Table 1-5 Bit Definitions - Status Byte Register - Agilent Technologies N1911A Programming Manual

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 1-5 Bit Definitions - Status Byte Register

Particular bits in the status byte register are cleared when:
• The standard event, Questionable status, operation status and device
• The error/event queue becomes empty.
• The output queue becomes empty.
N1911A/1912A P-Series Power Meters Programming Guide
Bit Number Decimal
Weight
0 1
1 2
2 4
3 8
4 16
5 32
6 64
7 128
status are queried.
Power Meter Remote Operation
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).
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