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Electrical Sampling Modules
3.
Push the
DEFAULT SETUP
front-panel button and click
Yes
.
4.
Set up the main instrument as follows:
a.
In the TDR Setup dialog box, click
C1
Preset. This sets up Channel 1
(C1) positive polarity by default; it will later be manually switched to
select negative polarity and for channel 2, during the test sequence.
b.
In the Acq Setup dialog box set the Acquisition Mode to
Average
,
128
samples.
c.
In the Horz Setup dialog box:
Set Record Length to
2000 points
.
Set Position to
1
μ
s
.
Set Scale to
100 ns/div
.
d.
In the Meas Setup dialog box:
Select
Meas 1
and make sure the
Source1
button is selected.
Make sure the channel under test is selected in the Source tab, click
the
Pulse
Signal Type button, and then choose
Select Meas > Pulse –
Amplitude > Mean
.
e.
Record for later use the High measurement value in mr, making sure to
take down the proper sign. This will be used as HiRef, the high reference
level for aberration measurements.
Test
Follow this procedure to make the aberration checks:
1.
Check aberrations in the range of 10 ns to 20 ps before the edge (aberrations
within ±3%.
a.
Set the Horizontal Position to
0
(or to the minimum value possible).
b.
Change the Horizontal Scale to
50 ps/div
while adjusting Horizontal
Position to keep the rising edge of the
fi
rst step waveform on screen.
c.
Push the front panel
FINE
button to turn it on.
d.
Adjust the Horizontal Position knob so the waveform crosses the center
vertical graticule at the 10% (amplitude) point of the rising edge. Since
the waveform is 2 major divisions high at 500 m
ρ
/div, the waveform
should be crossing the center vertical graticule at 9 minor divisions below
the center horizontal graticule. This de
fi
nes the ending reference point for
pre-transition aberration measurements.
e.
Push the
FINE
button to turn it off.
DSA8300 Performance Veri
fi
cation
207
Содержание 80A00
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Страница 16: ...Important safety information x DSA8300 Performance Verification ...
Страница 213: ...Electrical Sampling Modules Figure 21 Setup to measure Power in DSA8300 Performance Verification 195 ...