Motorola Gm1200e 68p64115b12 Manual
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GM1200E Tuning Procedure Radio Tuning Procedure4-5 4.Select the first test frequency shown, and set the corresponding value to the start value shown in table 4-4. 5.Set the RF test generator to the receive test frequency, and set the RF level to 10mV modulated with a 1 kHz tone at the normal test deviation shown in table 4-3. 6.Measure the RSSI voltage at accessory connector pin 15 with a dc voltmeter capable of 1 mV resolution. 7.Change the softpot value by the stepsize shown in table 4-4 and note the RSSI voltage.The target softpot value is achieved when the measured RSSI voltage change between step 6 and step 7 is lower than the tuning target for the first time. The tuning target, shown in table 4-4, is expressed as the percentage of the measured RSSI voltage and must be recalculated for every tuning step. If the measured RSSI voltage decreases before the target value has been achieved, approximation should be stopped and the current softpot value should be used as target value. Set test box (GTF180) audio switch to the “SPKR” position. The 1 kHz tone must be audible at the target value to make sure the radio is receiving. 8.Repeat steps 4 - 7 for all test frequencies shown in the window. 9.Click the Program button to store the softpot values. 1.7Rated Volume The rated volume softpot sets the volume at normal test modulation. 1.Set test box (GTF180) meter selection switch to the “AUDIO PA” position and the speaker load switch to the MAXAR position. Connect an AC voltmeter to the test box meter port. 2.From the Service menu, select Receiver Alignment. 3.Select Rated Volume to open the rated volume tuning window. The screen will indicate the receive test frequency to be used. 4.Set the RF test generator to the receive test frequency, and set the RF level to 1mVolt modulated with a 1 kHz tone at the normal test deviation shown in table 4-3. Set test box (GTF180) audio switch to the “SPKR” position. The 1 kHz tone must be audible to make sure the radio is receiving. 5.Adjust the value of the softpot to obtain rated audio volume (as close to 3.87 Vrms). Note:The voltage at the meter port of the testbox GTF180 is only half the voltage at the speaker. 6.Click the Program button to store the softpot value. Table 4-3 Normal Test Deviation. Channel SpacingDeviation 12.5 kHz 20 kHz 25 kHz1.5 kHz 2.4 kHz 3 kHz Table 4-4 Start Value for Front-End Pre-selector Tuning. RF-BandTargetStepsizeStart Value UHF VHF 300-350MHz 336-390MHz0.42% 0.5% 0.84% 0.31%-2 +2 -2 -2Maximum Minimum Maximum Maximum
GM1200E Tuning Procedure 4-6Radio Tuning Procedure 1.8Squelch The squelch softpots set the signal to noise ratio at which the squelch opens. The squelch value needs to be set at 7 frequencies across the frequency range. 1.Set the test box (GTF180) meter selection switch to the Audio PA position and connect a SINAD meter to the METER port. 2.From the Service menu, select Receiver Alignment. 3.Select Squelch Attenuation to open the squelch attenuation tuning window. The window will indicate the receive test frequencies to be used. 4.Select the first test frequency shown, and set the corresponding value to 0. 5.Set the RF test generator to the test frequency and modulate the signal generator at the normal test deviation shown in table 4-3, with 1 kHz tone. Adjust the generator for a 8-10 dB SINAD level (weighted with psophometric filter). 6.Adjust the softpot value until the squelch just closes. 7.Monitor for squelch chatter; if chatter is present, repeat step 6. 8.When no chatter is detected, select the next softpot and repeat steps 4 - 7 for all test frequencies shown in the window. 9.Click the Program button to store the softpot values. 1.9Transmit Voltage Limit The transmit control voltage limit softpot sets the maximum power control voltage. All 7 voltage limit softpots are tuned and programmed automatically when the Program button is clicked. 1.From the Service menu, select Transmitter Alignment. 2.Select Voltage Limit to open the voltage limit tuning window. 3.Set the Power Factor to 1.3. 4.Click the Program button to store the softpot values. 1.10Transmit Deviation Balance (Compensation) Compensation alignment balances the modulation sensitivity of the VCO and reference modulation (synthesiser low frequency port) lines. Compensation algorithm is critical to the operation of signalling schemes that have very low frequency components (e.g. DPL) and could result in distorted waveforms if improperly adjusted. The compensation value needs to be set at 7 frequencies across the frequency range. 1.From the Service menu, select Transmitter Alignment. 2.Select Modulation Attenuation to open the deviation balance tuning window. The window will indicate the transmit test frequencies to be used. 3.Set the Test Box (GTF180) meter selector switch to the “GEN” position, and inject a 80 Hz tone at 200 mVrms into the Audio In port. (The deviation measured at step 6 should be about 1-4kHz.) Connect an AC meter to the meter port to insure the proper input signal level. 4.Select the first test frequency shown in the window. 5.Click Toggle PTT to key the radio. The status bar will indicate that the radio is transmitting. 6.Measure the transmitter deviation.
