Keysight NFA Series Noise Figure Analyzers Service Guide 347
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.
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