Agilent Technologies Agilent 33500 Series Operating And Service Manual page 295

SUM Subsystem Introduction
between the two signals is arbitrary.
This command is applicable only with internal sum source
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You cannot use SUM when DC is the carrier.
l
An arbitrary waveform may not simultaneously be a carrier and a sum waveform.
l
The following table shows which carriers can be associated with which internal functions.
Carrier
Sine
Square/Pulse
Triangle/Ramp
Gaussian Noise
PRBS
Arbitrary
Sequenced Arbitrary
[SOURce[1|2]:]SUM:SOURce {INTernal|EXTernal}
[SOURce[1|2]:]SUM:SOURce?
Selects source of summing signal.
Parameter
{INTernal|EXTernal}, default INTernal
Set the sum source to EXTernal:
SUM:SOUR EXT
You can synchronize the phase between the primary signal and the SUM signal by sending
l
ASe:SYNChronize after setting the functions for the primary signal and the SUM signal. Otherwise, the phase
between the two signals is arbitrary.
SUM:SOURce EXTernal: carrier waveform is summed with external waveform. The amplitude and polarity of
l
the sum signal is determined by the ±5 V signal level on rear-panel Modulation In connector. For example, if you
have set the SUM Amplitude to 2.0 Vpp using SUM:AMPLitude, then when EXT signal is at +5 V, the sum signal will
be at 2 Vpp. When the modulating signal is at -5 V, the sum signal will be at full amplitude and opposite polarity.
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Modulating Signal
Sine Square Tri / Ramp
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Typical Return
INT or EXT
(SUM:SOURce INTernal).
Noise PRBS Arb External
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Agilent 33500 Series Operating and Service Guide
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SOURce[1|2]:PH-