Agilent Technologies 8935 Series Manual do Utilizador descarregar pdf (Página 53)

Chapter 2 53

Methods For Reading Measurement Results

Background

The following programs demonstrate a recommended technique for

querying and entering data from the Test Set. This technique will

prevent the Test Set from getting into a ‘hung’ state such that power

must be cycled on the Test Set to regain manual or programmatic

control.

There are a variety of programming constructs which can be used to

implement this technique. In the programming examples presented, a

function call is implemented which returns a numeric measurement

result. The function call has two pass parameters; the query command

(passed as a quoted string) and a time-out value (passed as a integer

number).

The time-out value represents how long you want to wait, in seconds,

for the Test Set to return a valid measurement result. If a valid

measurement result is not returned by the Test Set within the time-out

value, the function returns a very large number. The calling program

can check the value and take appropriate action.

The program examples are written so as to be self-explanatory. In

practice, the length of: variable names, line labels, function names, etc.,

will be implementation dependent.

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Agilent Technologies 8935 Series Manual do Utilizador Página 53