11
Squelch
The squelch is used to eliminate any annoying background noise when there
are no signals present.
Make sure to first select a channel not in use before setting the
squelch in your PM-500 SWF VHF Marine radio.
-
S1
- max sensitivity (min squelch)
S2
- med sensitivity (med squelch)
S3
- min sensitivity (max/tight squelch)
1. Press
SQL/UIC
momentarily.
S
shows on the
display and the current squelch level will flash.
2. Press
SQL/UIC
while the squelch level shows to
change the squelch level to the next step.
3. Press and hold
SQL/UIC
to save and exit the
squelch setting.
Think of squelch as a gate. If you increase
the squelch level to maximum it raises the
‘Squelch gate’ so only the strongest sig-
nals get through.
If you decrease the squelch level to mini-
mum it lowers the ‘Squelch Gate’ to the
extent that weak signals can get through.