HP 16555A, 16555D, 16554A manual Data Preamble Description

DATA and SETup Commands

Data Preamble Description

Byte Position

614 bytes - Tag type for state mode in one of the following decimal values: 0 = off

1 = time tags

2 = state tags

658 bytes - Trigger offset. The time offset (in picoseconds) from when this analyzer is triggered and when this analyzer provides an output trigger to the IMB or port out. The value for one analyzer is always zero and the value for the other analyzer is the time between the triggers of the two analyzers.

7330 bytes - Unused

10370 bytes - The next 70 bytes are for Analyzer 2 Data Information. They are organized in the same manner as Analyzer 1 above, but they occupy bytes 103 through 172.

17388 bytes - Number of valid rows of data (starting at byte 591) for each pod. Bytes 173 through 212 Unused

Bytes 213 through 216 contain the number of valid rows of data for pod 4 of the highest card slot expansion card in a three-card module.

Bytes 217 through 220 contain the number of valid rows of data for pod 3 of the highest cardslot expansion card in a three-card module.

Bytes 221 through 224 contain the number of valid rows of data for pod 2 of the highest cardslot expansion card in a three-card module.

Bytes 225 through 228 contain the number of valid rows of data for pod 1 of the highest cardslot expansion card in a three-card module.

Bytes 229 through 232 contain the number of valid rows of data for pod 4 of either the expansion card in a two-card module, or a middle cardslot expansion card in a three-card module.

Bytes 233 through 236 contain the number of valid rows of data for pod 3 of either the expansion card in a two-card module, or a middle cardslot expansion card in a three-card module.

Bytes 237 through 240 contain the number of valid rows of data for pod 2 of either the expansion card in a two-card module, or a middle cardslot expansion card in a three-card module.

17–9