2-10
Modulate
or
Sum
the
Signals
A
B
How
to
Set
up
Shdtaneous
Mod&tion
Simultaneous modulation occurs when multiple modulation modes
are applied to a single camer. The HP
8904A
makes it easy to
simultaneously modulate Channel
A
using the five modulation
modes
(AM,
FM,
OM,
DSB
or Pulse). In the following demonstration,
you
will
configure Channel C to pulse modulate Channel
A
at the
same time that Channel
B
is amplitude modulating Channel
A.
out
1
20k
3v
0.0
deg
Sine
AM
1000
Hz
90%
0.0
deg Sine
Note
If
you have just completed the preceding demonstration,
"How
to
Modulate Channel
A,"
your
HP
8904A
is correctly configured
for
beginning this demonstration; proceed to step
1
on
the next page.
If
your
HP
8904A
is not configured as shown in Table
2-1,
please configure Channels
A
and
B
as shown in the table before
you begin this demonstration.
Table
2-1.
Instrument Settings for Channels
A
and
B.
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