Appendix A: IFR 1200 Test Procedures MAINTENANCE GUIDE.

Transcription

1 ppendix : IFR Test Procedures MTNNC GUID

2 MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS Contents ppendix : IFR Test Procedures... MT- Testing with the IFR by erofl ex... General Set-Up and Connections... Radio Service Software (RSS)... Control Cards... Turning the MT- Receiver and Transmitter Modules... dapters, Cables and xtender Cards... udio Connections... Codan MT- Radio System Test Sheet... System Regulator Testing... System oltage Testing... Receiver Testing... udio Distortion... Reference Sensitivity... Squelch...7 udio Level...7 RF Preselector lignment and Tuning... Reference Oscillator djustment... Transmitter Testing... udio Distortion... RF Power... Reference Oscillator djustment... Deviation Level... CTCSS Testing...7 System Testing... Distortion... Deviation Level... Page i

3 MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID PPNDIX : IFR TST PROCDURS MT- TSTG WITH TH IFR BY ROFLX This Chapter contains instructions for Tuning, Testing, Maintaining and Servicing MT- nalog and P Digital Radio Systems with the IFR Service Monitor by erofl ex. This Chapter is intended as an aid to confi guring and testing Codan MT- radios using the IFR. Neither Codan limited or erofl ex Inc. assume responsibility for damage caused to either unit as a result of misinterpretation or misuse of this procedure. Codan manufactured products are warranted against defective materials and workmanship. This warranty does not extend to damage due to misuse, neglect, accident, improper confi guration or installation. Codan and erofl ex shall be released from all obligations under its respective warranty in the event the Products are subject to misuse, neglect, alteration, accident, improper installation or testing, or if unauthorized repairs are performed by the customer or others. These procedures can be modifi ed, changed and altered at any time to better suit your specifi c needs and requirements. Refer to Codan Radio Communications Instruction Manuals for complete radio system specifi cations. ppendix : IFR Test Procedures Page

4 MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS GNRL ST-UP ND CNCTIS Radio Service Software (RSS) Start the RSS program on the computer and ensure you are connected to the receiver or transmitter via the type to pin mini-type B USB cable. Read the transmitter or receiver programming and familiarize yourself with the settings (RF frequency, wide / narrowband, digital / analog, CTCSS / NC, etc.). Control Cards Some Codan MT- radio systems may have an C- udio Control Card or CI-BC- Base Control Card for use in the radio system. The Control Cards connect to the receiver and transmitter balanced audio lines with an unbalanced load, which could cause some measurements to be in error. If the radio system includes an C- udio Control Card or CI-BC- Base Control Card, remove the control card from the rack for the individual receiver and transmitter tests unless otherwise noted. Turning the MT- Receiver and Transmitter Modules Turning the switch on the front panel of the MT- receiver or transmitter modules to the position can cause unwanted effects on other MT- receiver and transmitter modules. When the MT- receiver and transmitter are connected directly together with the LDS serial data RJ cable, turning the MT- transmitter front panel switch to the position will cause the MT- receiver module to turn off. The MT- receiver modules and D LDs on the front panel will blink on and off when this occurs. Turning the MT- receiver modules front panel switch to the position will not cause any adverse effects on the MT- transmitter. When turning the MT- receiver modules front panel switch from the to position (or vice versa), it will cause the MT- transmitter to reboot. Remove the RJ cable to stop this interaction from occurring. When connecting the LDS serial data RJ cables to the CI-RC-L repeater control card or CI-RC-M-G multiple link controller, the MT- receiver and transmitter modules are isolated from each other and the modules can be turned on or off independently of each other. When the MT- receiver and transmitter channel and bank select lines are connected together in parallel, turning the MT- receiver or transmitter front panel switch to the position will cause the channel and bank select lines to be grounded. This will cause the other MT- module to operate on Bank B, Channel regardless of how the channel and bank select lines are set. If the bank select lines are not connected in parallel, only the channel will be affected. The channel select lines are independent of the LDS serial data RJ cables (the cables will have no impact on the channel select). When the MT- receiver and transmitter are connected to the antenna relay in the System Regulator module, turning the MT- transmitter front panel switch to the position will cause the MT- transmitter PTT OUT line to be grounded, activating the antenna relay and causing it to be switched so that the transmitter is connected to the antenna. This makes it impossible to test the MT- receiver through the antenna relay when the MT- transmitter is turned off. When performing maintenance on the Codan MT- radio system it is best to simply remove the MT- receiver or transmitter, that is not being tested, from the subrack and disconnect all RJ cables, rather than turning the front panel switch to the position. ll Codan modules are hot swappable. There is no need to disconnect the power supply when inserting or removing the modules from the subrack. Page ppendix : IFR Test Procedures

