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display mode selected, the system number is replaced
by dashes and likewise for the group number when
group scanning is occurring.
When the alpha tag display mode is selected,
group scanning is indicated by "GRP SCAN" in the
display, and system scanning is indicated by "SYS
SCAN". The monitor mode must be disabled for
scanning to occur (see Section 2.11.2).
2.6.3 SCAN TYPES
The type of scanning selected is determined by
the menu mode SCN TYPE parameter (see Section
2.5.2). If this parameter is not selectable, the scan type
is fixed by programming. The available scan types are
as follows.
SYSTEMS - Both system and group scanning
GROUPS - Group scanning only
OFF - Both types disabled (scanning not selectable)
If the SCN TYPE menu parameter is disabled, the
programmed default scan type is always selected. The
selected system and group can be changed while scan-
ning using the SYS and GRP keys in the normal
manner. Scanning resumes shortly after the change is
made.
When a call is received in the scan mode, the
display changes to the system and group of the call.
Programming determines if this change is temporary
or permanent, and if a response occurs on the system/
group of the call or the selected system/group. Refer to
Section 2.6.10 for more information.
2.6.4 LTR-NET MODE SCANNING
If an LTR-Net system is selected and both
roaming and system scan are enabled, registration on
other localities can occur and the only systems
scanned are LTR-Net systems that are in the scan list
and programmed for the current locality.
However, if no LTR-Net locality could be located
during locality search, LTR and conventional systems
that are in the scan list are also scanned. If a signal is
detected on one of those systems, the transceiver
moves to it. However, searching continues for a
programmed LTR-Net locality, and when one is
detected, registration on that site occurs and only LTR-
Net systems are again scanned. This operation can
provide uninterrupted operation when traveling
through areas which have not yet been converted to
LTR-Net operation.
Other scan operation in this mode is as follows:
•
If Roaming = Off and System Scan = On with an
LTR-Net system selected, LTR-Net systems that are
in the scan list and programmed for the current
locality are scanned and LTR and conventional
systems are never scanned.
•
If Roaming = On and System Scan = Off with an
LTR-Net system selected, registration on other
LTR-Net sites can occur, but no other systems are
scanned. If an LTR or conventional system is
selected, roaming is disabled.
•
If Roaming and System Scan = On with an LTR or
conventional system selected, only LTR-Net or LTR
and conventional system types are scanned as
described previously.
•
If Roaming = Off and System Scan = On with an
LTR or conventional system selected, only the LTR
and conventional systems in the scan list are
scanned.
2.6.5 LTR MODE SCANNING
When scanning with an LTR system selected and
roaming disabled, only LTR and conventional systems
in the scan list are scanned. LTR-Net systems are not
scanned. If roaming is enabled, only LTR-Net systems
are scanned if an LTR-Net locality is detected as
described in the preceding section.
When LTR systems are scanned, the home
repeater of each LTR system in the scan list is
scanned. Scanning is sequential through all systems in
the scan list. If several systems are programmed with
the same LTR locality and home channel, channel
selection occurs only once. Therefore, there is no
delay to change channels which results in very effi-
cient scanning. Each home repeater is scanned for only
as long as necessary to detect all calls. Priority calls
are also detected on LTR systems while scanning (see
Section 2.8.2).
2-14
OPERATION
November 2001
Part No. 001-7240-001
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