Performance Tests
TDS 420A, TDS 430A & TDS 460A Service Manual
4-37
Check that the waveform rising
edge is within ±0.5 horizontal
divisions on the center
horizontal graticule line.
Enter a 10.0 s delay and set the horizontal
scale for the D time base to 100 ns.
Set the
delayed
horizontal
modes.
1
2
3
Figure 4- 11: Measurement of Accuracy — Long-Term and Delay-Time
H Set the horizontal SCALE of the D (delayed) time base to 500 s.
(The scale of the Main time base will also change.)
H Use the General Purpose knob to set Delayed Runs After Main
to 1.00 ms.
H Use the horizontal SCALE knob to set the D (delayed) time base
to 100 ns.
H CHECK that the rising edge of the waveform crosses the center
horizontal graticule line at a point within ±1.5 divisions of the
center graticule.
3. Disconnect the hookup: Disconnect the cable from the time standard at the
input connector of CH 1.
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