Clipping-To-Noise Dynamic Range - Keysight M9290A Manual

Clipping-to-Noise Dynamic Range

Description
Clipping-to-Noise Dynamic Range
Clipping Level at Mixer
IF Gain = Low
IF Gain = High
Noise Density at Mixer
b
at center frequency
a. This specification is defined to be the ratio of the clipping level (also known as "ADC Over Range") to
the noise density. In decibel units, it can be defined as clipping_level [dBm]  noise_density [dBm/Hz];
the result has units of dBfs/Hz (fs is "full scale").
b. The noise density depends on the input frequency. It is lowest for a broad range of input frequencies
near the center frequency, and these specifications apply there. The noise density can increase toward
the edges of the span. The effect is nominally well under 1 dB.
c. The primary determining element in the noise density is the
page 29 .
d. DANL is specified for log averaging, not power averaging, and thus is 2.51 dB lower than the true
noise density. It is also specified in the narrowest RBW, 1 Hz, which has a noise bandwidth slightly
wider than 1 Hz. These two effects together add up to 2.25 dB.
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Specifications
a
c d
DANL + 2.25 dB
Supplemental Information
Excluding residuals and spurious responses
Center frequency  20 MHz
12 dBm (nominal)
22 dBm (nominal)
"Displayed Average Noise Level (DANL)" on