Agilent Technologies E8257D PSG User Manual page 113

Positive Polarity
CAUTION
Incorrect ALC sampling can create a sudden unleveled condition that may create a spike
in the RF output, potentially damaging a DUT or connected instrument. To prevent this
condition, ensure that you set markers to let the ALC sample over an amplitude that
accounts for the higher power levels encountered within the signal.
Chapter 3
Basic Digital Operation
Using Waveform Markers
99