User's Manual

Much like the other object types, there are only a few parameters that are essential in order for a search
range to function correctly. The FrLO: and FrHi: lower and upper frequency limits must be specified, so the
scanner will know where to begin the search, and where to end the search and start again. The Mode: must
be set properly, although by default the scanner will automatically choose the receive mode that most likely
applies to the active frequency as the search proceeds. And again, we recommend that you give the LMIT
object a name in the Tag: field so that you can easily find or identify it later.
To create a new LMIT object, press PGM to place your scanner into Program Mode, then press the NEW
softkey, then press the SRCH softkey to view the available Search types, then press the LMIT softkey. Use
the data entry methods you have already learned for CONV and TGRP object setup to specify the FrLO:
and FrHi: limits, and provide a name for your search in the Tag: field. When finished, press the Save softkey
to store your LMIT search as a new object.
Once your LMIT object is saved, you can use it while scanning, or launch the LMIT search by itself by
pressing the SRCH softkey (note that we are referring to the SRCH softkey, and not the SRCH key on the
keypad) after navigating to the LMIT object in Manual Mode.
When the LMIT search stops on an active frequency, the display will appear as follows:
illust
Press the PSE key to hold on the active frequency. To resume, press the PSE key again.
HINT: It can take some time for the PSR-310 to process all of the frequencies in a LMIT search. You can
experiment with different size frequency ranges to find a LMIT search setup that does not interfere
excessively with scanning of other object types.
Spectrum Sweeper Object (SWPR)
A Spectrum Sweeper Object (SWPR) is a record that stores the parameters necessary for the radio to
rapidly sweep a range of frequencies for strong signals from nearby transmitters. A SWPR object can be
used for standalone operation - the radio just sweeps and stops when activity is detected, or for sweeping
that is performed while the radio is scanning. The radio treats SWPR objects just like any other Scannable
Object when in Scan Mode. If you create a SWPR object, assign it to a Scan List and press the SCAN key,
the radio will check for activity on all the enabled Scannable Objects - TGRP objects, CONV objects, LMIT
objects and SWPR objects. An example of when this might be handy would be when you want to scan for
activity on a collection of TGRP and CONV objects, then do a quick sweep for transmissions from nearby
transmitters.