Codan-radio MT-4E Analog and P25 Digital - Maintenance Guide Manuale Utente Scaricare il pdf (Pagina 54)

MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS

Chapter 5: Codan Radio System TestingPage 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

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Codan-radio MT-4E Analog and P25 Digital - Maintenance Guide Manuale Utente Pagina 54