Motorola VRS750 Service Manual page 25

VRS750 Global Tuner
NOTE: The Receive PL filter internal to the VRS is a low pass
filter with a -3 dB point of approximately 170 Hz. As a
result, the PLs greater than 170 Hz will be attenuated
to allow for a decreased decode sensitivity. The higher
the PL frequency the greater the attenuation. The
Emergency, Message, and Status features of the VRS are
best suited for use with these higher PL frequencies.
Figure 12. VRS-EP Mode Steering Window
Due to Host memory considerations, the maximum number of Zones
allowed to be accessed by the VRS Mode Steering window is 20. Any
Zone number greater than 20 will not be allowed in this window but
is allowed for normal radio operation.
The Tuner for Professional Radios (Global Tuner) can be used to adjust
the VRS750's Transmitter Output Power and Receiver Squelch Settings
while in Normal Mode (see Table 6 in Chapter 6). In order to program
the VRS750 using the Global Tuner it should be connected to the
mobile and to a PC via its COM port as indicated in Figure 13.
VRS750
VRS750 TO MOBILE CABLE
Figure 13. VRS Connection to the PC
SRIB
CONNECT TO THE PCs
ASTRO MOBILE
COM PORT
13