Agilent Technologies B, 8163A, 8164A, 8166A Timing Behavior

Timing Behavior GPIB Command Compatibility List
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition 253
Timing Behavior
Table15 details the ways in which timing behavior is different.
Table15 Timing Behavior Changes
Change Affects
Command execution may be different. Both
In all mainframes and modules fir mware revisions before 3.x G PIB will
block during command execution, except when executing functions,
such as logging and sweep, that don’t t olerate 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 blo cks if a command can't be
processed becau se of a pendi ng command. While a comm and is
pending *OPC? returns 0 now. This is the behaviour of the 8153.
Both
When continuous triggering and av eraging times are greater than 1
second, the read-out values reset after th e averaging time is over; there
is no sliding behavior.
8153