Radio Shack 21-533 owner manual Dot

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21-533.fm Page 15 Thursday, August 5, 1999 3:47 PM

If you have an amateur radio, select the continuous wave (CW) or tuning mode to check the field strength.

4.To measure field strength, as the helper continues to hold down the transmit key, move to the marked spot on the circle due north of the antenna, then watch the meter’s needle.

Note the reading on the FIELD STRENGTH scale and place a dot on the template on Page 11 corresponding to the reading at that point.

In this example, the needle shows a 4 on the FIELD STRENGTH scale. Place a dot where the spoke repre- sentating the path you walked from the center of the circle intersects the circle marked with a 4 on the template.

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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