How To Use Registers - Keysight Technologies EPM-P Series Programming Manual

1 Power Meter Remote Operation
Case A
Case B
Case C
Case D
Figure 1-10

How to use registers

There are two methods you can use to access the information in status groups:
– the polling method, or
– the service request (SRQ) method.
Use the polling method when:
– your language/development environment does not support SRQ interrupts.
– you want to write a simple, single purpose program and do not want to add the
Use the SRQ method when you:
– need time critical notification of changes.
– are monitoring more than one device which supports SRQ interrupts.
– need to have the controller do something else while it's waiting.
– cannot afford the performance penalty inherent to polling.
98
0
0 0 0 0
0
0 1 1
1 0 1 0 0 0
1 1 0 0 0 0
1
Condition
0
*
Typical status register bit changes
complexity of setting an SRQ handler.
0 0
0 1
0 0 0 0
1
1 1 1
1 1 0
T1 T2 *
*
marks when event register is read
Keysight EPM-P Series Programming Guide
0 0
1 0 0 0
1 0 0
0 1 1
1 0 0 0 0 0
0
1 0
0 1 0
T3 T4
0 0 0
0 0 0
0 0 0
0 0 0
*
T5