Garmin VHF 725e - Manual (Page 23)

17
GETTING
STARTED
Setting the
Squelch
Threshold
NOTE: You will notice an “A” indicator adjacent to
some channel numbers in the USA and Canadian
bands. These are simplex channels (transmitting and
receiving on the same frequency) while the International
counterpart is a duplex channel (transmitting on one
frequency while receiving on another.)
Setting the Squelch Threshold
Setting the Squelch is important for recep-
tion of signals you want to hear. There are ten
threshold levels, from 0, which allows all signals
to be received, to 9, which allows only the
strongest signal to be heard through the speaker.
The diagram in Figure 5 demonstrates how
setting the threshold level allows you to hear
only the signals you desire, while weaker,
unintelligible signals are not heard.
To set the Squelch threshold:
1. Adjust the Squelch to the lowest setting by
pressing and holding the Squelch (SQ) key, then
pressing the DOWN arrow key repeatedly until the
display indicates “0”. You should hear static. If you
hear a voice transmission, change to another
channel and repeat this step. (Figure 5)
2. While holding the Squelch (SQ) key down, use
the UP arrow key to increase the squelch level to
“1”. If no static is heard, you have set an
acceptable squelch threshold level. If you hear
static, then increase to the next threshold level,
repeating the process until unwanted static is
eliminated. Release the SQ key to return to your
selected channel. The squelch setting is universal
for all channels, but it may require resetting from
time to time
NOTE: During squelch adjustment, Tri-Watch and
Scan are suspended.
1
2
3
4
5
FIGURE 5
EXAMPLE of THRESHOLD
SET AT LEVEL 5
Selected Squelch Level
Up/Down Keys
Only Signals
Stronger Than
Level 5
Will Be Heard
Signal At Level 6
Squelch (SQ) Key