Tektronix WCA200A, User Manual

Page: 163 / 454

Modulation Analysis (Demod Mode)
WCA230A & WCA280A User Manual
3- 37
Analog Modulation Analysis
You can select the following measurement items with the MEASURE key when
you select Analog Demod in the Demod menu.
H
AM Demod page 3--39
H
FM Demod page 3--40
H
PM Demod page 3--41
H
IQ versus Time page 3--42
H
Pulse Spectrum page 3--43
Follow this procedure to perform analog modulation analysis:
1. Press the MODE: DEMOD key on the front panel.
2.
Press the
Analog Demod
side key.
3.
Select a measurement item.
4.
Display the measurement waveform:
NOTE
. You should set appropriate frequency and span. It is important to set
frequency and span as close to the measurement signal band as possible and
finely adjust them. The modulated signal will not be recognized unless frequency
and span are set appropriately.
For information about setting frequency, span, and amplitude, refer to Setting
Frequency and Span
on page 3--119 and
Setting Amplitude
on page 3--127.
a. Set frequency by pressing the FREQUENCY/CHANNEL key on the
front panel.
b. Set span by pressing the SPAN key on the front panel.
c. Set amplitude by pressing the AMPLITUDE key on the front panel.
5. Set analysis range by pressing the TIMING key on the front panel.
Refer to page 3--30 for information about setting the analysis range.
6. Set the measurement parameters by pressing the MEAS SETUP key on the
front panel. For the Meas Setup menu, refer to the following sections.
Basic Procedure