October, 1996 6880902Z36-B 4-9
GM300 Radio Service Software Manual Basic Features
GM300 Features
4
Rx Squelch Code
RSS LOCATION
DEFINITION Receiver unmutes if carrier with this specific subaudible code is present. Receiver
unmutes when it detects this code, allowing more users and privacy on a fre-
quency.
DEFAULT/CHOICES Default: BLANK
Choices: ■ see TPL/DPL tables (Appendix C) or press F1 to display help
If the Rx Squelch Type = TPL, then enter a frequency in hertz (Hz) or any code
from Appendix C.
If Rx Squelch Type = DPL, type a 3-digit numeric code from the table in Appendix
C.
DEPENDENCIES Rx Squelch Type.
EXCEPTIONS If a Rx Squelch Type = Carrier Squelch, then squelch code is not available.
RECOMMENDATIONS Use when you want to have multiple groups using same frequency or when you
want more privacy.
Receiver response time of the PL detector can be improved slightly, for some
codes, by detuning the PL code frequency by ±0.1 Hz.
IMPORTANT NOTE TPL tones above 220 Hz will have more bleed-through to the speaker. DPL code
645 is a reserve code and will have a greater false opening probability. TPL codes
near 120 Hz and 180 Hz have a high false opening probability due to 60 Hz AC
power harmonies. Countries having 50 Hz AC power may have false opening on
100 Hz (code 1Z) and 150 Hz. TPL 134 Hz can be false-opened by DPL dekey.
SEE ALSO Rx Squelch Type
PROGRAMMING PROCEDURE
1. Press F4 at the MAIN MENU to get to the
CHANGE/VIEW CODEPLUG MENU.
4. Press Tab (or Enter or Return) until the Rx
Squelch Code field is highlighted.
2. At the CHANGE/VIEW CODEPLUG MENU,
press F5 to get to the MODE CONFIGURATION
screen.
5. Use the ↑ ↓ arrow keys to select the desired
Rx Squelch Code or type in the desired code
directly.
3. At the MODE CONFIGURATION screen, select
the mode number for which you want to pro-
gram the desired Rx Squelch Code by pressing
either the F3 or F4 keys until the desired mode
# is displayed in the Name field.
6. To change the Rx Squelch Code on other
modes, repeat steps 3-5.
MAIN
MENU
MODE
screen
CONFIG
field
Rx Squelch Code
➠
F4
➠
F5
➠
Tab
CHANGE/
VIEW
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