Motorola XTS 2500 Service Manual page 514

7.5-38
7.5.37TX Audio 1 kHz Tone
Trace 1: TP203 Mod In (640 mVp-p 1 kHz tone 1.5 Vdc)
Trace 2: U202, pin 1 (620 mVp-p 1 kHz tone)
Trace 3: FL200, pin 8 (1.2 MHz square wave 0 to 3 V)
Note: Transmit audio 1 kHz tone, which provides 3 kHz deviation.
February 14, 2012
Troubleshooting Waveforms: TX Audio 1 kHz Tone
6816985H01-F