HP 22A, 83620A, 24A manual See Also ALC, CONNECTORS, Det Gal Menu, Fltness ON/OFF

[POWER LEVEL)

MTR: x.xx .

In Normal, Module, the (POWER LEVEL) key controls the output power of the synthesizer as compared to the feedback voltage from

amillimeter-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 (+25 to -20 dBm). 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:

--> ATTEN X dB, MODULE LEVEL: X.Xx dBm ,

where X represents a numeric value. The data display area indicates:

Power(dBm)

MDL: x.xx .

In ALCoff, 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 dB. The attenuator (if present) is automatically uncoupled from the ALC system.

When you press [POWER LEVEL), the active entry area displays:

--> ATTEN X dB, REFERENCE: X.Xx dB ,

where X represents a numeric value. The data display area indicates:

Ref(dB)

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] <num>[lvl suffix] or

MAXimum]MINimum]UP]DOWN

Analyzer: PL

See Also (ALC), CONNECTORS, Det Gal Menu, (FLTNESS ON/OFF],

Set Atten, Tracking Menu, Uncoupl Atten

“Programming Typical Measurements,” in Chapter 1.

P-4 Operating and Programming Reference	HP 8360
	User’s Handbook