RIDGE
ACCESSORIES
PAGE 8
FUNCTION- Squelch
WHAT IS SQUELCH?
Squelch controls silence the constant background noise in two-way radio receivers during periods of
inactivity. The radio will still receive transmissions when a signal is present, however it will eliminate
background noise when a signal is not present. The squelch default on the RR100A is closed.
SETTING SQUELCH
To open the squelch, press and hold the
“(F) BUTTON”
for 2 seconds. The unit will beep and back-
ground noise can now be heard.
To close the squelch, press and hold the
“(F) BUTTON”
for 2 seconds.. The unit will beep and the
background noise can no longer be heard.
To access squelch control, press the
“(F) BUTTON”
once, SQL will display on the screen. Press the
“UP ARROW“
or
“DOWN ARROW”
to select an option between 1-9. 1 is the most sensitive setting
and it will open on very weak signals, while 9 is the least sensitive setting and will only open on very
strong signals. Once the desired setting is selected, press and hold the
“(F) BUTTON”
for 3 seconds
to save the setting. The unit will automatically change back to the default screen.
NOTE:
The factory default setting of the RR100A is 3 which is medium sensitivity.
FUNCTION- CTCSS & DCS
WHAT IS CTCSS AND DCS?
CTCSS (Continuous Tone-Coded Squelch System) and DCS (Digitally Coded Squelch) modify the
transmission signal to allow multiple users to share the same channel without disturbing each other.
This is an important feature on a radio when there are many radio users in the same area.
CTCSS continuously superimposes any one of about 50 low-pitch audio tones on the transmitted
signal, ranging from 67 to 254 Hz.
DCS was designed as the digital replacement for CTCSS. DCS adds a 134.4 bps (sub-audible) bit
stream to the transmitted audio
CTCSS or DCS is enabled by on the radio through selectable sub channels. When CTCSS or DCS is
enabled, incoming signals must be on the same CTCSS or DCS sub channel as the receiving radio
or they will be filtered out.
NOTE:
The CTCSS and DCS Tone Charts can be found on pages 16 - 18 at the rear of this manual.
RADIO OPERATION (continued)
FACTORY RESET
To reset the radio, press and hold the
“(F) BUTTON”
while powering on the radio. “RES” will be
shown on the LCD display indicationg the radio is being reset to factory default settings.
Summary of Contents for RR100A
Page 1: ...PAGE 1 ...
Page 15: ...RIDGEACCESSORIES PAGE 15 UHF CHANNELS AND FREQUENCIES UHF CHANNEL FREQUENCY TABLE ...
Page 16: ...RIDGEACCESSORIES PAGE 16 UHF CHANNELS AND FREQUENCIES continued CTCSS TONE TABLE ...
Page 17: ...RIDGEACCESSORIES PAGE 17 UHF CHANNELS AND FREQUENCIES continued DCS CODE TABLE ...
Page 18: ...RIDGEACCESSORIES PAGE 18 UHF CHANNELS AND FREQUENCIES continued DCS CODE TABLE continued ...
