Exfo FVA-3150 Variable Attenuator Manuel d'utilisateur télécharger pdf (Page 89)

Remote Control Commands

Variable Attenuator 83

Specific commands-Quick Reference Command Tree

ATTenuation?

Description This query returns a value corresponding to the CAL parameter

value added to either the current attenuation setting, the

minimum attenuation, or the maximum attenuation setting.

Syntax ATT? [<wsp><value>]

Parameters The <value> parameter is optional and can be

“MIN” to obtain the minimum setting for the current wavelength

“MAX” to obtain the maximum setting for the current

wavelength

Response The attenuation value in the format “99.999”. The units are dB.

Note that, depending on the current measurement mode, the

response will include different parameters:

In Absolute mode:

In Reference mode:

In Offset mode:

Example ATT? MIN

Note The ATT? command is not equivalent to the INP:ATT?

command.

response actual attenuator general offset (CAL?)+=

response

actual

attenuation

reference value

INP:OFFS?

general offset

(CAL?)

+–=

response

actual

attenuation

wavelength-specific

offset

general offset++=

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 114 115

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Exfo FVA-3150 Variable Attenuator Manuel d'utilisateur Page 89