HP 1660C Series Service Manual page 76

Testing Performance
To test the multiple-clock, multiple-edge, state acquisition (logic analyzer)
If you have not already created a Compare file for the previous test (single-clock,
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single-edge state acquisition, page 32), use the following steps to create one. For
subsequent passes through this test, skip this step and go to step 6.
a Press Run. The display should show an alternating pattern of "AA" and "55". Verify the
pattern by scrolling through the display.
b Press the List key. In the pop up menu, use the RPG knob to move the cursor to
Compare. Press Select.
c In the Compare menu, move the cursor to Copy Listing to Reference, then press the
Select key.
d Move the cursor to Specify Stop Measurement and press the Select key. Press Select
again to turn on Compare. At the pop up menu, select Compare. Move the cursor to
the Equal field and press the Select key. At the pop up menu, select Not Equal. Press
Done.
e Move the cursor to the Reference Listing field and select. The field should toggle to
Difference Listing.
Press the blue shift key, then press the Run key. If 2 - 4 acquisitions are obtained
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without the "Stop Condition Satisfied" message appearing, then the test passes.
Press Stop to halt the acquisition. Record the Pass or Fail results in the
performance test record.
Enable the pulse generator channel 1 COMP (with the LED on).
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Check the clock pulse width.
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a Enable the pulse generator channel 1, channel 2, and trigger outputs (with the LED
off).
b b In the oscilloscope Timebase menu, select Delay. Using the oscilloscope knob,
position the clock waveform so that the waveform is centered on the screen.
c In the oscilloscope Delta V menu, set the Marker 1 Position to Chan 2, then set
Marker 1 at −1.3000 V. Set the Marker 2 Position to Chan 2, then set Marker 2 at
−1.3000 V.
d In the oscilloscope Delta T menu, select Start On Neg Edge 1. Select Stop On Pos
Edge 1.
e If the pulse width is outside of the limits, adjust the pulse generator channel 2 width
and select the oscilloscope Precision Edge Find until the pulse width is within limits.
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