Grecom PSR-310 Owner's Manual page 29

depending on the type of trunked radio system you plan to monitor. If you
are a reasonably experienced user you probably already know what the
essential parameters are for the system you wish to monitor. For example,
each TSYS must correctly specify the type of system being monitored, the
control channel or LCN frequencies used by the system, and so on. A de-
tailed description of each type of system supported by this radio and the
essential parameters required to make the different types of trunked radio
systems work properly is provided in the Detailed Menu Reference. So, if all
of this makes sense to you then you should proceed and enter the required
data for the system you wish to monitor to make a new TSYS as you create
your TGRP . If not, please refer to the TGRP section of the Detailed Menu Ref-
erence so that you will understand which TSYS parameters are required for
the type of trunked radio system you wish to monitor.
The first time you make a TGRP for a particular trunked radio system, you
must also create a TSYS that contains the system parameters associated
with that trunked radio system. Once you create a TSYS object for the
trunked radio system, you can use the TSYS object over and over again
without having to re-enter all of the system data.
Assuming that you have already entered one or more CONV objects (which
we recommend you do prior to attempting the entry of the slightly more
complicated TGRP object), you should press the PGM key to place your
scanner into Program Mode, then press the NEW softkey, then press the
TGRP softkey. Your radio display should appear as follows:
In the same way as with the CONV object, this menu of TGRP parameters
can be scrolled up and down to access and enter or change the various pa-
rameters associated with a trunking talkgroup.
For the purpose of this example, we will assume that you wish to create a
TGRP object for a Motorola Type II 800 MHz trunked radio system, which
is one of the more common types of trunked radio systems in use. (If this
is not the case, we encourage you to refer to the Detailed Menu Reference
section of this manual for more information that applies to the type of TSYS
you wish to monitor.)
Scroll the display by pressing the down arrow once so that the flashing cur-
sor is highlighting the TSYS field, then press the SEL key in the center of the
5-way pushbutton pad. Your radio's display should appear as follows:
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