Manualshelf

User Manual

ManualsBrandsCalAmp Wireless Networks ManualsElectronicsT-96SR Telemetry Transceiver/Modem
41424344454647484950
ALIGNMENT PROCEDURE
6-5
Part No. 001-3422-003
9. Adjust the frequency displayed on the Modulation Analyzer to the desired channel frequency by adjusting the
TCXO (Y801).
6.6.1 MODULATION ADJUSTMENT
1. Apply a 1V p-p, 100 Hz, 2.5V DC bias, square wave to J201, pin 6.
2. Transmit into the modulation analyzer and observe modulation output on the oscilloscope. The modulation
analyzer should not have any high pass filtering selected and no less than a 15 kHz low pass filter.
3. Select a Transmit channel frequency in the MIDDLE of the band. The DAC value should be "125" (the voltage
at the wiper of R827 should be set to 1.5V DC).
4. If the square wave is rolled off on the edges, adjust R825 up in value for the flattest square wave.
5. If the square wave is peaked on the edges, adjust R825 down in value for the flattest square wave.
6. Adjust the Modulation Adjust DAC (DAC2) for the flattest square wave.
7. Repeat Step 6 for channels on the LOW and HIGH ends of the band.
8. Input a 100 Hz, 2.5V DC bias, sinewave to J201, pin 6. The modulation analyzer should still have the 15 kHz
low pass filter selected.
9. Adjust the audio analyzer output level to achieve a transmit deviation of:
1.5 kHz for 15 kHz radios or 3 kHz for 30 kHz radios.
10.Select a Transmit channel frequency at the LOW end of the band.
11.Input a 100 Hz, +2.5V DC biased, sine-wave and set a 0 dB reference on the Modulation Analyzer.
12.Apply a 1 kHz, +2.5V DC biased, sine-wave. The level should be within ±0.5 dB of the reference at 100 Hz.
13.Select a Transmit channel frequency in the MIDDLE of the band.
14.Input a 100 Hz, +2.5V DC biased, sine-wave and set a 0 dB reference on the Modulation Analyzer.
15.Apply a 1 kHz, +2.5V DC biased, sine-wave. The level should be within ±0.5 dB of the reference at 100 Hz.
16. Select a Transmit channel frequency in the HIGH end of the band.
17.Input a 100 Hz, +2.5V DC biased, sine-wave and set a 0 dB reference on the Modulation Analyzer.
18.Apply a 1 kHz, +2.5V DC biased, sine-wave. The level should be within ±0.5 dB of the reference at 100 Hz.
19.Unkey the transmitter.