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S:\agilent\e8285\REFGUIDE\MANUAL\fields.chp
Chapter 4, Description of Fields
Fields
TX Pwr Zero
The TX Pwr Zero function establishes a 0.0000 W reference for measuring RF
power at the RF IN/OUT port. The
TX Pwr Zero field is imported from the RF
ANALYZER
screen and is programmed exactly as it is on its home screen.
See “RF Analyzer” in the GPIB Command Syntax chapter of the E8285A
Condensed Programming Reference Guide for programming command syntax.
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.
Screens Where Field is Present
ADJACENT CHANNEL POWER
CALL CONTROL
CALL CONFIGURE
AF ANALYZER
RF ANALYZER
TX TEST