Motorola R-2550 Programming Reference Manual page 24

4. Status Reporting
The &vice status reporting model as specified by IEEE 488.2 is used by the analyzer to allow complete
application program control over the analyzer. This model is always used for applications using the IEEE 488.2
interface. Portions of the model is also available to applications using the RS-232 interface.
When controlling the analyzer using the RS-232 interface, the application program must
specifically command the analyzer to use the IEEE 488.2 status reporting model through the use
of the G2 command. Although IEEE 488 interface is not available on the R-2550 analyzer, the
IEEE-488.2 status reporting model is available.
Status and error information is maintained in internal registers, as shown in the figure on the next page.
There are four Event Status Registers defined by the analyzer model, one of which is the Standard Event Status
Register specified by IEEE 488.2. The remaining three are specific to the analyzer. These registers are:
Standard Event Status Register @-bits wide}
Error Status Register (I-bit wide)
Status Event Status Register (I-bit wide)
Calibration Warning Status Register (1 -bit wide)
Per IEEE 488.2, the following queues and registers are also implemented:
Standard Event Status Enable Register (&bits wide)
Output Queue
Status Byte Register (a-bits wide)
Service Request Enable Register (&bits wide)
Programming Reference
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