Keysight E6680A - Page 1133

9 Programming the Instrument
9.4 Status Register System & STATus Subsystem
9.4.6.10 Questionable Calibration Extended Needed Register
Monitors conditions that occur because a calibration or alignment is required to
guarantee accurate measurements. It summarizes them in bit 8 of the "Questionable
Calibration Register" on page 1129.
Bit Condition Operation
1 Align 9kHz-
30MHz required
EMI receiver alignment required, 9kHz-30 MHz (conducted band)
2 Align 30MHz-
1GHz required
EMI receiver alignment required, 30 MHz-1 GHz (radiated band)
4 Input Attenuation
not calibrated
The input attenuator is uncalibrated
5 Align current
frequency range
required
Alignment for current set frequency range is needed. It is suggested
to process Align Selected Freq Range for the frequency range in use
8 MPA Align
required
The Multiport Adaptor must be calibrated (EXT only)
11 Characterize
Preselector
required
Go to the System, Alignments, Advanced menu and perform a
“Characterize Preselector”
12 Characterize
Noise Floor
required
Go to the System, Alignments, Advanced menu and perform a
“Characterize Noise Floor”
Filter Registers
–
"Questionable Calibration Extended Needed Condition" on page 1134
–
"Questionable Calibration Extended Needed Enable" on page 1134
–
"Questionable Calibration Extended Needed Event Query" on page 1135
1133 IQ Analyzer Mode User's &Programmer's Reference