8163A/B, 8164A/B & 8166A/B Mainframes Programming Guide
287
GPIB Command Compatibility List
8
Timing Behavior
on page -283 details the ways in which timing behavior is
different.
Table 15
Timing Behavior Changes
Change
Affects
Command execution may be different.
Both
In all mainframes and modules firmware revisions before 3.x GPIB will block during command
execution, except when executing functions, such as logging and sweep, that don’t tolerate
blocking. This is identical to the behavior of the 8167/8. A side effect of this is that *OPC?
always returns 1.
In later firmware revisions GPIB only blocks if a command can't be processed because of a
pending command. While a command is pending *OPC? returns 0 now. This is the behaviour of
the 8153.
Both
When continuous triggering and averaging times are greater than 1 second, the read-out values
reset after the averaging time is over; there is no sliding behavior.
8153
