Performance Tests
4-22
17. Set the delayed sec/div scale
as
follows:
•
TAS475-20ns
•
TAS
485 - 10
ns
18. Using the General Purpose Knob, set the delay time
as
follows:
•
TAS475-3ns
•
TAS
485
-1.5
ns
19.
Position the edge of the second time mark to the second vertical
graticule line.
20.
Check that the Time Mark
to
Graticule Accuracy over the center eight
divisions are within the
limits shown for each sec/div scale listed
in
Table 4-4 (disregard the Time Cursor Readout Accuracy column).
21. Set MAIN to On.
22. Set the main sec/div
scale
as
follows:
•
TAS
475 - 20
ns
•
TAS
485 - 10
ns
23. Set MAIN to Off.
24. Press the MAG button, turning magnification on.
25. Set the time mark generator for 5 ns markers.
26. Set the
volts/div scale
to
200
mY.
27. Check that the timing accuracies at the beginning, middle, and end of
sweep over the center eight divisions are within the
limits shown for
each of the sec/div
scales given
in
Table 4-5. Exclude the first and last
five divisions of the magnified sweep for accuracy measurements.
Table 4-5: Time Base
Accuracy
(Mag On)
Sec/Div
Scale Time Marker
Time Mark
to
Graticule
(Mag On)
Setting Over Center 8
Divisions
1
ns
4
5 ns
1
±0.24 division
3
2
ns
5
ns
1
±0.24
division
2
5
ns
5
ns
1
±0.24
division
10
ns
10 ns
±0.24
division
100
ns
0.1
I..ls
±0.24
division
100ilS
0.1
ms ±0.24 division
1 Change the volts/div scale as necessary
to
maintain vertical amplitude.
2
At
this
setting,
two
cycles
of
the signal are displayed
for
every five horizontal divisions .
3 At
this
setting, one cycle
of
the signal is displayed
for
every five horizontal divisions.
4 The 1
ns
sec/div scale is only available on the TAS 485.
Performance Verification
•
•
•
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