Transition Filter And Condition Register - Agilent Technologies 4294A Programming Manual

Status Reporting System
General Status Register Model

Transition filter and condition register

The transition filter allows you to select which transitions of the condition of the 4294A
will set a bit in the event register.
When the status register has a transition filter, there is a lower register called a condition
register under the event register. The transition filter is between the event register and the
condition register. The transition filter enables you to select a positive and/or negative
transition of the condition register bit to set a bit in the corresponding event register. For
example, if you set the negative transition filter, a "1" is set in the event register by
changing from "1" to "0" in the condition register.
Figure B-2 Transition Filter and Condition Register
For the 4294A, only the "Program Running" and "Printing" bits of the operation status
register has a transition filter (See Figure B-3). By using the transition filter, you can
generate an SRQ at the start and/or the end of the program execution.
476 Appendix B