TAS 200 Series Performance Verification
Handheld and Benchtop Instruments Basic Service
15
Table 15: Standard Time Base Accuracies
HORIZONTAL
SEC/DIV
Time Marker
Setting
Time Mark to Graticule Accuracy
Over Center 8 Divisions
.1 ms 0.1 ms ±0.24 division
.2 ms 0.2 ms ±0.24 division
.5 ms 0.5 ms ±0.24 division
1 ms 1 ms ±0.24 division
2 ms 2 ms ±0.24 division
5 ms 5 ms ±0.24 division
10 ms 10 ms ±0.24 division
20 ms 20 ms ±0.24 division
50 ms 50 ms ±0.24 division
.1 ms 0.1 ms ±0.24 division
.2 ms 0.2 ms ±0.24 division
.5 ms 0.5 ms ±0.24 division
1 ms 1 ms ±0.24 division
2 ms 2 ms ±0.24 division
5 ms 5 ms ±0.24 division
7. Set the oscilloscope HORIZONTAL SEC/DIV control to either .5 ms
(TAS 220) or .1 ms (TAS 250).
8. Set the oscilloscope HORIZONTAL X10 MAG push switch to the on
position (in).
9. Set the time mark generator to 20 ns.
10. Position the edge of the second time mark to the second vertical graticule
line of the oscilloscope display.
11. Verify that the time mark to graticule accuracy over the center eight divisions
is within the limits shown for each HORIZONTAL SEC/DIV setting listed
in Table 16.
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