center of the RCP. 02/14/2000 4

8 XPDR - 1 / 2 This toggle switch selects between two (2) ATC transponders if a second transponder is installed in the aircraft. The RCP is normally supplied with an attached Locking Mask that keeps this switch in the 1 position. If the aircraft incorporates two (2) transponders, this Locking Mask can be removed. SQ ON / OFF The VHF COMM modules incorporate a two (2) position toggle switch for switching the squelch circuitry in the radios On or Off. COMM FREQ / 25 This is a pull-to-unlock type toggle switch, which selects either the 25 KHz or 8.33 KHz tuning mode of the VHF COMM transceivers. The VHF COMM module displays show only two (2) active KHz digits in the 25 position and three (3) active KHz digits in the 8.33 position Lighting Control The plastic panel back lighting is controlled directly by the aircraft s five (5) VDC dimming buss. The LCD back lighting and the indicators are powered by the internal 5 VDC supply. The intensity of the LCD lighting and the indicators are controlled by the microcomputer after sampling the dimming buss. If the dimming buss voltage is less than 0.5 VDC it is assumed that the panel lighting buss is off. Under this condition, the display and indicators are set to full brightness. When the dimming buss voltage is greater than 0.5 VDC, the LCD and indicator brightness will track the plastic panel brightness Emergency Operation In case of a RCP, VHF COMM module failure which results in the loss of transceiver tuning control, the corresponding Collins VHF-22 (C and D) COMM transceiver will revert to the international emergency frequency of (0) MHz. 02/14/2000 5

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10 2.0 VHF COMMUNICATION MODULES DESIGNATION CONTROL FUNCTION 1. ACTIVE Display 2. PRESELECT Display Active Frequency Preselect Frequency Displays the frequency that the radio is tuned to. Displays the frequency being selected. 3. MEM Button Memory Mode Press button to enter or exit the Memory mode. 4. SQ ON/OFF Switch 5. MHz Knob Megahertz Selector Squelch Control Switch On to squelch. Rotate to select frequencies in 1 MHz increments. 6. KHz Knob Kilohertz Selector Rotate to select frequencies in 25 KHz (or 8.33 KHz) increments. 7. TFR Button Interchange Press to swap the Preselect and Active frequencies. 8. TEST Button VHF COMM Test Press to test. 9. VOL OFF Pot 10. COMM FREQ 11. Xmit Indicator Power and Volume Control Frequency/Chann el Spacing Rotate CW to apply power and increase audio level. Switch between 25 KHz or 8.33 KHz frequency/channel spacing. ~ Green indicator, active when radio is transmitting. 02/14/2000 7

11 2.1 OPERATING PROCEDURE 1. Turn VOL-OFF knob clockwise to apply power. Select the desired audio level. 2. Press the TEST button. All of the display segments and the transmit indicator should illuminate. Release the button to exit the Test Mode. 3. Rotate the MHz and KHz knobs to select the desired Preselect frequency. 4. Press TFR button to interchange the Preselect and Active frequencies. 2.2 MEMORY STORE & RECALL PROCEDURES Programming Memory Channels a. Press the MEM button to enter the Memory Mode. b. Upon entering the Memory Mode, the display will show a frequency on the top line and a memory channel on the bottom line. Using either knob, select a channel to view or program (0 through 9). The knobs act only on the bottom display line. 02/14/2000 8

12 c. Once the desired memory channel has been selected, press the TFR button to interchange the channel number and the frequency. Note that the knobs act only on the bottom line of the display. d. Select the desired frequency using the knobs. e. Press the TFR button again to store the new frequency in memory, and swap the top and bottom lines of the display. Press the MEM button to exit the Memory Mode Recalling Memory Channels a. Press the MEM push-button to enter the Memory Mode. 02/14/2000 9

13 b. Once in the Memory Mode, the display will show a frequency on the top line and a channel number on the bottom line. Using either knob, select the desired memory channel to view. c. To tune the radio to the recalled frequency, press the TFR button to interchange the channel number and the frequency. Press the MEM button to exit the Memory Mode. The recalled frequency replaces the previous frequency on the Preselect line of the display. d. To finish tuning the radio to the recalled frequency, press the TFR push-button. The Preselect and Active frequencies are interchanged, and the radio is tuned to the new Active frequency. 2.3 TEST FUNCTION The Test Mode is entered whenever the TEST button is pushed. The module performs a series of internal self-tests, sends a test command to the equipment being controlled, turns on every display segment, and illuminates the transmit indicator. Release the button to exit the Test Mode. 2.4 SQUELCH A two (2) position toggle switch is provided to select whether the squelch is On or Off. In the Off position, both background and foreground audio signals are heard. 02/14/

14 2.5 CHANNEL SPACING The 25 KHz / 8.33 KHz (COMM MODE) toggle switch is located in the top / center of the RCP, and is a pull-to-unlock type. Placing switch in the 25 KHz position, forces both VHF COMM modules to tune in 25 KHz increments. The display will not be updated until the knobs are turned. Once either knob is turned, the rightmost digit is blanked to indicate that 25 KHz spacing is being used. The Active frequency remains unchanged until a 25 KHz frequency from the Preselect line is interchanged with the Active frequency using the TFR button. Placing the COMM MODE switch in the 8.33 KHz position, forces both VHF COMM modules to tune in 8.33 KHz increments. The display will not change until either knob is turned. Once a new Preselect frequency is selected, the right most digit will become active indicating 8.33 KHz spacing. The Active frequency remains unchanged until a 8.33 KHz frequency from the Preselect line is interchanged with the Active frequency using the TFR button. Frequencies previously stored in memory are displayed in the mode in which they were originally stored. If a frequency is changed while in the Memory Mode, it is stored in the currently active mode. The following table correlates each displayed frequency to the corresponding radio tuning frequency. 02/14/

