Lo Band Lock; Lo Control - Keysight n9020a Service Manual

Service and Diagnostics Menus
Service Key Descriptions

LO Band Lock

Provides the ability to tune the analyzer over as large a range as can be
accommodated by the specified LO Band. As a result, this feature can be used
to check performance in the LO band overlap regions. By definition, multi-band
sweeps are not allowed.
When band lock is in effect the Advisory Event "LO Band Locked: Band <x>"
where "x" is a value between 0 and 6.
When band lock is not in affect the Advisory Event "LO Band Locked: Band
<x>" is cleared.
Dependencies/Couplings:
LO Bandlock will be grayed-out if Bandlock is OFF. If Harmonic Bandlock is any
setting other than OFF, LO Bandlock menu key is enabled. If LO Bandlock is
other than OFF, and the Harmonic Bandlock is transitioned to OFF, the LO
Bandlock is set to OFF.
Off
Turns LO Band Lock to Off. Analyzer will tune from LO band to LO band
normally.
Band 0
Locks the analyzer to LO Band 0.
Band 1
Locks the analyzer to LO Band 1.
Band 2
Locks the analyzer to LO Band 2.
Band 3
Locks the analyzer to LO Band 3.
Band 4
Locks the analyzer to LO Band 4.

LO Control

Provides keys that allow you to control the LO. This is only present on analyzers
equipped with Option EXM, External Mixing.
2nd LO Gain DAC
This parameter provides the ability to adjust the output gain of the 2nd LO
DAC. The range is from 0 to 4095 where 0 is the minimum gain and 4095 is the
maximum gain. Setting a value of 4096 or greater returns control to the
instrument. In External Mixing, this DAC controls the level of the 1st LO signal
at the front panel EXT MIXER connector.
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