SUM Subsystem Introduction
OUTPut1 1
OUTPut2 1
This oscilloscope image produced by this code is shown below.
[SOURce[1|2]:]SUM:AMPLitude <
amplitude
>
[SOURce[1|2]:]SUM:AMPLitude? [{MINimum|MAXimum}]
Sets internal modulation depth (or "percent modulation") in percent.
Parameter
Typical Return
Desired SUM signal amplitude in percent of carrier amplitude, from 0 to 100;
default 0.1
+3.20000000000
Set the internal SUM signal amplitude to 1.0% of the signal amplitude:
SUM:AMPL 1.0
PHAS:SYNC
Set the internal sum signal amplitude on channel 2 to 0.15% of the signal amplitude:
SOUR2:SUM:AMPL 0.15
l
You can synchronize the phase between the primary signal and the
SUM
signal by sending
after setting the functions for the primary signal and the
SUM
signal. Otherwise, the phase
between the two signals is arbitrary.
l
Summed output cannot exceed ±5 V peak output (into a 50 Ω load).
l
If you select the External SUM source (
), the carrier waveform is added to the external
waveform. The summing signal is the ±5 V signal level on the rear-panel
Modulation In
connector. For example,
if you have the carrier amplitude of a sine wave set to 4 Vpp and set the Sum Amplitude to 20% (resulting in a
maximum sum contribution of 800 mVpp) using SUM:AMPLitude, then when the EXT signal is at +5 V, the addi-
tive signal output will be at the maximum amplitude of 4.8 Vpp. When the modulating signal is at -5 V, the additive
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Agilent 33500 Series Operating and Service Guide
Содержание Agilent 33500 Series
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