Specifications

Using the DMM and ARB 73Chapter 4
Downloading a Swept Sine Waveform
The “Arb_Dl_Swept_Sine” and “Arb_Dl_Swept_Sine_Ex” actions perform
frequency sweeps of sine waves. The “Arb_Dl_Swept_Sine” action only
sweeps in the forward direction. The “Arb_Dl_Swept_Sine_Ex” action can
sweep in both forward and reverse directions with a selectable delay
between sweeps (i.e., last frequency remain for the selected time).
Testplan ‘arbsweep.tpa’ illustrates how to output a sine wave sweep
using both actions. In one test, the sine wave sweeps from 1 kHz to 2 kHz
with a sweep time of 0.5 seconds. In another test, the sine wave sweeps from
1 kHz to 2 kHz in both forward and backwards directions with a sweep time
of 0.2 seconds. In the The latter test, the last frequency is held for 0.5
seconds before the next sweeps is initiated. A review of the testplan is
below.
Note The number of segments needed to generate the swept sine waves depend
on the frequency span between the start and end frequencies, and the sweep
time. Large spans and/or sweep times could exceed the maximum
allowable segments.
Test Group/Test/Action Name Description
testgroup Arb sine sweeps Sweeps Arb sine waves.
Switching Connect Arb channel 1 output to ABus1 and UUT Common.
test setup Arb Setup arb output circuitry.
arbConfOutControls Configures Arb’s output circuitry.
arbSet Sends setup data to Arb.
test setup forward sweep Sweeps a sine wave in the forward direction.
Arb_Dl_Swept_Sine Downloads a sine wave for a forward sweep from 1 kHz to 2 kHz for a time
of 0.5 seconds.
test setup forward & reverse sweeps Sweeps a sine wave in both forward and reverse direction.
Arb_Dl_Swept_Sine_Ex Downloads a sine wave for a forward and reverse sweep from 1 kHz to 2
kHz for a time of 0.2 seconds with a delay of 0.5 seconds between sweeps.
test execute sweeps Execute both sweeps.
arbInitiate Initialize the Arb to output the waveform. Start outputting the waveform. The
Arb at this time outputs the last downloaded waveform (i.e., forward and
reverse sweep).
Arb_Select_Wave_By_Name Selects and outputs the waveform using the name entered in the
‘waveform_name’ parameter (i.e., “wave1”).
DialogOkay This optional action is used here to view the current waveform (i.e., forward
sweep).
Arb_Select_Wave_By_Name Selects and outputs the waveform using the name entered in the
‘waveform_name’ parameter (i.e., “wave2”).
DialogOkay This optional action is used here to view the current waveform (i.e., forward
and reverse sweep).
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