Calibrate For Swr (Standing Wave Ratio) - Cobra 29 LX MAX User Manual

Operation

Calibrate for SWR (Standing Wave Ratio)

SWR calibration is done to properly adjust the length of
the antenna and to monitor the quality of the coaxial
cable and all RF connections.
This calibration is critical in order to achieve optimum
performance.
NB/ANL
S/RF
VOL
OFF
Set the radio to channel 20.
1
Press S/RF-SWR/CAL button to select CAL.
2
10
AW-1210039-1B_29LX_MAX_MANL_REV_022021.indd 10-11 AW-1210039-1B_29LX_MAX_MANL_REV_022021.indd 10-11
1.5 2 3
CAL
SWR
ANL
RX
RF
3 5 7 9
1
SIG +30dB
MEM WX !
SQ DYNAMIKE RF GAIN DELTA TUNE T BACK
MAX
MIN MIN MAX
2
1.5
NB/ANL
SWR
ANL
S/RF
RF
SWR
CAL
3
1
SIG
SQ
VOL DYNAMIKE
2 3
NB/ANL 1.5
SWR
ANL
RF
CAL
OFF MIN 3 5 7 9
1
SIG +30dB
VOL SQ DYNAMIKE
OFF MIN MAX
PUSH &
HOLD
SCAN CH 9/19
SWR
CAL
OFF
3 Push and hold the Push-to-Talk (PTT) button.
3
CAL
TX
RX
5 7 9
+30dB
MEM WX !
RF GAIN
CAL
TX
RX
MAX MIN MAX
MEM WX !
RF GAIN DELTA TUNE T BACK
While holding the
4
PTT adjust the
SWR CAL knob so
MIN MAX
the meter swings
to the CAL mark
on the right side of
the meter.
Note
Calibration must be made
in an open area (never in a
garage). The vehicle 's doors
must be closed. No one should
be standing near the antenna.
(See your antenna directions for
more complete information).
SCAN CH 9/19 Note
The reading will be slightly
higher on Channels 1 and 40
compared to Channel 20.
SWR
DELTA TUNE T BACK
CAL
SCAN CH 9/19
OFF
SWR
CAL
OFF
continued
11
Operation
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