5 MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID dapters, Cables and xtender Cards arious adapters, cables and extender cards are required for the different radio tests. xtender cards and adapters are available from Codan Radio Communications. The receiver reference oscillator and RF preselector fi lter tests require an SMB - BNC adapter and a small SMB - SMB cable is required for the reference oscillator test as well. The SMB adapters and cables are included in the -TK- Tool Kit. udio Connections The Receiver, Transmitter and uxiliary Balanced audio lines are available for connection on Codan extender cards or by connecting to the optional back panel -PNL-UX- screw-type terminal connector. The extender cards have solder points available on each signal line that can have a small test point (-TP) that is supplied with the extender card, soldered to them for easy connection with clip-on type clips. Recommended Test Points are: udio Control Card and Base Control Card xtender Card pins (C-D and C-K-.): uxiliary udio Output = B and uxiliary udio Output = C and C (udio Control Card); C and C (Base Control Card) uxiliary udio Input = C and C uxiliary udio Input = B and Receiver and Transmitter xtender Card pins (C-8RD and C-8RK-.): Rx Balanced udio Output = B and Z Tx Balanced udio Input = B8 and Z8 Tx Subtone Input = B and Ground (B) The test points can be soldered into the extender cards as shown in Figure -. test points soldered onto extender card Figure -: C-D and C-8RD Direct Connect xtender Cards with Test Points dded Codan MT- Radio System Test Sheet Codan MT- Radio System Test Sheet is included in Chapter 7 of this Maintenance Guide. It is recommended that this test sheet be fi lled out each time the radio system is tested. If two or more pairs of transceivers are tested, use a second test sheet to record the results. The test sheet will record settings for a single Tx and Rx frequency, however other frequencies can be tested and recorded if desired. ppendix : IFR Test Procedures Page

6 7 7 PULL DOWN TO RMO MD CND MD CND utohold STUP db db ac+dc ac+dc DIGITL MULTIMTR FST MN MX CNCL LOGGG S CLR MM ac+dc YS NO ac+dc TMPRTUR MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS SYSTM RGULTOR TSTG System oltage Testing The fi rst stage of testing a Codan MT- radio system is to perform a basic system check on the supply and regulated voltages. The System Regulator module is designed with a convenient and easy test point built into the front panel. This test point allows a technician access to the DC supply and regulated voltages. Simply connect a standard Digital olt Meter (DM) to the MTR jacks on the front panel of the System Regulator as shown in Figure -. RPTR CTROL TRNSMITTR FRQUNCY (MHz) RCIR FRQUNCY (MHz) SYSTM RGULTOR FUNCTI DC SWITCH SWITCH B TX RF MICMOD USB D KY TX NLOG DIGITL D SQ. DISBL RF 8 OL 7 + MTR POWR HOLD M MX Hz % ms ns RL RNG RX TX B RX B CNTL BUS MIC RF OUT USB CNTL BUS RF T XT XT - m m F C m IW m m COM MODL # COD MODL # COD MD CND Figure -: System Regulator oltage Testing The FUNCTI rotary switch on the front panel of the System Regulator will allow you to test various points in the radio system. Following is a list of System Regulator rotary switch positions, the functions they measure and the parameters measured: Supply oltage + dc to +7 dc (+.8 dc nominal) +. olts Regulated +. dc (±. dc) Rx udio Receiver udio (NOT Rx Balanced Output) Rx Carrier Strength dc to +. dc based on received signal strength ( dc is a low RF signal level, +. dc is high) Rx B udio Receiver B udio (NOT Rx Balanced Output) Rx B Carrier Strength dc to +. dc based on received signal strength ( dc is a low RF signal level, +. dc is high) nter the Supply oltage and +. olts Regulated values on the MT- Test Sheet. Inject a - dbm carrier signal into the Receiver and record the RSSI oltage on the MT- Test Sheet. nter the Date, Firmware ersions and Serial numbers of the Receivers and Transmitters on the MT- Test Sheet. The Firmware ersion and Serial Number can be found by connecting the RSS and clicking on Rx ID or Tx ID. The Serial Numbers can also be found on the side of the modules. The standby current draw of the radio system should be measured for battery / solar powered systems. Connect an ammeter to the power input line and measure the standby current draw and transmit current draw of the system. nter the Standby Current Draw and Transmit Current Draw readings on the MT- Test Sheet. The maximum standby and transmit current draw is dependent on the radio system (number and class of receivers, transmitter output power, amplifi ers, auxiliary equipment, etc.). Page ppendix : IFR Test Procedures

