Radio Shack ADV0801 Owner's Manual page 36

ADV0801 Owner's Manual Draft
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 ADV0801 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:
Press PGM, then navigate to a talkgroup on the networked multi-site system using the < > ^ v
keys.
Press the EDIT softkey, then press the CURR softkey.
Scroll down to the TSYS item and press the SEL 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 search for new control channels when the decoding quality of a
control channel drops below Threshold Lo setting, and, if no new control channels are available
that meet the Threshold Hi criteria, the scanner will seek the best control channel to use, and
continue checking periodically for a new control channel that meets the Threshold Hi criteria.
When Multi-Site=STAT, the scanner will track the system using every usable control channel in
the control channel list.
Press the SAVE softkey to save your changes to the TSYS parameters, then press the SAVE
softkey again to use the scanner.
You should experiment with the different Multi-site modes and the threshold settings to find a
combination that works best for your location. Keep in mind that the threshold settings are only
available when Multi-Site Roam is selected.
Multi-site functionality is not available in EDACS or LTR trunking.
NOTE: It may be necessary to change the values used for Threshold Hi and Threshold Low in
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