Cobra 29 WX NW ST User Manual - Page 6

29 WX NW ST manual 3.3 6/15/99 2:53 PM Page 10 Operation Calibrate For SWR (Standing Wave Ratio) 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. 1 Select channel 20. 3 Push and hold mic button. Operation Note Calibration must be made in an open area (never in a garage). Vehicle doors must be closed. No one should be standing near the antenna.(See your antenna directions for more complete information). Note The reading will be slightly higher on Channels 1 and 40 compared to Channel 20. 2 Switch to the CAL position. 10 4 While holding mic button adjust the SWR CAL knob so the meter needle swings to the CAL w mark on the meter (located on the right). continued 11