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Theory of Operation
Temperature Related Information
Temperature Related Information
Four temperature sensors are in the analyzer: one on the A4 RF board, two on
the A5 system board, and one in the battery pack.
— RF1—on the A4 RF board
— SB1—on the A5 system board near the headphone jack
— SB2—on the A5 system board near the battery compartment
— Battery pack—inside the battery pack
The battery pack has its own internal temperature sensor. The battery pack will
shut itself down in the case of extreme temperatures.
See
Chapter 8
for instructions on viewing temperature readings.
See the N9923A FieldFox RF Vector Network Analyzer User's Guide (Part
Number N9923-90001), "FieldFox High-Temperature Protection" section, for
information about operation at high temperature.
The internal temperature of the unit is critical when executing the TME based
software for tests and adjustments. See the TME help for detailed information.
Under typical bench top (indoor) conditions, the internal temperature of the
unit will be about 20 ×C above ambient once the internal temperature has
stabilized. It will typically take 60 to 90 minutes for the internal temperature to
stabilize when a "cold" unit is turned on.
Keysight N9923A Service Guide
5-21
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Troubleshooting