7 MX MX MX MX K WTTS... MODULTI B T T 7 SIG- SD USB CNTL BUS D FRQUNCY (MHz) SQ. DISBL RF MD CND MODL # COD RF FUNCTI OL MTR - XT MD CND MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID RCIR TSTG Connect the IFR and Codan Radio as shown in Figure -: Rx Balanced udio Output (from pins B and Z) Computer running RSS RT POS T FOCUS HORIZ POS RTICL HORIZTL KHz / %x / DI MHz / DI... ms. K D. Hz I. D.. T I RSID IF CL CL PWRSTNDBYBTT SCOP/DM IF C RSID GND DC LOCK. FRQ RROR GN RF K K K UDIO LOCK NT / WTT MX SCN RF CHNNL.. FRQ. RROR DTMF 7 8 ND RCC DM CTCS STUP D FUNCT T PROG T SQ TRUNK TRCK CLL C MTR ST XC FILTRPGG URO / DCS T OUT DMOD XT MOD/SDDUPLX MIC/CC /W M X MX B. MOD RC DUP GN DUP GN STP NTR OLUM SQULCH MODULTI M SSB FM NR NR MID WID K K K K - - RF CL.K - - u T GNRTOR KHz TL R.K - dbm F..K WTTS G PK - -. UX PWR + m MTR KHz / %x BTT TST SIG DIST SD G N L L T/R - W MX RCIR T XT SYSTM RGULTOR POWR XT MOD / SD Input T/R port from IFR to RF on Rx USB from Computer to Rx Figure -: Receiver Testing Set up the IFR as follows:. Temporarily unplug the XT MOD / SD input.. Set the MOD switch to GN.. Set the MODULTI switch to FM NR.. Set the MTR switch to (Khz/%x).. Set the GN LL dial to -7 dbm.. Push the RF button on the keypad and input the Receiver RF frequency. 7. Push ND FUNCT then MTR (PROG) on the keypad. 8. On the T GNRTOR area turn the KHz tone (up).. djust the KHz variable level knob until the meter reads +/- % maximum deviation (+/-. KHz (narrowband) or +/-. KHz (wideband)). nter the correct CTCSS tone (if used) and deviation level for the tone.. On the T GNRTOR area turn the KHz tone (down) and turn the R tone (up).. Push T and enter the CTCSS decode tone, then NTR on the keypad.. Push ND FUNCT then MTR (PROG) on the keypad.. djust the R variable level knob until the meter reads a deviation of +/-. KHz (narrowband) or +/-. KHz (wideband).. On the T GNRTOR area turn the KHz tone (up). ppendix : IFR Test Procedures Page

8 MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS On the Codan Radio system, ensure the receiver is turned on and turn the System Regulator Speaker switch to and T. Set the FUNCTI rotary switch to position for Rx or position for Rx B (depending on the receiver being tested), then turn the volume up until the KHz tone is audible. In the Jumper Settings area of the Service section on the RSS, ensure that the Subtones on audio path selection is set to Don t pass as shown in Figure -. The IFR will conduct all tests with CTCSS tones on the audio, giving erroneous measurements, if the Subtones are set to Pass. Figure -: RSS Subtone Settings udio Distortion To check the receiver distortion, set the MTR switch to DIST. Plug the XT MOD / SD input back into the IFR. Receiver audio distortion is typically less than. %. Please note that the IFR does not have the proper bandpass fi lter for a true udio Distortion measurement according to TI-- C. The distortion reading will be slightly higher than normal when read using an IFR. nter the udio Distortion reading on the MT- Test Sheet. Reference Sensitivity To check the receiver sensitivity, set the MTR switch to SD. If not done already, plug the XT MOD / SD input back into the IFR. Slowly turn the GN LL dial down to lower RF generator levels while monitoring the SD meter. The db SD point should be at an RF carrier level less than the specifi ed nalog Sensitivity point of the receiver. nter the Reference Sensitivity ( db SD) reading on the MT- Test Sheet. If the distortion or reference sensitivity measurements are not within Codan published specifi cations, the RF Preselector may need re-alignment. Refer to the Receiver RF Preselector lignment and Tuning section. Page ppendix : IFR Test Procedures

9 MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID Squelch djust the RF carrier level up and down until the receiver squelches and unsquelches. There should be approximately. dbm of hysteresis between the squelch and unsquelch points. The squelch point can be adjusted in the Squelch Levels area of the Service section on the RSS. The Receiver operates on a Noise based squelch (default) or a Received Signal Strength based squelch (optional). The squelch can be set globally for all channels, or on a per channel basis. To set the squelch Open and Close points, inject an RF signal at the desired Open or Close level and click the Set button. nter the Squelch and Unsquelch readings on the MT- Test Sheet. udio Level The audio level adjustment is not required when connecting the receiver in a repeater confi guration using LDS Serial Data. The audio level adjustment can be done on both the Rx Balanced udio Output and the uxiliary Balanced Output ( and ). The uxiliary Balanced Output is only available on the C- Control Card or CI-BC- Base Control Card. The Receiver and uxiliary Balanced udio Outputs are ohm balanced audio outputs and will require an external ohm matching load before an accurate measurement of the audio level can be performed by the IFR. Set up the IFR as follows:. Set the GN LL dial to -7 dbm.. Set the MTR switch to (Khz/%x).. Push ND FUNCT then MTR (PROG) on the keypad.. On the T GNRTOR area turn the KHz tone (up).. djust the KHz variable level knob until the meter reads +/- % maximum deviation (+/-. KHz (narrowband) or +/-. KHz (wideband)). nter the correct CTCSS tone (if used) and deviation level for the tone.. On the T GNRTOR area turn the KHz tone (down) and turn the R tone (up).. Push T and enter the CTCSS decode tone, then NTR on the keypad.. Push ND FUNCT then MTR (PROG) on the keypad.. djust the R variable level knob until the meter reads a deviation of +/-. KHz (narrowband) or +/-. KHz (wideband).. On the T GNRTOR area turn the KHz tone (up). ppendix : IFR Test Procedures Page 7

