HP ESG Series - Atten Hold off on; Do Power Search

5-24
Hardkey and Softkey Reference
Ampl
Atten Hold Off On
This softkey toggles the attenuator hold function on and off. Turn attenuator hold
on to freeze the attenuator at it’s current setting. The
ATTN HOLD display
annunciator will turn on. Use this function at any time you want to guarantee that
there will be no power discontinuity normally associated with the attenuator
switching during power adjustments. (When the attenuator is held, only a
frequency change will change the attenuator setting. There will be no attenuator
switching during power adjustments.) With attenuator hold on, the maximum
power adjustment range will vary. However, you will have at least +4 dB and at
least
−13 dB range.
Softkey Location: Press
Ampl, AttenHoldOffOn
Status after Normal Preset: Off
SCPI Commands:
[:SOURce]:POWer:ATTenuation:AUTO ON|OFF|1|0
[:SOURce]:POWer:ATTenuation:AUTO?
Do Power Search
Press this softkey to execute the power search routine one time. Power search is
an internal calibration routine used to achieve calibrated output power when the
ALC is off. You can execute a power search at any time by pressing this softkey.
You do not need to disconnect modulation inputs, however modulation is disabled
during power search. If you are using external I/Q modulation, the power search
routine assumes that the I/Q input level is = 0.5 V
rms
. Actual output
amplitude will scale directly with .
The following conditions must be met in order to execute the power search
routine:
• ALC Off On is set to Off
• RF On/Off is set to On
Softkey Location: Press Ampl, toggle ALC Off On softkey to Off, press
Do Power Search
SCPI Commands:
[:SOURce]:POWer:ALC:SEARch ONCE