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These networked trunked radio systems work in a manner that is
very similar to a cellular telephone network. As a system user
moves around (or "roams") in the coverage area of the network,
their radio will automatically find and use the nearest tower site.
Each tower site includes a number of channels. One of these
channels is used for control channel data, and the remaining
channels are used for voice traffic. As a user moves away from
the coverage of one site, their radio will search other control
channel frequencies for a better site to use.
Your PSR-500 includes a Multi-site feature that can enhance the
operation of the scanner when monitoring Multi-site systems.
Multi-site can be enabled by editing the trunking system (TSYS)
parameters for a Motorola or P25 system. Multi-site can be set to
Off, Stat(Stationary) or Roam. By default, Multi-site is set to OFF.
The ROAM setting is ideal for those times when you are driving
around in the service area of a networked trunked radio system,
as it allows the radio to find and use the best tower sites as you
move in and out of the coverage footprints of different sites. The
STAT(ionary) setting is ideal for those times when you are not
moving and are within range of more than one tower site, as it
will allow you to monitor traffic from any tower that you are within
range of.
To activate Multi-site mode on a Motorola or P25 networked
system, follow these steps:
PGM
Press
, then navigate to a talkgroup on the networked multi-
site system using the keys.
Press the EDIT softkey, then press the CURR softkey.
SEL
Scroll down to the TSYS item and press the
key to edit the
TSYS parameters.
Scroll to Multi-Site. Use the keys to select Off, Stat
or Roam. When set to Off, the scanner will find the first usable
control channel in the control channel list and use it until it is no
longer usable. When set to Stat(ionary), the scanner will track
the system using any control channel in the list that is usable.
When set to Roam, the scanner will attempt to locate and use the
best possible control channel and ignore others, until the control
channel is no longer usable, then it will locate a new "best control
channel" to use. When Multi-Site=ROAM, the scanner will
always attempt to lock on to control channels where the
decoding quality is greater than the Threshold Hi setting, and will
PSR-500 User Manual
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