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command:
[:SOURce[n]][:CHANnel[n]]:WAVelength:FREQuency
syntax:
[:SOURce[n]][:CHANnel[n]]:WAVelength:FREQuency<wsp>
<value>[THZ|GHZ|MHZ|KHZ|HZ]
description:
Sets the frequency difference used to calculate a relative wavelength. The
output wavelength is made up of the reference wavelength and this fre-
quency difference.
The default units for frequency are Hertz.
The output wavelength (λ) is set from the base wavelength (λ
quency offset (df). The formula for calculating the output wavelength is:
where c is the speed of light in a vacuum (2.990 x 10
parameters:
The frequency difference is a float value in Hz.
response:
none
example:
sour2:wav:freq -10THZ
affects:
All Tunable Laser modules
command:
[:SOURce[n]][:CHANnel[n]]:WAVelength:FREQuency?
syntax:
[:SOURce[n]][:CHANnel[n]]:WAVelength:FREQuency?
description:
Returns the frequency difference used to calculate a relative wavelength.
where c is the speed of light in a vacuum (2.990 x 10
parameters:
none
response:
Returns the frequency difference as a float value in Hz.
example:
wav:freq?
affects:
All Tunable Laser modules
Introduction to Programming
Signal Generation – The SOURce Subsystem
λ
=
→
-1.00000000E+013<END>
112
c ( )
----------------------------- - λ
(
(
λ
)
)
o
df
+
c
o
) and the fre-
0
8
-1
ms
)
8
-1
ms
)
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