Radio Shack 21-533 owner manual Calibrating the METER/ Measuring Field Strength

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21-533.fm Page 13 Thursday, August 5, 1999 3:47 PM

For example, for a 50-foot diameter circle:

50 feet

= 4.363 Feet

11.46

So, you would place a mark every 4.363 feet (4 feet, 3 inches).

CALIBRATING THE METER/ MEASURING FIELD STRENGTH

Important: Be sure to follow any radio service regulations that limit the amount of time you can transmit without a break or sta- tion identification.

1.Remove the supplied short wire antenna attached to the bottom of the meter, then insert it into FS ANT on top of the meter.

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Contents CB/Ham Field-Strength SWR Meter Introduction Contents Measuring SWR Connecting the MeterCalibrating the Meter Measuring SWR Fm Page 6 Thursday, August 5, 1999 347 PM SWR Scales Interpreting SWR Readings Improving SWR Hints Measuring Field StrengthPreparing 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