Agilent Technologies 8935 Series Manual do Utilizador descarregar pdf (Página 107)

Chapter 5 107

Triggering Measurements

Settling

Settling refers to the amount of delay introduced to allow signal

transients to propagate through the analysis chain and settle out.

There are two options:

1. Full settling introduces the appropriate delay for all signal

transients which might have occurred at the front panel at just the

same time as the trigger event, to pass through the analysis chain

and settle out. Delays are also inserted to allow for internal

hardware transients to settle.

2. Fast settling introduces no delay for internal or external signal

transients to settle. The programmer must account for transient

settling before issuing the Trigger Event.

NOTE

There will still be delays introduced by autoranging. If you want to

remove these delays, turn OFF autoranging and explicitly set the

ranging amplifiers in the program. Delays introduced by the

measurement processes themselves cannot be eliminated.

NOTE

Bus Lock Up:

If a measurement cycle does not successfully obtain a valid

measurement result, it will continue to try until it does or until the

measurement trigger is aborted. This is true for both retriggering

modes. This has the consequence that both the HP-IB bus and the

Active Controller handshake are in a temporary holdoff state while the

Active Controller waits to read the measurement result from the Test

Set.

The control program should include measurement time-out routines

that CLEAR the bus and ABORt the trigger if a measurement does not

complete within a specified amount of time. This provides a method of

preventing the bus from remaining in the temporary holdoff state

indefinitely.

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Agilent Technologies 8935 Series Manual do Utilizador Página 107