Exfo FLS-2200 Broadband Source Manual de usuario descargar pdf (Pagina 46)

Using Your Broadband Source in an Automated Test Environment

38 FLS-2200

Message Management

Error/Event

queue

 Consists of a First-In, First-Out

(FIFO) data structure.

 Total storage capacity: 50 errors or

events.

 Errors or events can be retrieved,

one at a time, with

:SYSTem:ERRor[:NEXT]?.

 When an error or event occurs

and the Error/Event queue is full,

the last item in the queue (the

most recent) is removed and the

Queue overflow error

(error –350) is added. No new

items will be stored into the queue

until there will be room available.

 As soon as there is data in the

output queue, the Error AVailable

bit (bit number 2 –EAV from the

Status Byte register) is set to 1.

The Error/Event queue will

be cleared when:

 Reading all the items it

contains.

 Turning off the power.

 Sending a Device Clear

(DCL) message to the

instrument.

 Sending a

Selected Device Clear

(SDC) message to the

instrument.

 Using the *CLS

command.

Data structure Characteristics Clearing

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Exfo FLS-2200 Broadband Source Manual de usuario Pagina 46