HP 4284A - Page 106

Front Panel Operation for Setting the Automatic Level Control Function
Perform the following steps to set the automatic level control
function to ON or OFF.
1. Move the cursor to the ALC eld. The following softkeys will be
displayed.
NNNNNNNN
ON
NNNNNNNNNNN
OFF
2.
Press
NNNNNNNN
ON to set the automatic level control function to ON. Press
NNNNNNNNNNN
OFF to set the automatic level control function OFF.
High Power Mode
Description (Refer to Appendix G.)
When Option 001 (Power Amplier/DC Bias) is installed, the
oscillator level can be set from the 5 mV
rms
to 20 V
rms
, and from 50
 A
rms
to 200 mA
rms
, and also the dc bias can b e set up to
6 40 V.
The Hi-PW eld allows you to make Option 001 valid or invalid.
So if the high p ower mo de is set to OFF, the oscillator lev
el or the
dc bias controls are the same as the oscillator level or the dc bias
controls of an HP 4284A without Option 001.
Note
When Option 001 is installed, the p ower-on default setting of the
high power mo de is ON.
When the low test signal level measurement is performed without
using dc bias, the measurementvalue at the high p ower mo de: OFF
may b e more stable than the measurementvalue at the high p ower
mo de: ON.
Note
When the HP 42841A is connected to the HP 4284A, the high p o
wer
mo de is set to OFF, and Option 001 is disabled.
Front Panel Operation for Setting the High Power Mode
Perform the following steps to set the high p ower mo de to ON or
OFF when Option 001 is installed.
1. Move the cursor to the Hi-PW eld. The following softkeys will
be displayed.
NNNNNNNN
ON
NNNNNNNNNNN
OFF
2.
Press
NNNNNNNN
ON to set the high p ower mo de to ON. Press
NNNNNNNNNNN
OFF to set the
high power mo de to OFF.
MEAS SETUP Menu 4-9