Reference Level; Display Scale Switching Uncertainty; Display Scale Fidelity - Keysight M9290A Manual

Description Specifications

Reference Level

Range
170 to +23 dBm in 0.01 dB steps
Log Units
Linear Units 707 pV to 3.16 V with 0.01 dB resolution (0.11)
Accuracy 0 dB
a. Because reference level affects only the display, not the measurement, it causes no additional error in
measurement results from trace data or markers.
Description

Display Scale Switching Uncertainty

Switching between Linear and Log
Log Scale Switching
a.
Because Log/Lin and Log Scale Switching affect only the display, not the measurement, they cause no additional
error in measurement results from trace data or markers.
Description
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Display Scale Fidelity

Absolute Log-Linear Fidelity
(Relative to the reference condition of 25 dBm
input through the 10 dB attenuation, or 35 dBm
at the input mixer)
d
Input mixer level
80 dBm  ML  10 dBm
e
Relative Fidelity
Sum of the following terms:
high level term
instability term
slope term
a. Supplemental information: The amplitude detection linearity specification applies at all levels below 10 dBm at the
input mixer; however, noise will reduce the accuracy of low level measurements. The amplitude error due to noise is
determined by the signal-to-noise ratio, S/N. If the S/N is large (20 dB or better), the amplitude error due to noise can
be estimated from the equation below, given for the 3-sigma (three standard deviations) level.
The errors due to S/N ratio can be further reduced by averaging results. For large S/N (20 dB or better), the 3-sigma
level can be reduced proportional to the square root of the number of averages taken.
26
a
Specifications
a
0 dB
a
0 dB
Specifications
Linearity
0.15 dB

  
3 = 3 20dB log 1 +
Supplemental Information
Supplemental Information
Supplemental Information
Applies for mixer level
to 80 dBm, preamp off, and dither on
Up to 0.045 dB
Up to 0.018 dB
From equation
    20dB  
– S N + 3dB 
10
d
range from 10
f
g