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Open and Closed Modes
You can set your scanner to change the way it receives signals. These settings,
called open mode and closed mode, affect how the scanner receives signals
from communications systems that use some type of closed squelch (such as
Motorola, EDACS, and LTR systems).
Notes:
• In open mode, you hear all active talkgroups except those you specifically
exclude, making it easy to hear everything going on. In closed mode, you
hear only those talkgroups you specify. This makes it easy to listen only to
talkgroups you are interested in and exclude others.
• When you select a system voice channel manually, any transmission opens
squelch, regardless of the current mode.
• When no ID code is programmed into the scanner, it receives the signal in
MO, ED, or LT mode. In open mode, the scanner stops on any transmission.
If the ID is stored, the text tag appears on the display. Otherwise, the talkgroup
ID appears on the display. In closed mode, the scanner only stops on a
transmission if the ID is stored.
You can set each of the scanner’s channel storage banks to open or closed
mode.
In open mode, the scanner scans signals transmitted in all systems. The scan-
ner stops on any ID code and only uses the ID list to look up ID text tags.
In closed mode, the scanner stops only on signals that have an ID code which
is found in the ID list for the bank. Also, the scanner scans signals transmitted
only under the following conditions:
• When the signals are in the FM, or AM mode.
• When the signals are in the CT, or DC mode while these setting is Code
Search setting.
• When the signals are in the CT, or DC mode and the signal’s ID code matches
the programmed ID code.
• When the signals are in the MO, ED, or LT mode and the signal’s ID code
matches the programmed ID code
You can also select the user or talkgroups you want the scanner to receive in
closed mode.
When you set a channel storage bank to open mode, + appears under the
bank’s number while scanning. When you set a channel storage bank to closed
mode, – appears under the channel storage bank’s number while scanning.
OPEN or CLOSED appears while the scanner is in manual mode or while the
scanner is receiving a signal during scanning. See “Changing the Open/Closed
Mode” for more information about setting the open and closed modes.