HP 8360 - Manual (Page 278)

MTR: x.xx .
In Normal, Module, the ( POWER LEVEL ) key controls the output
power of the synthesizer as compared to the feedback voltage from
a millimeter-wave source module. The attenuator (if present) is
automatically uncoupled from the ALC system and the
( POWER LEVEL
key controls the Level DAC and Level Control Circuits (see
Figure A-l) within the ALC level range
to -20 This
mode of operation requires a feedback connection from the module to
the synthesizer through the SOURCE MODULE INTERFACE.
When you press [ POWER LEVEL ), the active entry area displays:
X MODULE LEVEL: ,
where X represents a numeric value. The data display area indicates:
MDL: x.xx .
In there is no feedback voltage to level the power, so power
level is uncalibrated. A leveling point is not specified in this mode.
The ( POWER LEVEL ) key controls the linear modulator directly, from 0
to approximately -80 The attenuator (if present) is automatically
uncoupled from the ALC system.
When you press [ POWER LEVEL ), the active entry area displays:
X REFERENCE: ,
where X represents a numeric value. The data display area indicates:
OFF: x.xx
and the message line indicates: UNLVLED.
In Search, any of the leveling points can be specified and used as the
comparison feedback voltage. Basically, this mode operates the same
as ALCoff after the searched-for power level is reached. The active
entry area displays different information depending on the leveling
point chosen.
Programming Codes SCPI: POWer[:LEVEL] [lvl suffix] or
Analyzer: PL
CONNECTORS, Det Gal Menu,
Set Tracking Menu,
“Programming Typical Measurements,” in Chapter 1.
Operating and Programming Reference HP 8360
User’s Handbook