Calibrate For Swr (Standing Wave Ratio) - Cobra 29 LTD Series Owner's 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 to achieve optimum performance.
29 LTD CLASSIC
FM
NOR
PUSH
AM/FM
English
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1. Select Channel 20.
2. Switch to the CAL position.
NOTE: Antenna Indicator LED will illuminate
when transmitting if the SWR is high.
3. Push and hold the mic button.
Operation
29 LTD CLASSIC
FM
NOR
PUSH
AM/FM
Calibrate for SWR (Standing Wave Ratio)
continued
4. While holding the mic button adjust the
SWR CAL knob so 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.)
5. While still holding down the mic button,
set the S/RF SWR CAL
SWR position, to read the SWR reading.
6. Repeat the same steps two through five
on Channel 1 and 40. This will check
SWR for all channels.
NOTE: The reading will be slightly higher on
Channels 1 and 40 compared to Channel 20.
NOTE: When switched to SWR position the
meter needle should ideally be as far to the left
as possible. Anything over 3 is not acceptable.
The antenna indicator will light. A slight
antenna height adjustment (higher or lower)
may be required. Repeat recalibration steps.
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