Operating Instructions
Becker Avionics
SQUELCH
28
VHF Transceiver 0638.420-071 Issue 06 02/2021
•
This function operates independently of the selected operation menu.
•
A short push on "SQL/IC" key changes the function to "ON" or "OFF".
Squelch "ON"
•
If the squelch function is active ("ON") the audio noise is muted.
Squelch "OFF"
•
If the squelch is "OFF" the arrow symbol
"►" in front of the
active frequency stay into view all the time.
•
Audio noise is audible as long as the signal is received.
•
The squelch threshold is adjustable see "" page 35.
•
The field strength is shown with triangle symbol in front of the related
frequency (in all frequency selection modes).
•
The field strength of a received signal relates to the measured RSSI
level ("Received Signal Strength Indication").
Weak Signal Strength
Good Signal Strength Excellent Signal Strength
RSSI passing squelch levels
(empty triangle)
-88 > RSSI > -80 dBm
(half-filled triangle)
RSSI > -80 dBm
(fully filled triangle)
127.000
118.005
SQL
127.000
118.005
SQL
127.000
118.005
SQL
127.000
118.005
SQL
127.000
118.005
SQL
