Programming Guide – 72
:INPut:LCMode
Syntax
:INPut:LCMode <space> <boolean>
Function
Sets the process by which the wavelength calibration is implemented when the
wavelength is changed.
A boolean value of 1 or ON activates LCM mode. In LCM mode, the total
attenuation remains fixed when the wavelength is changed, for example, the
attenuator prism is moved to give the same attenuation at the new wavelength.
A boolean value of 0 or OFF deactivates LCM mode. When LCM mode is turned
off, the actual attenuation changes (as well as the total attenuation) when the
wavelength is changed, for example, the attenuator prism does not move when
the wavelength is changed.
Example
:INP:WAV 1300 NM;ATT 10;LCMode ON;WAV 1550 NM sets the total
attenuation to 10 dB, and the total attenuation remains at 10 dB when the
wavelength is changed from 1300 nm to 1550 nm.
:INP:WAV 1550 NM;ATT 10;LCMode OFF;WAV 1300 NM sets the total
attenuation to 10 dB, but the total attenuation changes slightly when the
wavelength is changed from 1550 nm to 1300 nm.
:INPut:LCMode?
Syntax
:INPut:LCMode?
Function
Returns the current state of LCM mode, for example, returns 1 if LCM mode is
ON and 0 if LCM mode is OFF.
Example
:INP:LCM ON;LCM? returns 1.
:INPut:OFFSet
Syntax
:INPut:OFFSet <space> <numeric value> [<suffix>]
Function
Sets the display offset of the attenuator. The value of the offset has no effect on
the actual attenuation, but it does affect the total attenuation, for example,
Att
total
= Att
actual
+ Offset
This command also accepts the parameters MIN, MAX, and DEF. The minimum
offset is -29.99 dB, the maximum offset is 29.99 dB, and the default offset is 0.
Example
:INP:OFFS 10 sets the offset to 10 dB. If the actual attenuation is 14 dB, the
total attenuation is 24 dB.
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