Chroma 6404 - Page 49

Remote Operation
6-13
Query Example: *SRE? returns the content of SRE.
*STB?, Read Status Byte Query
Description: This query returns the Status Byte register (STB). The status byte can be read
with either a serial poll or the *STB? Common query. If it is read with a serial
poll, the RQS bit is sent for the bit 6 position and then cleared. If it is read with
*STB?, MSS bit is sent but not cleared.
Bit configuration of Status Byte Register
Bit Position
7
6
5
4
3
2
1
0
Condition
OPE
R
MSS
ES
B
MAV
QUE
S
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---
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RQS
Bit Weight
128
64
32
16
8
Remark: RQS : Request service bit MSS : Master status summary bit
ESB : Event status summary bit MAV : Message available summary bit
QUES : Questionable status summary bit OPER: Operation status summary bit
Query Syntax: *STB?
Parameters: None
Return Parameters: <NR1>
Query Example: *STB? returns the content of STB.
*TST?, Self-Test Query
Description: This query causes an internal self-test and reports result. If the ac source
completes the self-test without any detected errors will return a 0, otherwise it
will return a 1. Note that during self-test caused by *TST, the output voltage
will reach 300V. Please disconnect any output load.
Query Syntax: *TST?
Parameters: None
Return Parameters: 0 | 1
Query Example: *TST? causes a self-test and reports result.
*WAI, Wait-to-continue
Description: This command prevents the ac source from executing any further command
until all pending operations are completed.
Syntax: *WAI
Parameters: None