HP 8168E - Page 98

5
Example OUTPUT 724;":WAVE:REF:STAT OFF"
OUTPUT 724;":WAVE 1542E-9"
OUTPUT 724;":WAVE?"
ENTER 724;A$
[:SOURce]:WAVElength:REFerence?
Syntax [ :SOURce ] :WAVElength:REFerence?
Description The query returns the reference wavelength ( 
0
) in meters.
Example OUTPUT 724;":WAVE:REF?"
ENTER 724;A$
[:SOURce]:WAVElength:REFerence:DISPlay
Syntax [ :SOURce ] :WAVElength:REFerence:DISPlay
Description This command sets the reference wavelength to the value of the
output wavelength (  ! 
0
).
Example OUTPUT 724;":WAVE:REF:DISP"
[:SOURce]:WAVElength:FREQuency
Syntax [ :SOURce ] :WAVElength:FREQuency < wsp >< value >
Description This command sets the frequency dierence used to calculate
a relative wavelength. The output wavelength is made up
of the reference wavelength and this frequency dierence.
The default units for the frequency are Hertz. The output
wavelength (  ) is set from the base wavelength ( 
0
) and the
frequency oset (df). The formula for calculating the output
wavelength is:
 =
c
( 
0
) df + c

0
where c is the speed of light in a vacuum (2.998 2 10
8
ms
-1
).
[:SOURce]:WAVElength:FREQuency?
Syntax [ :SOURce ] :WAVElength:FREQuency?
5-28 Remote Commands