Keysight Technologies EPM-P Series Programming Manual page 104

1 Power Meter Remote Operation
The status byte summary register
The status byte summary register reports conditions from other status registers.
Query data waiting in the power meter's output buffer is immediately reported
through the "message available" bit (bit 4). Clearing an event register clears the
corresponding bits in the status byte summary register. Reading all messages in
the output buffer, including any pending queries, clears the message available bit.
Table 1-3
Bit number
0
1
2
3
4
5
6
7
Particular bits in the status byte register are cleared when:
– The standard event, Questionable status, operation status and device status
– The error/event queue becomes empty.
– The output queue becomes empty.
104
Bit definitions - status byte register
Decimal weight
1
2
4
8
16
32
64
128
are queried.
Definition
Not Used (Always set to 0)
Device Status Register summary bit.
One or more bits are set in the Device Status Register (bits must be
"enabled" in enable register)
Error/Event Queue
Questionable Status Register summary bit.
One or more bits are set in the Questionable Status Register (bits
must be "enabled" in enable register).
Data Available
Data is available in the power meter's output buffer.
Standard Event
One or more bits are set in the Standard Event register (bits must be
"enabled" in enable register).
Request Service
The power meter is requesting service (serial poll).
Operation Status Register summary bit.
One or more bits are set in the Operation Status Register (bits must
be "enabled" in enable register).
Keysight EPM-P Series Programming Guide