Agilent Technologies 8935 Series Manual do Utilizador descarregar pdf (Página 143)

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101

Chapter 6 143

Advanced Operations

Status Reporting

Output Queue Group

The Output Queue Group is a specific implementation of the status

queue model described in “Status Queue Model” on page 130. The

Output Queue queue type is defined by the IEEE 488.2-1987 Standard

to be a first in, first out (FIFO) queue. The Output Queue Group

includes a FIFO queue and a Message Available (MAV) Summary

Message. Refer to the “Status Reporting Structure Overview” on page

121 for an overview of status queue operation. Figure 6-8 shows the

structure of the Output Queue Group.

Figure 6-8 Output Queue Group

Last Data Byte Entered

Next Data Byte Entered

First Data Byte Entered

Last Data Byte

to be Read

First Data Byte

to be Read

Message Available ( MAV )

(to bit 4 of Status Byte Register)

Queue Empty = "0"

Queue Not - Empty = "1"

Output Queue

1 2 ... 138 139 140 141 142 143 144 145 146 147 148 ... 328 329

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