User's Manual

To adjust the Receiver Squelch select RX Align->Squelch Attn.->(Select the Squelch
Attn. for the channel spacing selected in the VRS Personality) (see Figure 14). The
Receiver Squelch should be set at the factory to a tight setting. To obtain better
performance from the VRS750 the Squelch softpot setting can be reduced, but if it is
reduced too much the VRS750 will enter a monitor state and will not activate. Most
settings should be above 30. Once the softpots have been set to achieve the desired
squelch level click on the program button and close the Squelch Attn. window by using
the X in the top right corner. At this point the mobile radio will reset. After the reset is
complete select File->Program All. This will program all adjusted softpots values into
the VRS750’s EEPROM.
Note: We recommend that the Receiver Squelch be adjusted only if the VRS Tx Squelch
Type is set to CSQ. Otherwise, the Tx PL Self-Clearing feature may not work properly.
Figure 14 Squelch Attenuation Window in the Global Tuner