10 MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS Receiver Balanced udio Output:. nsure the receiver is turned on and the C- Control Card or CI-BC- Base Control Card is NOT plugged into the subrack.. Disconnect the Rx Balanced udio Output from the XT MOD/SD connector and connect it to the SCOP/ DM input on the IFR.. Push ND FUNCT then DM (7) on the IFR keypad.. If the DM meter is reading a DC voltage, push +/- on the keypad to toggle between DC and C oltmeter.. In the udio Levels area of the Service section on the RSS, adjust the Rx Balanced udio Output level adjustment as shown in Figure - until -8. dbm audio level (.8 ohms) is measured on the DM meter of the IFR. If no external ohm load is available, the audio level could be adjusted for approximately.8 rms in the IFR. Figure -: RSS Receiver udio Level djustment uxiliary Balanced udio Output ( or ):. nsure the receiver is turned on and the C- Control Card or CI-BC- Base Control Card IS plugged into the subrack using an extender card. nsure that NO external devices (eg. tone remote adapter or IP router) are connected to the auxiliary audio output.. Connect the uxiliary Balanced udio Output to the SCOP/DM input on the IFR. uxiliary audio output is available on pins B and, and uxiliary audio output is available on pins C and C for the C- Control Card and pins C and C for the CI-BC- Base Control Card.. Push ND FUNCT then DM (7) on the IFR keypad.. If the DM meter is reading a DC voltage, push +/- on the keypad to toggle between DC and C oltmeter.. djust the uxiliary Balanced udio Output Level adjustment (R for ux Out, R for ux Out ) for. dbm audio level (.77 ohms). If no external ohm load is available, the audio level could be adjusted for approximately. rms in the IFR. nter the Balanced udio Output Level and uxiliary udio Output Level (if used) readings on the MT- Test Sheet. Page 8 ppendix : IFR Test Procedures

11 MX MX MX MX K WTTS... MODULTI B T T 7 SIG- SD USB CNTL BUS D FRQUNCY (MHz) SQ. DISBL RF MD CND MODL # COD RF FUNCTI OL MTR - XT MD CND MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID RF Preselector lignment and Tuning Tuning of the RF Preselector fi lter is typically only required when the Sensitivity or Distortion do not meet published specifi cations, or when the receiver RF frequency is changed beyond the band pass of the fi lter (typically - 7 MHz in a HF or UHF MHz receiver). The UHF 7 / 8 / MHz receiver RF Preselector is Full Band and does not require any tuning. Some IFR models may not have the required tracking generator option installed. Push ND FUNCT then TRCK () on the keypad. Push the UP RROW key until TRCK LOW appears on the display, then push the NTR key. If TRCK LOW does not appear on the display, then the IFR does not have tracking generator capability. Connect the IFR and Codan Radio as shown in Figure -. RF Preselector output from Receiver to NT input on IFR RT POS T FOCUS HORIZ POS RTICL HORIZTL KHz / %x / DI MHz / DI... ms. K D. Hz I. D.. T I RSID IF CL CL PWRSTNDBYBTT SCOP/DM IF C RSID GND DC LOCK. FRQ RROR GN RF K K K UDIO LOCK NT / WTT MX SCN RF CHNNL.. FRQ. RROR DTMF 7 8 ND RCC DM CTCS STUP D FUNCT T PROG T SQ TRUNK TRCK CLL C MTR ST XC FILTRPGG URO / DCS T OUT DMOD XT MOD/SDDUPLX MIC/CC /W M X MX B. MOD RC DUP GN DUP GN STP NTR OLUM SQULCH MODULTI M SSB FM NR NR MID WID K K K K - - RF CL.K - - u T GNRTOR KHz TL R.K - dbm F..K WTTS G PK - -. UX PWR + m MTR KHz / %x BTT TST SIG DIST SD G N L L T/R - W MX RCIR T XT SYSTM RGULTOR POWR Figure -: Receiver RF Preselector Tuning DUPLX (out) port from IFR to RF on Rx The RF Preselector output is a small RF cable internal in the receiver that terminates in an SMB connector. The SMB plugs into J on the Receiver Mainboard. Disconnect the SMB cable from J and use the SMB-BNC adapter to connect this point to the NT input on the IFR as shown in Figure -7. J RF Preselector output Figure -7: Receiver RF Preselector Connection To NT input on IFR ppendix : IFR Test Procedures Page

