8230 Optical Power Meter Operation Manual
4.5 Status Register
4-9
Conditions which clear the status byte register
• When the power is turned on.
• When “*CLS” is executed. However, MAV is not cleared if data exists in the output buffer.
• When all bits of DSB, MAV, and ESB are cleared.
• The status byte register is not cleared by executing “*STB?”.
*1: DESR Device event status register
DESER Device event status enable register
SESR Standard event status register
SESER Standard event status enable register
STB Status byte register
Table 4-1 Status Byte Register
bit Name Description
0 Not used Fixed to 0
1 Not used Fixed to 0
2 Not used Fixed to 0
3DSB
Device Event Status
ON: Sets to 1 if one of the bit of the logical product of DESR and
DESER is 1.
OFF: Sets to 0 when DESR is cleared by “DSR?”. *1
4MAV
Message Available
ON: Sets to 1 when the output data is entered in the output buffer.
OFF: Sets to 0 when the data is output from the output buffer.
5ESB
Standard Event Status
ON: Sets to 1 if one of the bit of the logical product of SESR and
SESER is 1.
OFF: Sets to 0 when SESR is cleared by “*ESR?”. *1
6MSS
Master Summary
ON: Sets to 1 if the SRER bit, which corresponds to STB, is set to 1
when an STB event occurs.*1
7 Not used Fixed to 0
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