Keysight E8267D User Manual page 332

Troubleshooting
RF Output Power Problems
A successful power search is dependent on a valid power search reference
and the instrument's ability to level at a set power level without modulation.
There are three power search modes: manual, automatic, and span.
Use the following steps to set the signal generator to manual fixed power
search mode:
1. Press Preset.
2. Press Frequency and enter the desired frequency.
3. Press Amplitude and enter the desired amplitude.
4. Press Amplitude > ALC Off On to Off.
5. Press Power Search (Manual, Fixed) > Minimum. (The Minimum softkey
6. Press RF On/Off to On.
7. Press Do Power Search.
Setting the Power Search Reference (E8267D only)
A successful power search is dependent on a valid power search reference.
NOTE
Additionally, on the E8267D, there are up to four Power Search Reference
modes: ARB RMS, Fixed, Manual RMS or Manual, and Modulated. These four
reference modes select the reference voltage used while the RF signal is being
I/Q modulated. (Power search reference modes are not used for analog
modulation: FM, PM, or pulse modulation.)
318
Manual When Power Search is set to Manual, pressing Do
Power Search executes the power search calibration
routine for the current RF frequency and amplitude. In
this mode, if there is a change in RF frequency or
amplitude, you will need to press Do Power Search
again.
Auto When Power Search is set to Auto, the calibration
routine is executed whenever the frequency or
amplitude of the RF output is changed.
Span When Power Search is set to Span, pressing Do Power
Search executes the power search calibration routine
over a selected range of frequencies at one time. The
power search corrections are then stored and used
whenever the signal generator is tuned within the
selected range of frequencies. Span power search
settings are only valid for a single power level.
sets the internal attenuator to its maximum setting during power search to
protect the power sensitive circuits. Refer to the Key Help.)
This executes the manual fixed power search routine, which is the default
mode.
Keysight E8357D/67D & E8663D PSG User's Guide