12 MX MX MX MX K WTTS... MODULTI B T T 7 SIG- SD USB CNTL BUS D FRQUNCY (MHz) SQ. DISBL RF MD CND MODL # COD RF 8 OL XT FUNCTI 7 + MTR - MD CND MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS Set up the IFR as follows:. Set the IFR in TRCK LOW as described previously.. Set the MOD switch to DUP.. Set the RTICL to. (Khz/%x).. Set the HORIZTL to (MHz/DI).. Push the RF button on the keypad and input the Receiver RF frequency. nsure the receiver is turned on. The fi lter waveform will appear on the scope display. To tune the RF Preselector fi lter, remove the dust caps on the variable capacitors and, starting from the capacitor closest to the front panel of the receiver and moving back, tune the fi lter to its new frequency. Reference Oscillator djustment Connect the IFR and Codan Radio as shown in Figure -8. Synthesizer L.O. output from Receiver to NT input on IFR Computer running RSS RT POS T FOCUS HORIZ POS RTICL HORIZTL KHz / %x / DI MHz / DI... ms. K D. Hz I. D.. T I RSID IF CL CL PWRSTNDBYBTT SCOP/DM IF C RSID GND DC LOCK. FRQ RROR GN RF K K K UDIO LOCK NT / WTT MX SCN RF CHNNL.. FRQ. RROR DTMF 7 8 ND RCC DM CTCS STUP D FUNCT T PROG T SQ TRUNK TRCK CLL C MTR ST XC FILTRPGG URO / DCS T OUT DMOD XT MOD/SDDUPLX MIC/CC /W M X MX B. MOD RC DUP GN DUP GN STP NTR OLUM SQULCH MODULTI M SSB FM NR NR MID WID K K K K - - RF CL.K - - u T GNRTOR KHz TL R.K - dbm F..K WTTS G PK - -. UX PWR + m MTR KHz / %x BTT TST SIG DIST SD G N L L T/R - W MX RCIR T XT SYSTM RGULTOR POWR Figure -8: Receiver Reference Oscillator Testing USB from Computer to Rx Page ppendix : IFR Test Procedures

13 MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID The reference oscillator test on the receiver requires a connection directly into the Synthesizer, which uses an SMB connector. Disconnect the SMB cable from the LO output of the synthesizer and connect the small SMB-SMB cable to the SMB jack that is mounted on the Synthesizer (beneath the RF Preselector). The SMB-BNC adapter is required to connect this point to the NT input on the IFR as shown in Figure - (HF and UHF MHz Receiver) and - (UHF 7 / 8 / MHz Receiver). LO output of synthesizer SMB-SMB cable To NT input on IFR Figure -: HF and UHF MHz Receiver Reference Oscillator Connection LO output of synthesizer SMB-SMB cable Figure -: UHF 7 / 8 / MHz Receiver Reference Oscillator Connection To NT input on IFR ppendix : IFR Test Procedures Page

14 MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS Set up the IFR as follows:. Set the MOD switch to RC.. Push the RF button on the keypad and input the reference oscillator frequency (See Below).. Push ND FUNCT then MTR (PROG) on the keypad.. Set the FRQ RROR switch to RF KHz In the receiver RSS, enter the Service section and click on Ref Oscillator. The reference oscillator frequency is shown as the Target Synthesizer RF OUT. nter this RF frequency into the IFR. The receiver generates this frequency out of the Synthesizer into the IFR. Monitor the RF Frequency rror on the IFR. To change the reference frequency, adjust the softpot slider in the RSS as shown in Figure -. djust until the RF error is as close to Hz as possible. Click on the Program button to program in the new Reference Oscillator softpot value. Figure -: RSS Receiver Reference Oscillator lignment nter the L.O. Reference Oscillator Offset reading on the MT- Test Sheet. Page ppendix : IFR Test Procedures

15 MX MX MX MX K WTTS... MODULTI B T T 7 SIG- SD CNTL BUS RF MICMOD USB FRQUNCY (MHz) D MIC MD CND MODL # COD KY TX NLOG DIGITL RF OUT utohold FST MN MX LOGGG HOLD M MX RL STUP ac+dc db m db ac+dc m DIGITL MULTIMTR CNCL Hz % ms ns m S RNG F C m m ac+dc ac+dc IW CLR MM COM YS NO TMPRTUR FUNCTI OL MTR - XT MD CND MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID TRNSMITTR TSTG Connect the IFR and Codan Radio as shown in Figure -. xternal DM Connected to Tx Balanced udio Input LOCK. FRQ RROR GN RF K K K UDIO LOCK NT / WTT MX.. FRQ. RROR. MOD RC DUP GN DUP GN OLUM SQULCH MODULTI M SSB FM NR NR MID WID WTTS G PK MTR KHz / %x BTT TST SIG DIST SD Tx Balanced udio Input (to pins B8 and Z8) TRNSMITTR Computer running RSS SYSTM RGULTOR RT POS T FOCUS HORIZ POS RTICL HORIZTL KHz / %x / DI MHz / DI... ms. K D. Hz I. D.. T I RSID IF CL CL PWRSTNDBYBTT SCOP/DM IF C RSID GND DC DTMF 7 8 ND RCC DM CTCS STUP D FUNCT T PROG T SQ TRUNK TRCK CLL C MTR ST XC SCN RF CHNNL FILTRPGG URO / DCS STP T OUT DMOD XT MOD/SDDUPLX MIC/CC /W M X MX B NTR K K K K - - RF CL.K - - u T GNRTOR KHz TL R.K - dbm F..K UX PWR + m G N L L T/R - W MX T XT POWR T OUT USB from Computer to Tx T/R port from IFR to RF OUT on Tx Figure -: Transmitter Testing Set up the IFR as follows:. Set the MOD switch to RC.. Set the MODULTI switch to FM NR.. Set the RTICL to (Khz/%x).. Set the HORIZTL to (ms/di).. Push the RF button on the keypad and input the Transmitter RF frequency.. Push ND FUNCT then MTR (PROG) on the keypad. 7. On the T GNRTOR area turn the KHz tone (up). 8. djust the KHz variable level knob until the external DM meter reads -8. dbm (8 mrms). Set the MIC MOD switch on the front panel of the transmitter to nalog, and fl ip the other switch to KY TX (or set the switch to and key the transmitter through the RSS). ppendix : IFR Test Procedures Page

