Keithley 2000 User Manual page 137

Figure 4-16
Status byte regis-
ter
*TRG — Trigger
Description
Use the *TRG command to issue a GPIB trigger to the Model 2000. It has the same effect as
a group execute trigger (GET).
Use the *TRG command as an event to control operation. The Model 2000 reacts to this trig-
ger if BUS is the programmed control source. The control source is programmed from the TRIG-
ger subsystem (see Section 5).
*TST?-Self-Test Query
Description
Use this query command to perform a checksum test on ROM. The command places the cod-
ed result (0 or 1) in the Output Queue. When the Model 2000 is addressed to talk, the coded re-
sult is sent from the Output Queue to the computer.
A returned value of zero (0) indicates that the test passed, and a value of one (1) indicates that
the test has failed.
Bit Position B7 B6
MSS,
Event
OSB
RQS
128 64
Decimal Weighting
7
(2 ) (2 )
Value
0/1 0/1
Value : 1 = Event Bit Set
0 = Event Bit Cleared
Send bus trigger to 2000
Run self test and read result
B5 B4 B3 B2
ESB MAV QSB EAV
32 16 8 4
6 5 4 3 2
(2 ) (2 ) (2 ) (2 )
0/1 0/1 0/1 0/1
Events : OSB = Operation Summary Bit
MSS = Master Summary Status
RQS = Request Service
ESB = Event Summary Bit
MAV = Message Available
QSB = Questionable Summary Bit
EAV = Error Available
MSB = Measurement Summary Bit
Remote Operation 4-51
B1 B0
MSB
1
0
(2 )
0/1