Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter 363
Status Reporting System
General Status Register Model
C Status Reporting System
This appendix describes the status reporting system of the Keysight E4981A.
General Status Register Model
The Keysight E4981A has a status reporting system for monitoring the
instrument’s condition.
Figure C-1 General status register model
The status reporting system has the hierarchical structure shown in Figure
C-1.When the instrument satisfies a particular condition, the corresponding bit
of the event register is set to “1.” Therefore, you can check the instrument
status by reading the event register.
When the event register bit is set to “1” and a corresponding enable register bit
(a bit marked with an arrow in Figure C-1) is also “1,” the summary bit of the
status byte register is set to “1.” You can read the status byte register by using
the serial poll.
If the bit of the service request enable register is “1,” a service request (SRQ) is
generated by the positive transition of the corresponding status byte register
bit. By generating an SRQ, you can notify the controller that the E4981A is
requesting service. In other words, you can program interruption by using an
SRQ. For more information on using SRQ, see “Waiting For Completion Of
Measurement (Detecting Completion Of Measurement)” on page 61 in
Chapter
5
or “Detecting the occurrence of an error” on page 84 in Chapter 8.
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