21 | Keysight | M9393A PXIe Performance Vector Signal Analyzer – Data Sheet
Description
Specifications
Supplemental Information
Noise figure uncertainty calculator60
Instrument noise figure uncertainty
Instrument gain uncertainty
Instrument noise figure
See the noise figure table earlier in this chapter
See the gain table earlier in this chapter
See graphs of “nominal instrument noise
figure”; noise figure is DANL + 176.24 dB
(nominal)61
Instrument input match
See graphs: nominal VSWR
60. The Noise Figure Uncertainty Calculator requires the parameters shown in order to calculate the total uncertainty of a Noise Figure measurement.
61. Nominally, the noise figure of the spectrum analyzer is given by NF = D — (K — L + N + B) where D is the DANL (displayed average noise level)
specification, K is kTB (-173.98 dBm in a 1 Hz bandwidth at 290 K) L is 2.51 dB (the effect of log averaging used in DANL verifications) N is 0.24 dB
(the ratio of the noise bandwidth of the RBW filter with which DANL is specified to an ideal noise bandwidth) B is ten times the base-10 logarithm of
the RBW (in hertz) in which the DANL is specified. B is 0 dB for the 1 Hz RBW. The actual NF will vary from the nominal due to frequency response
errors.
Nominal instrument NF, 0.01 to 3.6 GHz, range = -28 dBm
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