Keithley 2000, User Manual, Page: 137 / 280

*TRG — Trigger
Send bus trigger to 2000
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
Run self test and read result
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.
B7 B6 B5 B4 B3 B2 B1 B0
(2 ) (2 )
6
(2 )
5
(2 )
4
(2 )
3
(2 )
2
(2 )
0
32
0/1
Bit Position
Event
Decimal Weighting
Value
Value : 1 = Event Bit Set
0 = Event Bit Cleared
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
OSB ESB MAV QSB EAV
0/1 0/1 0/1 0/1
128 16 8 4
MSS,
RQS
64
0/1
MSB
1
0/1
7
Figure 4-16
Status byte regis-
ter
Remote Operation 4-51