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State Measurements
Model 1630A/D/G
THE STATE FORMAT SPECIFICATION
The State [Assignment] Format Specification
The logic analyzer must acquire data from the target system in exactly the same manner as the target system
interprets the data . Therefore, the clock assignments and voltage thresholds utilized by the system must also
be used by the logic analyzer . The logic analyzer must see the exact information that the target system sees .
The type of information is specified in the analyzer with the State [Assignment] Format Specification menu .
The State [Assignment] Format Specification menu is also used to group incoming channels and assign
names (labels) to the groups . Assigning labels to groups (such as the address, data and status channels)
makes the data displayed on the logic analyzer much easier for the user to interpret and analyze .
Figures 4-3a and 4-3b are the default State Format Specification menus that are displayed on the 1630A/D and
1630G when the FORMAT key is pressed . When the analyzer runs a trace, only probe channels assigned to a
label are displayed in the listing. All channels on the 1630A/D are defaulted to label "A" . The 1630G assigns
channels from pods 5, 6, and 7 to label "AO" and channels from pods 1 through 3 to label "A1" . All probe
channels are initially assigned to a label so when a trace is listed, all channels are included in the listing . All
channels not connected are indicated by a zero in the State Listing .
NOTE
The arrows at the left and right of the label fields in figure 4-3b indicate there are more bits
assigned to the left of label AO and to the right of label A1 .
State Format Specification --------------------------------______
Multiplexing
Pod4
Pod3
Pod2
Podl
PodO
8 . . . . . . .0 8 . . . . . . .0 8 . . . . . . .0 7 . . . . . .0 7 . . . . . .0
flctivity>
-----1111 -1111112 111111111 IIIIIIII _____I__
Label
Pol
Figure 4- 3a . 1630AID Default State Format Specification Menu
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