16 MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS udio Distortion If the transmitter has CTCSS encode (internal or external), temporarily reprogram the transmitter for no tone. Connect a jumper cable from DMOD (out) to XT MOD / SD (in). To check the transmitter distortion, set the MTR switch to DIST. If the IFR reads a much higher distortion than normal (eg. %), the internal demod level in the IFR may not be high enough for the distortion meter (this is more likely to occur in a narrowband transmitter). Increase the KHz variable level knob slightly until the distortion meter becomes active. nter the udio Distortion reading on the MT- Test Sheet. If the CTCSS tone was temporarily programmed for no tone, reprogram the internal or external setting. Disconnect the jumper cable from DMOD (out) to XT MOD / SD (in). RF Power To check the RF power output, set the MTR switch to WTTS G. In the Power Level area of the Service section on the RSS, click on the Key Tx button and adjust the Transmitter Output Power adjustment as shown in Figure - to change the RF output power. Transmitter RF power output will vary slightly with the dc input. Figure -: RSS Transmitter Power Level djustment nter the RF Power Output reading on the MT- Test Sheet. Connect the transmitter to the power amplifi er (if used) and measure the RF power output of the amplifi er. Do not exceed power amplifi er input levels. nter the mplifi er RF Power Output reading on the MT- Test Sheet. Page ppendix : IFR Test Procedures

17 MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID Reference Oscillator djustment To check the transmitter reference oscillator (frequency stability), set the FRQ RROR switch to RF KHz. In the transmitter RSS, enter the Service section and click on Ref Oscillator. The reference oscillator frequency is shown as the Target Frequency. nter this RF frequency into the IFR. Click on the Key Tx button and the transmitter will generate the reference frequency out of the RF output into the IFR. Monitor the RF Frequency rror on the IFR. To change the reference frequency, click on the Key Tx button and adjust the softpot slider in the RSS as shown in Figure -. djust until the RF error is as close to Hz as possible. Click on the Program button to program in the new Reference Oscillator softpot value. Figure -: RSS Transmitter Reference Oscillator lignment nter the Carrier Reference Oscillator Offset reading on the MT- Test Sheet. Deviation Level The deviation level adjustment is not required when connecting the transmitter in a repeater confi guration using LDS Serial Data. The audio level / deviation level adjustment can be done on both the Tx Balanced udio Input and the uxiliary Balanced Input ( and ). The uxiliary Balanced Input is only available on the C- Control Card or CI-BC- Base Control Card. Transmitter Balanced udio Input: Set up the IFR as follows:. Set the MTR switch to (Khz/%x).. Push ND FUNCT then MTR (PROG) on the keypad.. On the T GNRTOR area turn the KHz tone (up).. djust the KHz variable level knob until the external DM meter reads -8. dbm (8 mrms). ppendix : IFR Test Procedures Page

18 MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS If the transmitter has CTCSS encode (internal or external), temporarily reprogram the transmitter for no tone. nsure that the C- or CI-BC- Control Card is NOT plugged into the subrack.in the Deviation Levels area of the Service section on the RSS, click on the Key Tx button and adjust the Tx Balanced udio Input level adjustment as shown in Figure - until a deviation of +/-. KHz (narrowband) or +/-. KHz (wideband) is measured on the IFR. Figure -: RSS Transmitter udio Level djustment nter the Transmitter Deviation Level reading on the MT- Test Sheet. On the T GNRTOR area turn the KHz tone (down) and turn the R tone (up). Push T and enter. then NTR on the keypad. djust the R variable level knob until the external DM meter reads +. dbm (. rms) djust the audio frequency from Hz to Hz in increments of Hz using the keypad (push T and the RIGHT arrow key until the position is fl ashing, then use the UP arrow key) and check that the transmitter deviation does not rise above +/-. KHz (narrowband) or +/-. KHz (wideband). The MT- Transmitter will transmit a maximum deviation at an audio frequency of approximately Hz. nter the Transmitter Maximum Deviation Level reading on the MT- Test Sheet. uxiliary Balanced udio Input: To adjust the auxiliary balanced audio input, plug the C- Control Card or CI-BC- Base Control Card into the subrack using an extender card, and connect the T OUT on the IFR to the uxiliary Balanced audio input ( or ). uxiliary audio input is available on pins C and C, and uxiliary audio input is available on pins B and. nsure that NO external devices (eg. tone remote adapter or IP router) are connected to the auxiliary audio input. On the T GNRTOR area turn the KHz tone (up) and turn the R tone (down). djust the KHz variable level knob until the external DM meter reads. dbm (.77 rms). djust the uxiliary Balanced udio Input level adjustment (R for ux In, R for ux In ) for deviation of +/-. KHz (narrowband) or +/-. KHz (wideband). nter the uxiliary Deviation Level (if used) reading on the MT- Test Sheet. If the CTCSS tone was temporarily programmed for no tone, reprogram the internal or external setting. Page ppendix : IFR Test Procedures

