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1
Introduction to Programming
Common Status Information
16
There are three registers for the status information. Two of these are
status-registers and one is an enable-registers. These registers conform to
the IEEE Standard 488.2-1987. You can find further descriptions of these
registers under *ESE, *ESR?, and *STB?.
Figure 1
shows how the Standard Event Status Enable Mask (SESEM) and
the Standard Event Status Register (SESR) determine the Event Status Bit
(ESB) of the Status Byte.
*STB? returns the Status Byte Register
OSB ESB
MAV
7
6
5
4
Status
0
1
0
Byte
All bits shown as
Figure 1
The SESR contains the information about events that are not slot specific.
The SESEM allows you to choose the event that may affect the ESB of the
Status Byte. If you set a bit of the SESEM to zero, the corresponding event
cannot affect the ESB. The default is for all the bits of the SESEM to be set
to 0.
*ESE sets the Standard Event Status Enable Mask
Event
Status
Enable
Mask
QSB
3
2
1
0
0
are unused
Event
Status
Register
*ESR? returns the Standard Event Status Register
The Event Status Bit
Keysight N774xC Series Multiport Power Meter Programming Guide
7
6
5
4
3
2
1
1
1
1
1
&
&
&
&
&
&
7
6
5
4
3
2
0
0
0
0
0
1
0
1
&
&
1
0
1
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