Channel Guard SCAN - This is the scanning con-
dition where tone or digital Channel Guard must
also be detected before locking on any channel.
Selected Channel - This is the last channel that the
operator selected with the Channel Select buttons.
The channel selection can be done either with
SCAN active or inactive. This channel is also
shown in the display window in SCAN mode un-
less activity is detected on another channel being
scanned.
Received Channel - The received channel is a
channel that has been identified to have the correct
carrier and correct Channel Guard (if enabled).
The received channel number is shown in the dis-
play window.
HOME Channel - This channel is a high priority
channel that can be programmed for easy access.
This HOME channel is selected by pressing the
∧
button. Pressing this button changes the selected
channel to the HOME channel regardless of the
current selected channel. If SCAN mode is "on"
prior to pressing this key, scanning will stop.
However, if no control button is pressed (channel,
volume, or PTT) within 5 seconds, scanning will
resume.
Scan List - This is an internal list that is made of
channel numbers including their status, that will be
scanned when the SCAN mode is turned on. This
list is selected by the process explained in the
PRE-SCAN OPERATION section of this manual.
Non-SCAN Channel - A non-SCAN channel is a
channel that is not in the Scan list determined by
the operator. This channel is not normally
scanned.
Non-Priority Channel - This channel is on the Scan
list as established by the operator. Activity on this
channel will be interrupted by activity on either the
Priority 1 (P1) or Priority 2 (P2) channel.
Priority 2 Channel (P2) - This channel is also on
the Scan list. Activity on this channel will inter-
rupt activity on any non-priority channel. How-
ever, activity on this channel will be interrupted
only by activity on the Priority 1 (P1) channel.
Priority 1 Channel (P1) - This channel is included
on the Scan list and activity on this channel will in-
terrupt and supersede any other channel activity.
Channel Activity - Channel activity is established
with the presence of a carrier modulated with a
correct Channel Guard (if programmed).
Hang time - Hang time is the time interval that the
channel remains locked to a frequency even though
no channel activity is present. This condition
arises after channel activity has stopped or the PTT
has been released. This interval is programmable
from 0.3 to 5.0 seconds.
PRE-SCAN OPERATION
A Scan list must be created before SCAN can be used.
The Scan list can be established in three (3) different ways.
Service Note: The radio will not go into the SCAN mode
when no channels are programmed.
1.
Front Programmable Option - When programmed,
this option allows the operator to modify the Scan
list from the front panel of the radio.
a.
"S" and
∧
Keys - When SCAN is off, holding
the "S" button down and pressing the button
increases the Priority status in the Scan list for
the displayed channel. This means that a pre-
vious non-SCAN channel will become a non-
priority channel, a non-priority channel will
become a Priority 2 (P2) channel, and a Prior-
ity 2 channel will become a Priority 1 (P1)
channel. Changing the SCAN status of any
channel to Priority 1 or 2 status removes the
previous channel with that status to a non-pri-
ority status.
b.
"S" and
∨
Keys - When SCAN is off, holding
the "S" button down and pressing the
∨
button
removes the selected channel from the Scan
list regardless of the priority level of that
channel.
2.
Field Programmable Option - When selected, this
option allows the operator to determine only the
non-priority and Priority 2 channels as described
above. The Priority 1 (P1) channel can only be se-
lected with a PC programmer.
3.
Selected Channel Option - When selected, this op-
tion allows the operator to determine the non-prior-
ity and Priority 2 channels as above. The Priority
1 channel becomes whatever channel is selected.
LBI-38956
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Содержание PCS 136-174 MHz
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