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SDS1000X-E User Manual
199
WWW.SIGLENT.COM
Vari-level Sweep Operation
1. Press
Utility
button on the front panel to enter the UTILITY function menu, and then
press the
Next Page
soft key to enter the second page. Press
Bode Plot Ⅱ
to enter
the BODE PLOT function menu. Press
Config
to enter Configure menu.
2. Press
Source
to enter Source menu to select the waveform generator. In this
example, press
Interface
to select “
USB
”, and then press
Connection Test
to verify
setting. Then return to the Configure menu.
Figure 139 Bode Plot Interface Connection
3. Press
Sweep Mode
to select “
Vari-level
”.
Figure 140 Vari-level Configure Menu
4. Press
Set Vari-level
to enter Vari-level editor. On the left side of the editor is a
spreadsheet which is used to specify the relationship between frequency and
amplitude. On the right side is an automatically generated stimulus voltage vs.
frequency plot.
5. The operation principle of Vari-level is simple. User specifies a series of joint, which is
defined by a given frequency and corresponding amplitude. In between two adjacent
joints, the frequency points and their corresponding amplitude are calculated
automatically by linear interpolation. The frequency of the joints is sequential, so the
frequency of the posterior joint is always higher than the frequency of the anterior joint.
And always, the first and the last joint defines the start and stop frequency.
6. Press
Profile
and use the
Universal Knob
to select “
Profile A
”. As you can see, up to
4 profiles can be saved.
7. In this example, I will demonstrate how to specify a Vari-level profile widely used in
testing power supply loop response. The profile is a 4-joint- polyline with large
stimulus amplitude in low frequency and small amplitude in high frequency, and
gradual amplitude in intermediate frequency.
8. Press
Joints
and use the
Universal Knob
to set the number of joint to 4.
9. Press
Edit Table
to activate the spreadsheet editor. When the spreadsheet editor is
activated, press
Edit Table
will cycle the cursor between frequency, amplitude and
the entire column. Then use the
Universal Knob
to adjust the frequency, the
amplitude, or to select the column to be edited. Press the
Universal Knob
will activate
the visual keypad for more precise input.
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