Cobra 25 LTD - Core Operation Controls; Receiving Signals and S-Meter; Noise Filtering and Display Brightness; Adjusting RF Gain and Squelch

Full clockwise rotation closes the gate
allowing only very strong signals to enter.
Full counterclockwise rotation opens the
“gate” allowing all signals in.
To achieve the Desired Squelch Setting (DSS),
turn the Squelch control counterclockwise
until you hear noise. Now turn the control
clockwise just until the noise stops. This is the
DSS setting.
Setting Squelch
Squelch is the “control gate” for incoming signals.
Operation
Operation
2
1
3
NOISE
WEAK SIGNALS
MEDIUM SIGNALS
STRONG SIGNALS

G AT E C L O S E D
NOISE
WEAK SIGNALS
MEDIUM SIGNALS
STRONG SIGNALS
NOISE
WEAK SIGNALS
MEDIUM SIGNALS
STRONG SIGNALS

G AT E 
O P E N
NOISE
WEAK SIGNALS
MEDIUM SIGNALS
STRONG SIGNALS

NOISE
WEAK SIGNALS
MEDIUM SIGNALS
STRONG SIGNALS
G AT E
Gate open
Gate set to Desired
Squelch Setting (DSS)
Gate closed
Setting Squelch