[Compare/Edit Compare/Full Compare] Trace Modes; Figure 4-35 . [Compare/Edit Compare] State Trace Specification - HP 1630A Operating And Programming Manual

Model 1630A/D/G
State Measurements
[Compare/Edit Compare/Full Compare] Trace Modes
The compare modes of the 1630 Logic Analyzers provide the means to compare traces with previously stored
data . In the compare mode, a trigger point is specified and traces are compared with a previously defined
compare list of data . The compare modes are useful for production line testing and fault analysis . The trace is
checked at selected points with reference to the trigger. For example, a compare list might specify the value
FFFF (hex) should be found in the fifth transaction (line + 0005 in the trace memory) after the trigger.
The [Compare] mode of the 1630A/D has been renamed the [Edit Compare] on the 1630G but operates the
same . Up to 16 events may be specified to set a basis for comparison for continuous state flow . The
comparison events need not be continguous, but rather are defined by line number in 1630 memory . The
compare termination condition may be set for a trace that matches the comparison sequence (compare trace
mode [until =] ), or when a new state flow fails to match the compare list (compare trace mode [until #] ) .
1 . Press TRACE and use the NEXT[] or PREV[] key to select [Compare] on the 1630A/D or [Edit
Compare] on the 1630G.
2 . Enter the parameters shown in figure 4-35 . The relocation and user base information is the same as
previously set up in figures 4-10 and 4-13 .
' . otate Trace Specification-------------------------------------
trace mode
In sequence
find
f 1
f i 7
L , i I
Sequence restart on
Label', RDDR
DATA STRT
Base '"
I IDIL 1
or ing
oring
firing
race on
foring
then store
Figure 4-35 . [Compare/Edit Compare] State Trace Specification
3. Press RUN to obtain a listing which will be used to compose a compare image. When in a compare
mode, the analyzer takes continuous traces . Press STOP to switch into single trace mode and obtain a
state listing .
4. The trace will be displayed in the [Compare + State] Listing.
5. Select [Mark] and [Compare Image] to make a compare list .
6. Choose 5 lines for compare events . In figure 4-36 lines -1, 2, 6, 9, and 13 have been selected .
a. Move the cursor to the inverse video field at the center of the listing.
b. Use the ROLL keys to place each line to be inserted in the inverse video field .
c . Press INSERT . The line is entered into the compare list and is marked by inverse video .
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