Keithley S46, Instruction Manual

Page: 37 / 63

Document number: S46-901-01 Rev. F / March 2011 3-13
S46/S46T/S46L Microwave Switch System Instruction Manual Section 3: Operation
Figure 3-10
Status model structure
Event register sets
An event register set is made up of an event register and an event enable register ( Figure 3-11 ).
When an event occurs, the appropriate event register bit sets to 1. The bit remains latched (to 1)
until the register is reset. When an event register bit is set and its corresponding enable bit is set
(as programmed by the user), the output (summary) of the register will set to 1, which in turn sets
the summary bit of the Status Byte Register.
0
&
&
&
&
&
&
&
&
&
&
&
&
&
&
&
&
&
&
&
&
&
&
&
Output Queue
Error Queue
S tatus Byte
Register
S ervice Request
Enable Register
1
EAV
MAV
3
E S B
RQ S /M SS
7
* S TB?
0
1
EAV
MAV
3
E S B
6
7
* S RE
* S RE?
Master S ummary S tatus (M SS )
Logical
OR
Logical
OR
Event
Register
Event Enable
Register
Standard Event Registers
*E S R?
*E S E <NRf>
*E S E?
OPC
1
QYE
DDE
EXE
CME
6
PON
8
9
10
11
12
13
14
15
OPC
1
QYE
DDE
EXE
CME
6
PON
8
9
10
11
12
13
14
15
Operation Complete
Query Error
Device S pecific Error
Execution Error
Command Error
Power On
(Always Zero)
EAV = Error Available
MAV = Message Available
E S B = Event S ummary Bit
RQ S /M SS = Request for S ervice/Master
S ummary S tatus
Note: RQ S bit is in serial poll byte,
M SS bit is in * S TB? response.