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

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Agilent Technologies E8285A manual TX Pwr Zero