MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS
Chapter 5: Codan Radio System Testing
Page 46
FGEN1 is confi gured to inject a 1.0 KHz tone at -8.0 dBm (0.308 Vrms) into the transmitter balanced
input. A continuous tone injected into the transmitter will be demodulated as a “fl uctuating” audio
level and tone. This is inherent in all P25 radio systems. Optionally, a microphone can be connected
to the front panel of the transmitter and the tester can speak into the microphone and listen to the
demodulated audio on the IFR 2975.
Ensure the correct NAC, TGID and Unit ID are being transmitted properly as shown in Figure 5-32.
The NAC, TGID and Unit ID are all programmed into the transmitter via the RSS. There are no specifi c
measurements to make on this test, just verify that the transmitter is operating.
Figure 5-32: Transmitter Digital Check
Summary of Contents for MT-4E
Page 1: ...www codancomms com MT 4E Analog and P25 Digital Radio Systems MAINTENANCE GUIDE...
Page 2: ......
Page 75: ......
