Service Manual Part 1
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If required, the mute setting can be adjusted internally as follows.
Align the receiver, as described in Section 6.5.1.
Adjust RV153 fully clockwise.
Set the signal generator to the required receive frequency.
Set the modulation for ±3kHz (±2.4kHz) [±1.5kHz] deviation at 1kHz AF.
Adjust the signal generator output for 11dB sinad.
Adjust RV153 so that the radio mutes then turn RV153 until the mute gate just
opens.
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The T2000 RSSI is non-adjustable and should operate over an approximate 50dB
range.
Monitor the RSSI output on pin 15 of S14 on the logic PCB.
Set the signal generator to the required receive frequency with modulation set for
±3kHz (±2.4kHz) [±1.5kHz] deviation at 1kHz AF and an output level of -70dBm.
Decrease the signal generator output in 10dB steps to -120dBm, noting the RSSI
output at each step.
The RSSI should have a typical slope of approximately 540mV/10dB, from
-120dBm to -70dBm RF input.
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These levels are factory set at the time of manufacture and will require reprogram-
ming only if the receiver has been realigned or has had parts replaced, or if the
logic PCB has been replaced.
Set the signal generator to give an unmodulated RF signal in the centre of the
trunking band.
Enter test mode.
A The T203X will need to use CCTM, as described in Section 5.8.3.
Set the signal generator to -108dBm and program ‘L1’ (function 61), as described
in Section 5.8.5.2.
Set the signal generator to -100dBm and program ‘L2’ (function 62), as described
in Section 5.8.5.2.