19 MX MX MX MX K WTTS... MODULTI B T T 7 SIG- SD RF MICMOD USB CNTL BUS FRQUNCY (MHz) D MIC MD CND MODL # COD KY TX NLOG DIGITL RF OUT utohold FST MN MX LOGGG HOLD M MX RL STUP ac+dc db m db ac+dc m DIGITL MULTIMTR CNCL Hz % ms ns m S RNG F C m m ac+dc ac+dc IW CLR MM COM YS NO TMPRTUR FUNCTI OL MTR - XT MD CND MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID CTCSS Testing MT- Transmitters can be programmed, per channel, to generate CTCSS tones internally, or to allow for xternal Input of the CTCSS tones from another device (such as a tone-remote adapter). Connect the IFR and Codan Radio as shown in Figure -. The Tx Subtone input connection is only required when testing the xternal Input. If the internal programming is used to generate the CTCSS tone, disconnect the Tx Subtone input from the IFR. xternal DM Connected to Tx Subtone Input LOCK. FRQ RROR GN RF K K K UDIO LOCK NT / WTT MX.. FRQ. RROR. MOD RC DUP GN DUP GN OLUM SQULCH MODULTI M SSB FM NR NR MID WID WTTS G PK MTR KHz / %x BTT TST SIG DIST SD Tx Subtone Input (to pins B and Ground (B)) TRNSMITTR Computer running RSS SYSTM RGULTOR RT POS T FOCUS HORIZ POS RTICL HORIZTL KHz / %x / DI MHz / DI... ms. K D. Hz I. D.. T I RSID IF CL CL PWRSTNDBYBTT SCOP/DM IF C RSID GND DC DTMF 7 8 ND RCC DM CTCS STUP D FUNCT T PROG T SQ TRUNK TRCK CLL C MTR ST XC SCN RF CHNNL FILTRPGG URO / DCS STP T OUT DMOD XT MOD/SDDUPLX MIC/CC /W M X MX B NTR K K K K - - RF CL.K - - u T GNRTOR KHz TL R.K - dbm F..K UX PWR + m G N L L T/R - W MX T XT POWR T OUT Jumper cable from DMOD (out) to XT MOD / SD (in) T/R port from IFR to RF OUT on Tx USB from Computer to Tx Figure -: Transmitter CTCSS Testing Set the MIC MOD switch on the front panel of the transmitter to nalog, and fl ip the other switch to KY TX (or set the switch to and key the transmitter through the RSS). Set up the IFR as follows:. Set the MTR switch to (Khz/%x).. Set the RTICL to (Khz/%x).. Set the HORIZTL to T.. On the T GNRTOR area turn the KHz tone (down) and turn the R tone (up).. Push T and enter the CTCSS encode tone, then NTR on the keypad.. djust the R variable level knob until the external DM meter reads -8. dbm (.8 rms). 7. Push ND FUNCT then MTR (PROG) on the keypad. ppendix : IFR Test Procedures Page 7

20 MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS In the Subtone Levels area of the Service section on the RSS, click on the Key Tx button and adjust the Narrow and/or Wide Internal and/or xternal Subtone Deviation level adjustment as shown in Figure -7 until a deviation of +/-. KHz (narrowband) or +/-. KHz (wideband) is measured on the IFR. Figure -7: RSS Transmitter Subtone Deviation Level djustment If the CTCSS tone entered in the IFR is the same as the internally programmed CTCSS encode tone in the transmitter, a small stable oval shape will appear on the IFR scope (the oval shape may sometimes look like a straight line, simply re-enter the tone until a more oval shape appears). If a different tone was entered than the internally programmed CTCSS encode tone, the oval shape will fl uctuate or become distorted. nter the CTCSS ncode Deviation level reading on the MT- Test Sheet. Page 8 ppendix : IFR Test Procedures

