Verify The Test Signal - Agilent Technologies 1670G Series Service Manual

Verify the test signal

Check the clock period. Using the oscilloscope, verify that the master-to-master
1
clock time is 6.666 ns, +0 ps or −100 ps.
a In the oscilloscope Timebase menu, select Scale: 1.000 ns/div.
b In the oscilloscope Timebase menu, select Position. Using the oscilloscope knob,
position the clock waveform so that a rising edge appears at the left of the display.
c On the oscilloscope, select [Shift] Period: channel 2, then select [Enter] to display the
clock period (Period(2)). If the period is not less than 6.666 ns, go to step d. If the
period is less than 6.666 ns, go to step 3.
d In the oscilloscope Timebase menu, increase Position 6.666 ns. If the period is not less
than 6.666 ns, decrease the pulse generator Period in 10 ps increments until one of the
two periods measured is less than 6.666 ns.
Check the data pulse width. Using the oscilloscope, verify that the data pulse width
2
is 3.000 ns, +0 ps or −100 ps.
a In the oscilloscope Timebase menu, select Position. Using the oscilloscope knob,
position the data waveform so that the waveform is centered on the screen.
b On the oscilloscope, select [Shift] + width: channel 1, then select [Enter] to display the
data signal pulse width (+ width(1)).
c If the pulse width is outside the limits, adjust the pulse generator channel 2 width until
the pulse width is within limits.
To test the single-clock, single-edge, state acquisition (logic analyzer)
Testing Performance
3–23