Figure 7-5. Timing Trace Specification For Combined State/Timing Measurements - HP 1630A Operating And Programming Manual

Model 1630A/D/G
Interactive State and Timing Measurements
Trace Specification---_-------__-----------------------
Trace Mode Master
- . [ 10 G]
Cstart I -
a n 1 sl - - -
Label> B
Base >
Pattern
And Any
Edge
Valid Pattern Duration >
Figure 7-5. Timing Trace Specification For Combined State/Timing Measurements
13 . Move the cursor down into the Edge field and use the NEXT[] key to enter a positive-going transition
requirement (up arrow) for channel B2 (third from right-hand side) of the timing pod .
14 . Press the RUN key. The state measurement in the analyzer will be completed as before . After the state
trigger has been found, the timing function will search for the timing trigger . If itfindsthetiming trigger,
it will complete its trace and show a waveform display. If it does not find its trigger, the analyzer will show
the message "Waiting for Timing Trigger" on screen . In this case, press the STOP key. The message on
screen will show "Trace Aborted" . There will be waveforms displayed.
15 . Press the LIST key two times. The trace list that was completed by the state measurement function will
be displayed. It will show the state trigger on screen, along with other states it captured .
16 . Press the TRACE key two times. This will place the trace specification for the timing function on screen .
17 . Move the cursor down into the Pattern field and press and hold the DON'T CARE key until the field is all
"X's" . This can also be done by pressing CLEAR ENTRY. Now the timing analyzer trigger will be satisfied
when the first low-to-high edge is found on channel 2 in pod 0.
18 . Press the RUN key. The analyzer will search through the incoming states until it finds the state trigger.
When it finds the state trigger, it will begin capturing states into memory, and at the same time, it will arm
the timing analyzer to search for its trigger. The timing analyzerwill monitorthe incoming activity until it
finds a rising edge on bit B2 . Then it will store a series of samples of activity to complete its timing
measurement. It will show "Trace Complete" on the top of the screen, and waveforms of timing
information across the display. See figure 7-6.
19 . Press the TRACE key. See figure 7-7.
20 . Move the cursor into the "Master" field and press the NEXT[] key to change [State] to [Timing] . This
makes the analyzer recognize its timing trigger before it can arm the state function to recognize the state
trigger.
21 . Press the RUN key. The analyzer will begin its measurement by looking for the condition that satisfies its
timing trigger. When it finds this condition (rising edge on B2), it starts collecting timing information,
and arms the state measurement function to look for its trigger. The timing analyzer displays its
waveform information on screen while the state function completes its measurement.
22 . Press the LIST key. The display will show a listing of the timing activity . See figure 7-8.
7- 5