User's Manual

Measurement Guideline 3
46
Measurement Guideline 3
Special Test Considerations
Information for performing any of the FM, AM, or SSB measurements:
Coaxial Cable
Use short runs of high quality coaxial cable and high quality adapters
when connecting the device connected to the Test Set to ensure the
most accurate power measurement. Double shielded coaxial cable is
recommended when performing measurements on Cavities and
Duplexers.
Cable and Adapter Loss
Remember that cable and adapter losses and mismatch must be
considered when measuring RF power at VHF/UHF frequencies. If
losses are known, they can be entered using the CONFIGURATION
screen. Once entered, the measurement results are adjusted
accordingly.
Incidental Audio
Incidental audio into a built-in or attached microphone may cause
inaccurate readings. Whenever possible, disable the microphone input
or minimize ambient audio during the measurement.
Transmitter’s DTMF, CTCSS, and or CDCSS Functions
Verify that the Transmitter’s DTMF, CTCSS, and/or CDCSS functions
are OFF (if equipped), unless otherwise specified.
Receiver Test Loads
If using the Test Load, the measurement must be performed with only
the load connected to the Receiver’s audio output circuitry (internal
speaker disconnected). If the external speaker jack does not break the