HP 1630A Operating And Programming Manual page 118

Model 1630A/D/G
Using HP-IB or HP-IL Interface
HP 1630A/D Learn String Format (for State Trace Data) :
SYNTAX : TS ;
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. This value is transmitted as MSB first and LSB last . The maximum
number of bytes that can be transmitted is 4111 for 27 channels and 5135 for 35
channels .
1 2 (A) RS (Receive State Command)
3 2 (I) Binary byte count (refer to Note)
CRC STARTS ACCUMULATING WITH NEXT BYTE
5
7 (I,B) Date/Time information
12 1 Internal
13 1 (I) Type of Data (0 = State Trace Data)
14 1 (I) Number of state channels
15 2 (I) Number of valid states captured
17 2 (I) State Trace Point
19 N
(I) Data Acquired
N ' = (Number of Valid States) M
Where : M = 0 if no state channels .
M = 4 if 27 state channels .
M = 5 if 35 state channels .
M = 6 if 43 state channels .
CRC STOPPED ACCUMULATING WITH PREVIOUS BYTE
N + 19 2 (I) CRC