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

1.Turn off your radio. Then disconnect the antenna from the radio and plug it into ANTENNA on the back of the meter.

2.Plug the coaxial cable into the radio’s antenna jack and into TRANSMITTER on the back of the meter.

CALIBRATING THE METER/

MEASURING SWR

1.Set CALIBRATION/FS/SWR on the front of the meter to

CALIBRATION/FS.

2.Turn on your radio. Then select a channel or frequency on your transmitter and hold down its transmit key. Do not speak into the microphone.

Notes:

An SWR reading will be different for different frequen- cies (channels). If you transmit on one channel more often than any other, select that channel. If you trans-

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Radio Shack 21-533 owner manual Calibrating the Meter Measuring SWR