Agilent Technologies Agilent 33500 Series Operating And Service Manual page 162

Pulse as Selected Function: The pulse width or pulse duty cycle deviation is controlled by the ±5 V signal
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level present on the rear-panel Modulation In connector. For example, if you have set the pulse width devi-
ation to 50 μs using the PWM:DEViation command, then a +5 V signal level corresponds to a 50 μs width
increase. Lower external signal levels produce less deviation.
With EXTernal source, the output phase (BPSK) or frequency (FSK) is determined by the signal level on the rear-
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panel Ext Trig connector. When a logic low is present, the carrier phase or carrier frequency is output. When a
logic high is present, the phase shifted phase or hop frequency is output.
The maximum external BPSK rate is 1 MHz, and the maximum FSK rate is 1 MHz.
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Note: the connector used for externally-controlled BPSK or FSK waveforms (Trig In) is not the same connector
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that is used for externally-modulated AM, FM, PM, and PWM waveforms (Modulation In). When used for BPSK or
FSK, the Trig In connector does not have adjustable edge polarity and is not affected by the
command.
With INTernal source, the rate at which output phase (BPSK) or frequency (FSKey) "shifts" between the carrier
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phase or frequency and the alternate phase or frequency is determined by the BPSK rate (BPSK:INTernal:RATE) or
FSK rate (FSKey:INTernal:RATE).
A channel may not be its own modulation source.
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See Also
AM Subsystem
BPSK Subsystem
FM Subsystem
FSKey Subsystem
PM Subsystem
PWM Subsystem
Agilent 33500 Series Operating and Service Guide
[SOURce[1|2]:]AM:SOURce
TRIGger[1|2]:SLOPe
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