Keysight M9290A Manual page 85

Frequency Mod ulation
Description
Post-Demod Distortion Residual
b
Distortion (SINAD)
THD
Post-Demod Distortion Accuracy
(Rate: 1 to 10 kHz,
ModIndex: 0.2 to10)
b
Distortion (SINAD)
d
THD
Distortion Measurement Range
Distortion (SINAD)
THD
e
AM Rejection
(50 Hz HPF, 3 kHz LPF,
15 kHz Channel BW)
f
Residual FM
(50 Hz HPF, 3 kHz LPF, any
Channel BW)
(50 Hz HPF, 3 kHz LPF, 15 kHz
Channel BW)
Hum & Noise
(50 Hz HPF, 3 kHz LPF, 15 kHz
Channel BW, 750 S de-emph;
relateive to 3 kHz pk deviation)
a.
For optimum measurement, ensure that the Channel BW is set wide enough to capture the significant RF energy.
Setting the Channel BW too wide will result in measurement errors.
b. SINAD [dB] can be derived by 20 log10(1/Distortion).
c.
The DistResidual term of the Distortion Accuracy specification contributes when the Reading term is small.
d.
The measurement includes at most 10
e.
AM rejection describes the instrument's FM reading for an input that is strongly AMed (with no FM); this specifi-
cation includes contributions from residual FM.
f.
Residual FM describes the instrument's FM reading for an input that has no FM and no AM; this specification
includes contributions from FM deviation accuracy.
Specifications
a
th
harmonics.
Supplemental Information
0.30% (nominal)
1/2
0.4%/(ModIndex) (nominal)
2  Reading  DistResidual)
2  Reading  DistResidual) (nominal)
Residual to 100% (nominal)
Residual to 100% (nominal)
The applied AM signal (Rate = 1 kHz, Depth =
50%)
4.0 Hz FM peak
2.0 Hz rms (nominal)
1.0 Hz rms (nominal)
72 dB (nominal)
c
(nominal)
85