Model 6220/6221 Reference Manual Wave Functions (6221 Only) 7-29
Return to Section 7 topics
2. SOUR:WAVE:DCYC <NRf> ‘ Set duty cycle
This command sets the duty cycle for square and ramp waveforms. For a
square wave, the duty cycle is the portion of the total cycle that the wave is
high. For a ramp waveform, the duty cycle corresponds to the fraction of the
total wave cycle that is rising. If this command is sent when the waveform is
armed, the Model 6221 will re-arm itself. If the waveform must be reloaded
while the output is enabled, the inactive value will be output during this period.
The duty cycle selection only applies for square and ramp waveforms and is
ignored for others.
3. SOUR:WAVE:AMPL <NRf> ‘ Set amplitude
This command sets the peak amplitude for all waveforms. The peak amplitude
is one-half the peak-to-peak value. For example, an amplitude of 100mA
results in a peak-to-peak value of 200mA. For fixed ranging, the offset plus
peak amplitude cannot exceed the selected range.
4. SOUR:WAVE:FREQ <NRf> ‘ Set frequency
This command sets the frequency for all waveforms. The maximum frequency
for all waveforms is 100kHz.
5. SOUR:WAVE:OFFS <NRf> ‘ Set offset
This command allows you to add a DC offset to a waveform. For fixed ranging,
the offset plus amplitude cannot exceed the selected range.
6. SOUR:WAVE:RANG <name> ‘ Set range mode
Selects whether to use the best-fixed range or whether to use a fixed range. If
best range is selected, the source range will automatically be selected based
on the source values. For fixed range, the source range will be left on the
range it was at when the waveform is started. If the present current range is
too low when the waveform is started, Error -222 Parameter Out of Range is
generated, and the waveform does not initiate. This command is not accepted
while the wave is armed (Error +404 Not allowed with Wave Armed).
7. SOUR:WAVE:PMAR <NRf> ‘ Set marker phase
SOUR:WAVE:PMAR:STAT <b> ‘ Enable/disable phase marker
SOUR:WAVE:PMAR:OLIN <NRf> ‘ Set phase marker output line
Use these commands to enter the point in degrees (0-360) at which a 1μs out-
put trigger pulse will be issued, enable/disable the phase marker, and select
the phase marker output line on the trigger connector. Note that the phase
marker output line cannot be the same as the trigger layer output trigger line
(usually 2 at default) or the waveform external trigger line. Attempts to set the
phase marker line to the same line as either of these returns Error -221 Set-
tings Conflict. See “External trigger connector,” on page 8-13 for trigger con-
nector details.
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