Solartron Mobrey 3595 4C, User Manual

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IMP Commands 3595 4C User Manual Part Two
1-24
35952350 (CH01/AA)
SCAN SYNCHRONISATION OF THE 1H AND 1J IMP types
To make it possible for scans to be synchronised, the 1H and 1J IMP types are able to delay the start of a
scan from the trigger. This is so that, in each IMP, the scan begins at a pre-defined subdivision boundary of
a second, minute or hour. Each IMP clock is synchronised to that of the PC. Therefore, all scans will start
at the same point in time. The time subdivision used for scan synchronisation equals the scan period,
where this is an integral sub-multiple of 100ms (1s), 60000ms (1m) or 3600000 (1h).
The algorithm that each 1H and 1J IMP uses for scan synchronisation operates as shown in Figure 1.2.
TRIGGER
Is
SP<1000 ?
Is
SP<600000 ?
Is
SP<3600000 ?
Is
1000
÷
SP and
integer ?
Is
60000
÷
SP and
integer ?
Is
3600000
÷
SP and
integer ?
Start Scan Now
Delay scan start to next
subdivision boundary
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
YES
YES
Figure 1.2: Scan synchronisation of 1H and 1J IMP types