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Service Request Enable Register
The Service Request Enable Register provides a mask for the event bits in the Status Byte Register. Each bit is
given a decimal weighting according to its position in the register.
The Service Request Enable Register can be modified using the command *SRE. The register can be read by
using the query *SRE?. The register is not read destructively, i.e., its contents are unchanged when read. The
register is cleared by the command *CLS.
Each bit of the register is logically "anded" with the corresponding bit of the Status Byte Register. The resulting
eight bits are then logically "ored" together to form the Master Status (MSS) message of the Status Byte Register.
The MSS can be set if either of the following conditions are satisfied by any of the event bits: (1) a bit mask of 1
is defined for an event and then that event transitions from 0 to a 1 or (2) the event bit is already a 1 and its
corresponding mask bit is set from a 0 to a 1.
of
Bit 6
the Status Byte Register (MST) is not included in the above operation. Bit 6 of the
Service Request Enable Register can never be set.
Weight
Service Request Enable Register
128
not used
64
not used (always 0)
32
ESB - Event Status Bit Mask
16
MAV - Message Available Bit Mask
8
EAV - Error Message Available Bit Mask
4
SAV - Status Message Available Bit Mask
2
CAL - Recalibration Warning Bit Mask
1
not used
21
Note
Motorola Communications Analyzer
Programming Reference
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