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Description
a
Marker Readout
Resolution
Log units resolution
Trace Averaging Off, on-screen
Trace Averaging On or remote
Linear units resolution
a.
Reference level and off-screen performance: The reference level (RL) behavior differs from previous analyzers
(except PSA) in a way that makes the Keysight CXA-m Signal Analyzer more flexible. In previous analyzers, the RL
controlled how the measurement was performed as well as how it was displayed. Because the logarithmic amplifier in
previous analyzers had both range and resolution limitations, this behavior was necessary for optimum measurement
accuracy. The logarithmic amplifier in the CXA-m signal analyzer, however, is implemented digitally such that the
range and resolution greatly exceed other instrument limitations. Because of this, the CXA-m signal analyzer can
make measurements largely independent of the setting of the RL without compromising accuracy. Because the RL
becomes a display function, not a measurement function, a marker can read out results that are off-screen, either
above or below, without any change in accuracy. The only exception to the independence of RL and the way in which
the measurement is performed is in the input attenuation setting: When the input attenuation is set to auto, the rules
for the determination of the input attenuation include dependence on the reference level. Because the input attenua-
tion setting controls the tradeoff between large signal behaviors (third-order intermodulation and compression) and
small signal effects (noise), the measurement results can change with RL changes when the input attenuation is set to
auto.
Frequency Response
Description
Frequency Response
(Maximum error relative to reference
condition (50 MHz)
a
Swept operation
Attenuation 10 dB)
9 kHz to 10 MHz
10 MHz to 3 GHz
3 to 7.5 GHz
7.5 to 13.6 GHz
13.6 to 19.3 GHz
19.3 to 24.2 GHz
24.2 to 26.5 GHz
a. For Sweep Type = FFT, add the RF flatness errors of this table to the IF Frequency Response errors.
An additional error source, the error in switching between swept and FFT sweep types, is nominally
0.01 dB and is included within the "Absolute Amplitude Error" specifications.
Description
IF Frequency Response
22
Specifications
0.01 dB
0.001 dB
Specifications
20 to 30C Full Range 95th Percentile (2)
0.5 dB
0.65 dB
1.25 dB
1.3 dB
1.5 dB
2.2 dB
2.5 dB
Specifications
a
Supplemental Information
1% of signal level (nominal)
Supplemental Information
Refer to the footnote for
"Band Overlaps" on page 12
0.6 dB
0.4 dB
0.8 dB
0.5 dB
2.0 dB
0.8 dB
2.5 dB
0.8 dB
2.5 dB
1.0 dB
3.5 dB
1.3 dB
4.0 dB
1.3 dB
Supplemental Information
.
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