Radio Shack 21-533 owner manual Set CALIBRATION/FS/SWR to CALIBRATION/FS

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21-533.fm Page 14 Thursday, August 5, 1999 3:47 PM

2.Set CALIBRATION/FS/SWR to CALIBRATION/FS.

3.To calibrate the meter, have your helper select a channel or frequency on your transmitter and hold down its trans- mit key. Tell the helper not to speak into the microphone.

Then, while the helper holds down the transmit key, walk around inside the marks you made using the steps in “Preparing the Antenna Site” on Page 11, covering as much area inside the circle as you can. As you walk, watch the meter’s needle. If it moves to the right of 5 on the FIELD STRENGTH scale, rotate the knob on the front of the meter until the needle lines up with 5 on the scale.

Notes:

If you use a CB that has sideband modes (SSB), do not select any of these modes. (Use only AM for field strength measurements).

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Contents CB/Ham Field-Strength SWR Meter Introduction Contents Connecting the Meter Measuring SWRCalibrating the Meter Measuring SWR Fm Page 6 Thursday, August 5, 1999 347 PM SWR Scales Interpreting SWR Readings Improving SWR Measuring Field Strength HintsPreparing the Antenna Site Fm Page 12 Thursday, August 5, 1999 347 PM Calibrating the METER/ Measuring Field Strength Set CALIBRATION/FS/SWR to CALIBRATION/FS Dot Fm Page 16 Thursday, August 5, 1999 347 PM Using Field Strength Readings to Tune Your Radio and Antenna Fm Page 18 Thursday, August 5, 1999 347 PM Care and Maintenance Fm Page 20 Thursday, August 5, 1999 347 PM Schematic Diagram Specifications Limited Ninety-Day Warranty RadioShack