GM1200E Tuning Procedure Radio Tuning Procedure4-7 7.Change the input tone to 3 kHz, 200 mVrms. 8.Adjust the deviation to within ±2% of the value recorded in step 6. 9.Check the deviation at 80 Hz again and repeat step 7-8, if it has changed since step 6. 10.Click the Toggle PTT to dekey the radio. 11.Repeat steps 3 - 10 for the remaining test frequencies. 12.Click the Program button to store the softpot values. Note:The step size change for step 8 is approximately 2.5% softpot value. 1.11Transmit Deviation Limit The transmit deviation limit softpot sets the maximum deviation of the carrier. The deviation value needs to be set at 7 frequencies across the frequency range. 1.From the Service menu, select Transmitter Alignment. 2.Select Reference Attenuation to open the reference attenuation tuning window. 3.Set the maximum value and press Program to store the softpot value. 4.From the Service menu, select Transmitter Alignment. 5.Select VCO Attenuation to open the deviation limit tuning window. The window will indicate the transmit test frequencies to be used. 6.Set the Test Box (GTF180) meter selector switch to the “GEN” position, and inject a 1 kHz tone at 800 mVrms into the Audio In port. Connect an AC meter to the meter port to ensure the proper input signal level. 7.Select the first test frequency shown in the window. 8.Click the Toggle PTT to key the radio. The status bar will indicate that the radio is transmitting. 9.Adjust the transmitter deviation to the value shown in table 4-5. 10.Click the Toggle PTT to dekey the radio. 11.Repeat steps 8 - 10 for the remaining test frequencies. 12.Click the Program button to store the softpot values. 1.12Signalling Alignments 1.12.1MPT RSSI Threshold Level The Program buttons must only be activated when the required signal is input to the radio and the radio is receiving. If the DPS detects that the input signal is not within the expected range for the RSSI level in question then a message will be displayed to warn that the radio may not be set up correctly for the alignment operation.Table 4-5 Transmitter Deviation Channel SpacingDeviation 12.5 kHz2.2-2.3 kHz 20 kHz3.4-3.6 kHz 25 kHz4.3-4.6 kHz
GM1200E Tuning Procedure 4-8Radio Tuning Procedure 1.Set test box (GTF180) meter selection switch to the “AUDIO PA” position and the speaker load switch to the MAXAR position. 2.From the Service menu, select Receiver Alignment. 3.Select RSSI to open the RSSI tuning window. The screen will indicate the receive test frequency to be used. The softpot values are displayed for information only and cannot be edited. 4.Set the RF test generator to the receive test frequency, and set the RF level to the value indicated for RSSI Level 0, modulated with a 1 kHz tone at the normal test deviation shown in table 4-3. Set test box (GTF180) audio switch to the “SPKR” position. The 1 kHz tone must be audible to make sure the radio is receiving. 5.Click the Program button to store the softpot value for RSSI Level 0. 6.Repeat steps 4 - 5 for the remaining RSSI levels. 7.Click the Cancel button to close the window. 1.12.2MPT1327 Transmit Deviation / DTMF Transmit Deviation The MPT1327 Deviation Softpot is used to tune the FFSK signalling deviation. Tuning is performed at one frequency. The radio generates an alternating bit pattern for tuning. Values for other frequencies are calculated by the radio software. The DTMF Deviation Softpot is used to tune the DTMF signalling deviation. Tuning is performed at one frequency. The radio generates a DTMF signal for tuning. Values for other frequencies are calculated by the radio software. 