31/01/96
Copyright TEL
4.7
Noise Mute (If Linked In)
Rotate the front panel mute pot. (RV100) fully anticlockwise.
Apply an on-channel signal from the RF generator at a level of -110dBm with
3kHz deviation [1.5kHz] at 1kHz.
Increase the RF level in 1dB steps, checking that the mute opens for an RF input
level of approximately -105dBm.
Turn the RF off and check that the mute closes.
Rotate the mute pot. clockwise and check that the mute opens.
Reset the mute pot. to give the required opening sinad.
4.8
RSSI
Apply an on-channel signal from the RF generator at a level of -100dBm with
3kHz deviation [1.5kHz] at 1kHz.
Using a high impedance DMM, check that the RSSI output voltage on pin 5 of the
rear D-range connector is 4.5V (nominal).
Vary the RF level in 5dB steps and check that the RSSI output voltage changes at a
rate of approximately 15dB/V over the range of -115dBm to -70dBm (refer to Fig-
ure 4.2 for RSSI voltage vs signal strength).
Figure 4.2 RSSI Voltage vs Signal Strength
RF Level (dBm)
-130
-120
-110
-100
-90
-80
-70
-60
1
2
3
4
5
6
7
8
RSSI V
oltage
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