User manual

Code: ENIGMA III User Manual
Edition: 1 Revision: 4
Date: 19/12/2008
Page: 50/97
Default: 70
Unit: percent
6.5.3 PowerDiffH/PowerDiffV
Set the power difference between low and high channel in dB for horizontal and vertical channel.
Type: float
Default: 0
Unit: dB
Calibration procedure, see below.
3) The phase difference between the low and the high channel (coupler + cable)
6.5.4 PhaseDiffH/PhaseDiffV
Set the phase difference between low and high channel in degree for horizontal and vertical channel.
Type: float
Default: 0
Unit: degree
6.5.5 Extended dynamic range calibration
The procedure is quite simple. ENIGMA measures the phase and power differences continuously. In
order to calibrate please inject a CW signal into the IFD input that provides a power level in such a way
that both converters are good power level (but not saturating). 0dBm is a good value if you have a 19dB
coupler . Then you can issue the command getadcdiff.
Remark: The getadcdiff command only works if acquisition is running! There is no
need to call stopacq.
Example:
getadcdiff
getadcdiff errormsg=null phaseDiffH=12.56 phaseDiffV=0 powerDiffH=20.3
powerDiffV=0
GAMIC Proprietary