10-35
IM 755601-01E
Communication
Commands
10
*SRE (Service Request Enable register)
Function
Sets the service request enable register or
queries the current setting.
Syntax
*SRE {<NRf>}
*SRE?
<NRf> = 0 to 255
Example
*SRE 239
*SRE?
→
175 (Because the setting for bit
6 (MSS) is ignored)
Description • <NRf> is the sum of the bits expressed as a
decimal number.
• In the above example, the service request
enable register is set to”11101111.” In other
words, bit 4 of the service request enable
register is disabled so that bit 6 (MSS) of the
status byte register is not set to “1” even
when the output queue is not empty.
• However, bit 6 (MSS) of the status byte
register is the MSS bit, and is therefore
ignored.
• The default value is “
*SRE 0
” (all bits
disabled).
• A “
*SRE?
” query will not clear the service
request enable register.
• For details regarding the service request
enable register, see pages 10-36 and 10-37.
*STB? (STatus Byte)
Function
Queries the status byte register.
Syntax
*STB?
Example
*STB
→
4
Description • The sum of the bits is returned as a decimal
value.
• Because the register is read without serial
polling, bit 6 is the MSS bit, not RQS.
• In the above example, the returned value of
“4” indicates that the status byte register is
set to “00000100.” In other words, “the error
queue is not empty” (an error occurred).
• A “
*STB?
” query will not clear the status byte
register.
• For details regarding the status byte register
see page 10-37.
*TRG (TRiGger)
Function
Executes a manual trigger and makes one
measurement.
Syntax
*TRG
Example
*TRG
Description • This command is valid only when the
“
:TRIGger:MODE
” is set to MANual.
• The interface message GET (Group Execute
Trigger) also achieves the same operation.
• For details regarding measurements using
the “
*TRG
” command, see page 10-12.
*TST? (TeST)
Function
Performs a self test and queries the result.
Syntax
*TST?
Example
*TST?
→
0
Description • Performs an internal self-test, and returns the
sum of the error codes as a test result. If no
errors occur, a “0” is returned. This self-test is
the same test that is performed at power-up.
Test Item
Error Code
• Check the minimum voltage level
1
of the backup battery
• Check the checksum of the
2
backup RAM (Settings other
than those related to
communications)
• Check the checksum of the
4
backup RAM
(Communication settings)
• Check the checksum of the
8
backup RAM (SETUP file)
• Calibration data(EEPROM)
16
*WAI (WAIt)
Function
Holds the subsequent command until the
completion of the specified overlap operation.
Syntax
*WAI
Example
*WAI
Description • For the procedures regarding the use of the
“
*WAI
” command for synchronization, see
page 10-7.
• An overlap command is specified using the
“
:COMMunicate:OPSE
” command.
10.2 Commands
