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

Using HP-IB or HP-IL Interface Model 1630A/D/G
TT - Transmit Timing Acquisition Learn String
The transmit timing acquisition learn string command causes the 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 :
HP 1630A/D Learn String Format (for Timing Trace)
9- 1 4
SYNTAX : TT;
Starting Byte Number
Position
Of
In String Bytes Contents
1 byte per record for 8 timing channels
2 bytes per record for 16 timing channels
I
Pod 1
I I
Pod 0
I
7654321076543210
I II I
Byte 0
I I
Byte 1
I
I
18 Chan
I
16 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 .
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 2065 for 16
channels and 1041 for 8 channels .
With partial memories, the binary value of these bytes will include the last word in memory plustwo CRC bytes.
1 2 RT (Receive 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 N (I) Data File
Where N = (Number of records) " M
M = 1 byte per record for 8 channels
M = 2 bytes per record for 16 channels
CRC STOPPED ACCUMULATING WITH PREVIOUS BYTE
N + 21 2 (I) CRC