15 Display (25 KHz Mode) Display (8.33 KHz Mode) Radio Frequency (MHz) Collins VHF-22 (C and D) Tuning Table 02/14/

16 3.0 NAVIGATION MODULES DESIGNATION CONTROL FUNCTION 1. ACTIVE Display 2. PRESELECT Display Active Frequency Preselect Frequency Displays the frequency that the radio is tuned to. Displays the frequency being selected. 3. MEM Button Memory Mode Press button to enter and exit the memory mode. 4. MKR HI/LO Switch Marker Beacon Toggle switch to set the marker beacon sensitivity. 5. MHz Knob Megahertz Selector Rotate to select frequencies in 1 MHz increments. 6. KHz Knob Kilohertz Selector Rotate to select frequencies in 50KHz increments. 7. TFR Button Interchange Swaps the Preselect and Active frequencies. 8. TEST Button NAV test Press to test. 9. VOL-OFF Pot Power and Volume Control Rotate CW to apply power and increase volume. 02/14/

17 3.1 OPERATING PROCEDURE 1. Turn the VOL-OFF potentiometer clockwise to apply power. Set the desired audio level by turning it further to increase the volume. 2. Push the TEST button and wait for all of the display segments to turn on, then release the button. 3. Rotate the knobs as necessary to select the desired Preselect frequency. 4. Press the TFR button to interchange the Preselect and Active frequencies. The radio is tuned to the new Active frequency. 5. Set the Marker Beacon switch to the Hi position for high-altitude flying, and to the Lo position on approach. 3.2 MEMORY STORE / RECALL Programming Memory Channels a. Press the MEM button to enter the Memory Mode. b. Upon entering the Memory Mode, the display will show a frequency on the top line and a memory channel on the bottom line. Using either knob, select a channel to view or program (0 through 9). 02/14/

18 c. Once the desired memory channel has been selected, press the TFR button to interchange the channel number and the frequency. Note that the knobs act only on the bottom line of the display. d. Set the desired frequency using the knobs Recalling Memory Channels e. Press the TFR button again to store the new frequency in memory, and swap the top and bottom lines of the display. Press the MEM button to exit the Memory Mode. Note: The Preselect line will always change to the selected memory channel, even if the frequency is not in the bottom display line of the Memory Mode. This is different than the COMM Modules. Waiting for the Memory Mode to time-out will avoid changing the Preselect frequency. a. Press the MEM button to enter the Memory Mode. 02/14/

19 b. Once in the Memory Mode, the display will show a frequency on the top line and a channel number on the bottom line. Using either knob, select the desired memory channel to view. To tune the radio to the recalled frequency, press the TFR button to interchange the channel number and the frequency. c. Press the MEM button to exit the Memory Mode. The recalled frequency replaces the previous frequency on the Preselect line of the display. Note: The Preselect line will always change to the selected memory channel, even if the frequency is not in the bottom display line of the Memory Mode. This is different than the COMM Modules. Waiting for the Memory Mode to time-out will avoid changing the Preselect frequency. d. Press the TFR button. The Preselect and Active frequencies are interchanged, and the radio is tuned to the new Active frequency. 3.3 TEST FUNCTION The Test Mode is entered whenever the TEST button is pushed. The pertinent module performs a series of internal self-tests, sends a test command to the equipment being controlled, and turns on every display segment. Release the button to exit the Test Mode. 3.4 MARKER BEACON SENSITIVITY Place the sensitivity switch in the Hi position for high-altitude flying (away from airports), and to the Lo position for an approach. 02/14/

20 4.0 TRANSPONDER MODULE DESIGNATION CONTROL FUNCTION 1. ATC Display ATC octal code. Indicates selected ATC code. 2. VFR Button Access VFR codes Changes active code to 7000 or IDENT Button Identify Activates ATC identification signal. 4. STBY ON/OFF Switch Transponder standby 5. CODE SELECT Thousands / Hundreds Digits Primary power for transponder warm up. Rotate to set leftmost two digits of transponder code. 6. CODE SELECT Tens / Units Digits Rotate to set rightmost two digits of transponder code. 7. TEST Button Transponder Test Press to test. 8. XPDR Switch Transponder selection 9. ALT RPTG Altitude Reporting ON/OFF Switch Selects between ATC system 1 and 2. Select altitude reporting mode. 10. REPLY Indicator Reply Light Indicates Ident has been received. 02/14/

21 4.1 OPERATING PROCEDURE 1. Ensure that the circuit breakers for the transponder systems are on. 2. Press TEST button. All display segments should turn on, and the Reply indicator should illuminate. 3. Select the desired XPDR (Transponder) Sys 1 or 2 (if available). 4. Change ATC codes by turning the knobs, and activate other transponder functions by operating the control switches. 5. Press VFR button as required. This button will change your code to 7000 or TEST FUNCTION The Test Mode is entered whenever the TEST button is pushed. The module performs a series of internal self-tests, sends a test signal to the equipment being controlled, turns on every display segment, and illuminates the REPLY indicator. Release the button to exit the Test Mode. 4.3 STANDBY This switch controls the primary power for the ATC transponders. When in the STBY position, primary power is connected but only for standby operation. Ensure that the transponders are in the STBY mode while taxing for takeoff or after landing to eliminate undesirable interference on local displays. If you place STBY in the Off position it disconnects the primary power to the transponder. 4.4 ALTITUDE REPORTING If the ALT RPTG switch is On, altitude information from the altimeter(s) is transmitted by the transponder(s) to the ground. 02/14/

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