Keysight N9063C Analog Demod Measurement Guide 19
Demodulating AM, FM,
Φ
M, FM Stereo/RDS Signals
Demodulating an FM Stereo/RDS Signal
Measuring L=R FM Stereo/RDS Signals
The parameters of the signal under test are as below.
FM reference deviation: 75 kHz
Pilot deviation: 10%
Pilot frequency: 19 kHz
Stereo frequency: 38 kHz
Left = Right tone: 1.0 kHz
RDS deviation: 6%
RDS frequency: 57 kHz
Step
Action
Notes
1.
Select Analog Demod mode.
— Press
Mode
,
Analog
Demod
.
2.
Preset the mode.
— Press
Mode Preset
.
3.
Select FM Stereo/RDS
measurement.
— Press
Mode/Meas
,
FM
Stereo/RDS
.
4.
Set the center frequency to
the center of the signal and
set the AF stop frequency.
— Press
FREQ
,
Center Freq
,
98,
MHz
.
— Press
AF Stop Freq
, 65,
kHz
.
AF start frequency and AF stop
frequency settings determine the span
of the X axis in AF Spectrum window in
MPX, Mono, Stereo, Left, and Right
views.
5.
Set the FM reference
deviation.
— Press
Meas Setup
,
Ad vanced
,
Ref Deviation
,
75,
kHz
.
6.
View the measurement
result of the multiplexed
signal.
— Press
Display, View
,
MPX
.
To display only the current trace in the
Demod Waveform window, press
Meas
Setup
and toggle
Averaging
to
Off
.
Содержание N9000B CXA
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