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Chapter 4, Adjacent Channel Power Screen
Field Descriptions
TX Freq Error/TX Frequency
This measurement displays Transmitter Frequency Error or absolute Transmitter
Frequency.
See Also
Tune Mode
field description (this page)
TX Power
Transmitter Power measures RF power at the RF IN/OUT port.
Operating Considerations
Only the RF IN/OUT port can be used for measuring TX Power on this screen.
When the
Input Port is set to Ant, four dashes (- - - -) appear in place of digits
for this measurement.
Use the Spectrum Analyzer
1
to measure low-level RF power (≤200 mW) at the
ANT IN port.
1. Optional on some Test Set models.
TX Pwr Zero
The transmitter power zero function establishes a 0.0000 W reference for
measuring RF power at the RF IN/OUT port.
CAUTION: RF power must not be applied while zeroing. Set the RF Generator screen’s Amplitude
field to off to prevent internal cross-coupling into the power detector while zeroing.
Operating Considerations
When power is applied to the RF IN/OUT connector, the temperature of the
internal circuitry increases. This can cause changes in the TX Power measurement
when low power levels are measured immediately following high power
measurements.
When alternately making high and low power measurements, always zero the
power meter immediately before making the low power measurements; this
provides the best measurement accuracy.
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