Ramp Waveform - Keithley 3390 User Manual

Section 5: Waveform Output Operations
Figure 5-4:
Setting up a square waveform
To generate a square waveform from a remote interface:
APPLy:SQUare [<frequency>[,<amplitude>[,<offset>]]]
or
FUNCtion {SQUare}
FREQuency {<frequency>|MINimum|MAXimum}
VOLTage {<amplitude>|MINimum|MAXimum }
VOLTage:OFFSet {<offset>|MINimum|MAXimum }
FUNCtion:SQUare:DCYCle {<percent>|MINimum|MAXimum }

Ramp waveform

A ramp waveform is a triangle waveform with adjustable symmetry. Symmetry represents the
percentage of time in a cycle when the ramp waveform is rising (waveform polarity is not inverted).
The default symmetry is 100%.The symmetry value is stored in volatile memory and it will be
restored after power-off or a remote interface reset. During operation, if the output function is
changed from ramp waveform, the symmetry is stored in memory and will be resumed when ramp
waveform is re-selected (until instrument power off). The symmetry setting is not applicable when
ramp waveform is used as the modulating waveform for AM, FM, PM, or PWM.
To generate a ramp waveform:
1. Press the Ramp key.
2. Refer to
period, amplitude, and DC offset voltage
3. Press the soft key under Symmetry. Use the navigation wheel with the cursor keys to
change the value, and then press another soft key to finish the entry and exit. Or use the
numeric keypad to enter a desired value and then press the soft key under % to finish the
entry or the soft key under Cancel to cancel the changes.
4. Press the Graph key to view the waveform parameters in the graph mode.
Figure 5-5:
Setting up a ramp waveform
To generate a ramp waveform from a remote interface:
APPLy:RAMP [<frequency>[,<amplitude>[,<offset>]]]
(The command generates a ramp waveform with 100% symmetry.)
or
FUNCtion {RAMP}
FREQuency {<frequency>|MINimum|MAXimum}
VOLTage {<amplitude>|MINimum|MAXimum }
5-4
Section 4, Setup Basics
Return to
Section Topics
Model 3390 Arbitrary Waveform Generator User's Manual
for configuring common parameters including frequency/
(Figure
5-5).
3390-900-01 Rev. C / January 2009