EXFO FLS-2200 Broadband Source - Manual (Page 43)

Broadband Source 35
7 Using Your Broadband Source
in an Automated Test
Environment
EXFO supplies commands that follow the guidelines determined by the
SCPI consortium and LabVIEW drivers for your FLS-2200 Broadband
Source. Your application can be developed using LabVIEW.
The present chapter gives you information to help you use the provided
commands and drivers to remotely control your Broadband Source.
Message Management
Each device that is physically connected to the GPIB link has its own input
buffer, output queue and error/event queue. These data structures allow
storage of incoming messages (single or compound commands that are
sent to an instrument), responses from queries, errors and events that may
occur.
Data structure Characteristics Clearing
Input buffer

Consists of a First-In, First-Out
(FIFO) data structure.

Stores Data Bytes (DABs) and END
messages.

Delivers messages to the parser in
the order that they were received
from the I/O control.

Maximum message length:
unlimited in DABs (the input
buffer size is only limited to the
total size of the device memory).
The buffer will be cleared
by:

Turning off the power.

Sending a Device Clear
(DCL) message to the
instrument.

Sending a
Selected Device Clear
(SDC) message to the
instrument.