Agilent Technologies N8201A Service Manual Page 554

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554 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz
27 Using the STATus System
Questionable Status Register
The questionable status register monitors the instrument’s condition to see if anything
problematic has happened to it. It is looking for anything that might cause an error or a bad
measurement like a hardware problem, an out of calibration situation, or a unusual signal.
All the bits are summary bits from lower-level event registers.
Bit Condition Operation
3 Power summary The instrument hardware has detected a power
unleveled condition.
4 Temperature summary The instrument is still warming up.
5 Frequency summary The instrument hardware has detected an unlocked
condition or a problem with the external frequency
reference.
8 Calibration summary The instrument has detected a hardware problem while
doing the automatic internal alignment process.
9 Integrity summary The instrument has detected a questionable
measurement condition such as: bad timing, bad
signal/data, timeout problem, signal overload, or “meas
uncal”.
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