Transmitting
Press the
PTT
button and speak normally about four inches from the microphone. Release the
PTT
button when finished speaking. Do not hold the
PTT
longer than necessary after talking. Channels
programmed for receive-only sound an alert tone, display
RX
ONLY
, and do not transmit.
Your radio may be setup with the Transmit Inhibit feature. This feature locks the PTT switch to
keep users from talking over other radio conversations. It can also be setup to allow you to
transmit over the signal anyway if the PTT switch is pressed twice within approximately ½
second. The transmit inhibit settings are accessed from the main menu
(refer to “Global
Submenu”)
.
Your radio may be set up with the Transmit Timeout feature that shuts the transmitter down after
a pre-determined time. This is useful for preventing long transmissions when PTT is accidentally
pressed. Transmit timeout defaults to off, but can be programmed from 0 minutes (off) to 5
minutes, in 30 second increments (
refer to “Global Submenu”).
Scanning
Scanning is available on the Guardian portable at a rate of about
8 channels per second. Various types of scanning exist. The radio can be programmed to talkback
on the received channel or on the currently selected channel.
Guidelines
To maximize the efficiency of scanning channels, use the following guidelines:
•
Keep the number of channels in a scanlist to the minimum required. Since the radio scans
at about 8 per second, each channel is scanned faster if there are fewer channels to scan.
•
If scanning channels with noise squelch settings, higher carrier squelch values provide
faster results (improvements above values of 8 are minimal), but higher squelch values
reduce effective range.
•
If scanning multiple channels with the same frequency (regardless of squelch values), use
shadow channels when possible. A primary channel with all its shadows still scans at the
rate of about 8 per second.
Setup
1.
Create a scan list. Display the channel to include in the scan list. Use the scan list add/delete
button to toggle channels on/off the scan list. A square around the
C
indicates the channel is
in the scan list. To remove the channel from the scan list, press the left scroll button. The
square around the
C
is cleared.
To add a zone to the zone scan list, set the radio to the zone to include in the scan list. Press
and hold the scan list add/delete button to toggle the selected Zone on/off the Zone Scan List.
A square around the
Z
indicates the zone is in the scan list.
2.
Select a scan mode. The mode is preprogrammed into the radio but you can verify or change
it using the keypad.
Refer to “Scan Menu”.
The modes are normal scan, scan zones in the scan
zone list or scan all frequencies programmed into the radio.
3.
Activate scan. Use one of the following methods:
•
Use the preprogrammed auxiliary button
•
Use the preprogrammed collar switch, or
•
Access the main menu
(refer to “Scan Menu”)
The selected mode of scanning is evident by the display. Examples are:
SCAN****