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ME1110 Digital Modulation Technique
Quick Start Guide - 10/16
Step 3:
Displaying the Modulated IQ Signals in the 89601 VSA Software (cont.)
In the VSA software
window, select
Utilities >
Frequency Reference
.
Select
Internal
to use the
internal clock from the
oscilloscope.
Select
MeasSetup >
Frequency.
Set the
center frequency to
10
MHz
and the frequency
span to
3 MHz
, as shown
at the side.
Select
MeasSetup >
Measurement Type >
Digital Demod
to
demodulate the QPSK
signal.
Select
MeasSetup >
Digital Demod Properties
to set the demodulation
properties. In the
Format
tab, set the following
parameters:
Format =
QPSK, Symbol Rate = 1
MHz, Points/Symbol = 4,
and
Result Length = 80
Symbols.
A warning about
insufficient data for digital
demodulation may appear.
Ignore this and continue
with the setup, then click
the
Run
button.
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