Agilent Technologies E1406A, User'S Manual And Scpi Programming Manual

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Required Status
Groups
All SCPI instruments must implement a minimum set of status groups.
Some instruments contain additional status groups, consistent with the
general status register model. The minimum required status system is
shown in Figure 4-5.
The Standard Operation Status and Questionable Data Groups are 16-bits
wide, while Status Byte and Standard Event Groups are only 8-bits wide. In
all 16-bit groups, the most significant bit (bit 15) is not used. Bit 15 always
returns a zero. The commands that set and query bits in the Status Registers
all use decimal integers. For example, you send
*ESE 4
to set bit 2 of the
Standard Event Enable Register. Similarly, a response of "8" to the query
*ESE? indicates that bit 3 is set. The remainder of this chapter explains
each status group in detail.
Figure 4-5. Minimum Required Status Register System
106 Triggering and System Status Chapter 4