Tt - Transmit Timing Acquisition Learn String - HP 1630A Operating And Programming Manual

Model 1630A/D/G
Using HP-IB or HP-IL Interface
TT - Transmit Timing Acquisition Learn String
The transmit timing acquisition learn string command causes the HP 1630G analyzer to transmit a string
containing its timing measurement data plus two CRC bytes. Glitch information will also be transmitted if the
analyzer is in the glitch mode of operation .
The actual timing data is transmitted as in the following manner :
1 byte per record for 8 channels
Pod 0
76543210
Byte 0
8 chan
When the contents of the acquisition is formatted as real data (R), the number refers to number of marks or
number of sample period intervals .
HP 1630G Learn String Format (for Timing Trace Learn)
SYNTAX : TT;
Starting Byte Number
Position
Of
In String- Bytes Contents
Note
The binary value of these bytes is the number of bytes to follow including the CRC bytes. The
maximum binary number, if the memory is full, is 10491 for 8 channels . With partial memories,
the binary value of these bytes will include the last word in memory plus two CRC bytes .
1 2
(A) AT (Accept Timing Command)
3
2
(I) Binary byte count (refer to Note)
CRC STARTS ACCUMULATING WITH NEXT BYTE
5
1
(I) Number of timing channels
6 2
(I) Number of valid timing states
8 2
(I) Index of the tracepoint state
10
1 (S) Glitch mode on
11
2 (T) Sample period
13
7
(I,B) Date/Time information
20
2
(I) Number of units to start trace after trigger
22
1
(I) Units for byte 20 (0=ns, 1=us, 2=ms, 3=s)
23
4
(R) Valid pattern duration
27
1
(S) State was master
28 N
(I) Data File
Where: N = Number of records
CRC STOPPED ACCUMULATING WITH PREVIOUS BYTE
N + 28
2 (I) CRC