1.From the Service menu, select Transmitter Alignment. 2.Select Signalling Deviation to open the signalling deviation tuning window. 3.Select the MPT value and click the Toggle PTT to key the radio. The status bar will indicate that the radio is transmitting. 4.Adjust the transmitter deviation to the value shown in table 4-6. 5.Click the Toggle PTT to dekey the radio. 6.Repeat steps 3 - 5 for DTMF deviation. 7.Click the Program button to store the softpot value. Table 4-6 Signalling Deviation Channel SpacingMPT 1327Deviation 12.5 kHz1.4-1.6 kHz1.5-1.8 kHz 20 kHz2.2-2.6 kHz2.4-2.8 kHz 25 kHz2.8-3.2 kHz3.0-3.4 kHz CAUTION:Inadvertant use of the program buttons may result in radio failure.
PL (CTCSS) CodesA-i Appendix A Table of Contents Table of Contents PL/DPL Codes ParagraphPage 1.0PL Codes and Digital PL (DPL) Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.1PL Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.2Digital PL (DPL) Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
PL Codes and Digital PL (DPL) Codes PL (CTCSS) CodesA-1 1.0PL Codes and Digital PL (DPL) Codes The following have been tested and are acceptable for programming into any transmit or receive frequency. 1.1PL Codes 1.2Digital PL (DPL) Codes: GROUP AGROUP BGROUP C CodeFreqCodeFreqCodeFreq XZ XB YB 1Z 1B 2A 3Z 3B 4A 5Z 6A 7Z M1 M367.0 77.0 88.5 100.0 107.2 114.8 123.0 131.8 141.3 151.4 173.8 186.2 203.5 218.1XA YZ ZA 1A 2Z 2B 3A 4Z 4B 5A 6Z 6B 7A M271.9 82.5 94.8 103.5 110.0 118.8 127.3 136.5 146.2 156.7 167.9 179.9 192.8 210.7WZ WA WB YA ZZ ZB 5B 8Z69.3 74.4 79.7 85.4 91.5 97.4 162.2 206.5 023 043 071 116 143 165 225 251 266 325 356 413 452 466 532 627 703 743025 047 072 122 145 172 226 252 271 331 364 423 454 503 546 631 712 754026 051 073 125 152 174 243 255 274 332 365 431 455 506 565 632 723031 053 074 131 155 205 244 261 306 343 371 432 462 516 606 654 731032 054 114 132 156 212 245 263 311 346 411 445 464 523 612 662 732036 065 115 134 162 223 246 265 315 351 412 446 465 526 624 664 734
PL Codes and Digital PL (DPL) Codes A-2PL (CTCSS) Codes
NPD Application NotesB-i Appendix B NPD Application Notes Table of Contents Table of Contents ParagraphPage 1.0Non Prescribed Data (NPD) Calls............................................................. 1 2.0Calls with DTE connected to External Data Connector (Radio Accessory Connector).................................................................. 1 2.1DTE Initiated Call (Outgoing Calls).............................................................. 1 2.2Calls Initiated by another Radio Unit (Incoming Calls)................................ 1 3.0Calls with DTE connected to Internal Data Connector (Radio Option Connector)......................................................................... 1 3.1DTE Initiated Call (Outgoing Calls).............................................................. 1 3.2Calls Initiated by another Radio Unit (Incoming Calls)................................ 2 4.0Other Calls.................................................................................................. 2 4.1Voice Calls................................................................................................... 2 4.2Status Calls.................................................................................................. 2 4.3Mixed Calls.................................................................................................. 2