Keysight NFA Series Noise Figure Analyzers Service Guide 117
Instrument Messages
Condition Messages
149 8 Meas Error
151 9 Memory Error E
151 9 Memory Error;Shorten
capture interval
E A shortage of free memory related to longer
capture intervals has occurred. The
measurement is aborted and all results return
invalid values
153 10 I/O Error E
153 10 I/O Error; Ext Source needs
IP Addr
E No IP address entered for external source and
external LO control is ON.
155 11 Trig Error E
157 12 Invalid Data Status bit
only
This is the “invalid data indicator”, same as the
“*” in the upper right corner of the screen. It
means that the on-screen annotation does not
match the on-screen data, usually because a
measurement is pending after a settings
change. There is no message in the status line
and nothing in the history queue, but there IS
an on-screen indication and a status bit.
159 13 Settings Alert W
159 13 Settings Alert;LO may
overload IF
W If the sweep type is Swept, the start frequency
of the instrument is less than 10 MHz, and you
put Swept IF Gain in Manual High, then a
warning condition is generated and remains in
effect as long as this condition exists.
In some older analyzers this was error 1109.
159 13 Settings Alert; Diff probe
mismatch; <I|Q|I,Q>
W The attenuation values of the two probes on
the I and/or Q channels differ by too much for a
valid differential reading.
159 13 Settings Alert; Acquisition
truncated
W In the Analog Demod mode, certain extreme
settings combinations will result in a required
acquisition length in excess of the capacity of
the analyzer.Increase the AF Spectrum RBW
or the RF Spectrum RBW, decrease the
Channel BW, and/or decrease the Demod
Waveform Sweep Time.
Err# Bit in
status
register
Message Error or
Warning
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