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Theory of Operation
RF Vector Network Analyzer
Temperature Related Information
N9923AN
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 N9923AN FieldFox RF Vector Network Analyzer User's Guide (Part Number
N9923-90006), "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.
5-20
Service Guide N9923-90005
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Troubleshooting
