Performance Tests
TDS 500B, 600B and TDS 700A Service Manual
4–41
(Press SELECT to switch between the two cursors.) See Figure
4–11 on page 4–41.
H Read the measurement results at the D: cursor readout, not the @:
readout on screen.
Locate the time reference
points for these waveforms.
2
Display the waveforms.
1
Read results.
4
Align each cursor to the time
reference points
3
Figure 4–11: Measurement of Channel Delay – TDS 684B Shown
g. Check against limits: CHECK that the cursor readout on screen is
≤100 ps for the TDS 600B or ≤50 ps for the TDS 500B/700A.
h. If the channel skew is within the limits, enter time on the test record and
proceed to step 3. Otherwise, proceed with steps i through p.
i. Use the cursors to measure the skew from CH1 to CH2, CH1 to CH3,
and CH1 to CH4 (on the TDS 520B, 620B, 680B, and 724A use AX1
and AX2 instead of CH3 and CH4). Write down these three numbers in
the first measurement column of Table 4–5. Note that these numbers
may be either positive or negative.
j. Repeat the procedure from step 1.c through 2.e.
k. Again use the cursors to measure the skew from CH1 to CH2, CH1 to
CH3, and CH1 to CH4. Write down these numbers in the second
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