Agilent Technologies 54645A Manual de instrucciones descargar pdf (Pagina 84)

Output Queue

The output queue stores the oscilloscope-to-controller responses that are

generated by certain instrument commands and queries. The output queue

generates the Message Available summary bit when the output queue

contains one or more bytes. This summary bit sets the MAV bit (bit 4) in the

Status Byte Register.

The output queue may be read with the HP Basic ENTER statement.

Message Queue

The message queue contains the text of the last message written to the

advisory line on the screen of the oscilloscope. The length of the

oscilloscope’s message queue is 1. The queue is read with the SYSTEM:DSP?

query. Note that messages sent with the SYSTem:DSP command do not set

the MSG status bit in the Status Byte Register.

Key Queue

The key queue contains the key codes for the last 10 keys pressed on the

front panel. This queue is first in, first out. If the key queue overflows, the

oldest key codes are discarded as additional keys are pressed. The key queue

is read with the SYSTEM:KEY? query.

Clearing Registers and Queues

The *CLS common command clears all event registers and all queues except

the output queue. If *CLS is sent immediately following a program message

terminator, the output queue is also cleared.

Status Reporting

Output Queue

6-19

1 2 ... 79 80 81 82 83 84 85 86 87 88 89 ... 110 111

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Agilent Technologies 54645A Manual de instrucciones Pagina 84