21 MX MX MX MX K WTTS... MODULTI B T T 7 SIG- SD FRQUNCY (MHz) SWITCH SWITCH B RF D 7 7 KY TX MICMOD NLOG DIGITL TX USB RX TX B RX B PULL DOWN TO RMO CNTL BUS MIC MD CND MODL # COD USB RF OUT CNTL BUS D FRQUNCY (MHz) SQ. DISBL RF MD CND MODL # COD RF FUNCTI OL MTR - XT MD CND MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID SYSTM TSTG Some IFR models may not have the required duplex option installed. Push ND FUNCT then TRCK () on the keypad. Push the UP RROW key until DUPLX LOW appears on the display, then push the NTR key. If DUPLX LOW does not appear on the display, then the IFR does not have duplex capability. Connect the IFR and Codan Radio as shown in Figure -8: Computer running RSS LOCK NT / WTT MX... FRQ. RROR. OLUM SQULCH Codan RJ cables on front panel RT POS T FOCUS HORIZ POS RTICL HORIZTL KHz / %x / DI MHz / DI... ms. K D. Hz I. D.. T I RSID IF CL CL PWRSTNDBYBTT SCOP/DM IF C RSID GND DC FRQ RROR GN RF K K K UDIO LOCK DTMF 7 8 ND RCC DM CTCS STUP D FUNCT T PROG T SQ TRUNK TRCK CLL C MTR ST XC SCN RF CHNNL FILTRPGG URO / DCS MOD RC DUP GN DUP GN STP T OUT DMOD XT MOD/SDDUPLX MIC/CC /W M X MX B NTR MODULTI M SSB FM NR NR MID WID K K K K - - RF CL.K - - u T GNRTOR KHz TL R.K - dbm F..K WTTS G PK - -. UX PWR + m MTR KHz / %x BTT TST SIG DIST SD G N L L T/R - W MX RPTR CTROL TRNSMITTR RCIR To Tx or Rx T XT SYSTM RGULTOR POWR T/R port from IFR to RF OUT on Tx USB from Computer to Rx or Tx DUPLX (out) port from IFR to RF on Rx Figure -8: System Duplex Testing Set up the IFR as follows:. Set the IFR in DUPLX LOW as described previously.. Set the MODULTI switch to FM NR.. Set the MTR switch to (Khz/%x).. Push the RF button on the keypad and input the Transmitter RF frequency.. Push the ST button on the keypad and input the difference between the Receiver and Transmitter RF frequencies. If the Rx frequency is higher than the Tx frequency, the + sign should be shown, and the - sign if the Rx frequency is lower than the Tx frequency.. Push ND FUNCT then MTR (PROG) on the keypad. 7. Set the MOD switch to DUP GN. 8. On the T GNRTOR area turn the KHz tone (up).. djust the KHz variable level knob until the meter reads +/- % maximum deviation (+/-. KHz (narrowband) or +/-. KHz (wideband)). ppendix : IFR Test Procedures Page

22 MTNNC GUID MT- NLOG & P DIGITL RDIO SYSTMS nter the correct CTCSS tone (if used) and deviation level for the tone.. On the T GNRTOR area turn the KHz tone (down) and turn the R tone (up).. Push T and enter the CTCSS decode tone, then NTR on the keypad.. Push ND FUNCT then MTR (PROG) on the keypad.. djust the R variable level knob until the meter reads a deviation of +/-. KHz (narrowband) or +/-. KHz (wideband).. On the T GNRTOR area turn the KHz tone (up).. Set the MOD switch to DUP. Set the receiver and transmitter front panel switch to. The MIC MOD switch on the transmitter front panel can be set to either Digital or nalog (this test does not make use of the front panel switch). nsure that the receiver and transmitter are connected to the repeater controller via the RJ cables on the front panel (In some systems, the Rx and Tx may be connected directly together using the RJ cables). Distortion If the transmitter has CTCSS encode (internal or external), temporarily reprogram the transmitter for no tone. Connect a jumper cable from DMOD (out) to XT MOD / SD (in). To check the repeater system distortion, set the MTR switch to DIST. If the IFR reads a much higher distortion than normal (eg. %), the internal demod level in the IFR may not be high enough for the distortion meter (this is more likely to occur in a narrowband transmitter). Increase the KHz variable level knob slightly until the distortion meter becomes active. nter the System Distortion reading on the MT- Test Sheet. If the CTCSS tone was temporarily programmed for no tone, reprogram the internal or external setting. Disconnect the jumper cable from DMOD (out) to XT MOD / SD (in). Page ppendix : IFR Test Procedures

23 MT- NLOG & P DIGITL RDIO SYSTMS MTNNC GUID Deviation Level If the transmitter has CTCSS encode (internal or external), temporarily reprogram the transmitter for no tone. To check the repeater deviation level, set the MTR switch to (Khz/%x). Ideally the deviation level out of the transmitter should match the input to the receiver. The repeater deviation level matching is adjusted by the analog LDS level adjustment that is available in both the receiver and transmitter (only one needs to be adjusted). In the receiver or transmitter RSS, enter the Service section and click on LDS Level. default value of on the softpot slider should be close to matching receiver and transmitter deviation levels, however minor adjustments can be made. djust the softpot slider in the RSS as shown in Figure - until a deviation of +/-. KHz (narrowband) or +/-. KHz (wideband) is measured on the IFR. Figure -: RSS Receiver or Transmitter nalog LDS Level djustment nter the Repeat Deviation Level reading on the MT- Test Sheet. If the CTCSS tone was temporarily programmed for no tone, reprogram the internal or external setting. ppendix : IFR Test Procedures Page

24 Codan Radio Communications rie Street, ictoria, BC Canada, 8 P8 LMRsales@codanradio.com Toll Free Canada and US Phone: -8-- Fax: International Phone: Fax: -8- Codan Limited ll Rights Reserved. MG----