Radio Shack ADV0801 Owner's Manual page 6

ADV0801 Owner's Manual Draft
As you begin to use your new scanner, you will notice that the object names are abbreviated so
that they can easily fit into the 16 character LCD. (Imagine what the radio's display would look
like if "Trunking Talkgroup Object" was spelled out in its entirety every time it was necessary to
show it in the display.)
You should take a moment and become familiar with these abbreviations now. For consistency,
the same abbreviations for the different object types are used in the radio and here in the
manual.
TGRP
TGRP is used to represent a Trunking Talkgroup Object. Trunking Talkgroups are "virtual"
channels that exist on a trunked radio system. A trunked radio system is a radio system where
a small group of radio channels are automatically shared between a larger number of users and
user groups. This sharing of channels is managed automatically by a special computer, called a
controller, or by other specialized hardware. For now, all you need to know is this; if you want to
monitor a talkgroup on a trunked radio system, you must store that talkgroup's parameters in a
TGRP object.
TSYS
TSYS is used to represent a Trunking System Object. A TSYS is a special object type that is
used when creating TGRP objects. A trunking talkgroup must be associated with a specific
trunked radio system in order for it to operate. There are parameters that are associated with
trunking systems, such as the type of trunked radio system technology used, the frequencies
that the system uses to broadcast control data, etc. Instead of entering these parameters over
and over again every time you create a new TGRP on the same trunked radio system, you create
a TSYS object with all of the system parameters, then specify that TSYS object for each TGRP
you create on the same trunked radio system. A TSYS cannot be scanned by itself and is not
considered a Scannable Object. It is a "configuration object" that can be used over and over
again when adding talkgroups for a specified trunked radio system.
CONV
CONV is used to represent a Conventional Channel Object. A Conventional Channel Object is a
regular, non-trunked frequency used for radio communications. CONV objects are used to store
the parameters for any radio channel that is not a part of a trunked system. For example, if you
want to monitor specific VHF marine channels, they should be programmed as CONV objects. If
you want to monitor your favorite amateur radio channel, it should be stored as a CONV object.
If your police or fire department uses a channel, or channels that are not trunked, but part of a
"plain old radio system", they should be stored as CONV objects.
LMIT
LMIT is used to represent a Search Range, or Limit Search Object. LMIT objects contain the
parameters necessary for the radio to search a range of individual frequencies between a lower
and upper limit frequency.
Page 6