Mirion Technologies Lynx II DSA User Manual

Lynx II Genie 2000 Acquisition Window Adjust
Lynx II DSA User's Manual – 7096089 49
Fine Gain
This adjustment sets the device’s Fine Gain multiplier. The adjustment range is x0.8000 to
x1.2000.
The combination of Coarse Gain and Fine Gain and Gain Attenuator sets the overall
system gain to match the requirements of the detector and energy application.
When making a gain adjustment, please refer to the applicable guideline under Coarse
Gain setting.
The Fine Gain cannot be adjusted when the Spectrum Stabilizer is active.
PUR Guard
Sets the device’s Guard Time (GT) multiplier to reject trailing edge pileup in the event of
detector/preamp anomalies. The PUR guard sets the pileup reject interval, which is
defined by GT x T
Risetime
+ T
Flattop
.
Offset
The Offset adjustment sets the device's digital offset in channels. The digital offset shifts
the memory assignment of the device's conversions either up or down depending on the
sign and value of the offset. A positive offset value shifts the spectrum by the amount of
the offset in the upward direction. A negative offset value shifts the spectrum by the
amount of the offset in the downward direction.
FDisc Setting
Sets the device’s Fast Discriminator threshold level (when Manual FDisc Mode is
selected). The range is 0 to 100%, where 100% corresponds to approximately 20% of the
full scale energy range.
FDisc Mode
Sets the device’s Fast Discriminator threshold mode. Auto allows the threshold to be
optimized automatically above the system noise level; Manual allows the threshold to be
manually adjusted. For normal operations, this setting should be set to Auto. Please note
that in Manual mode the FDisc threshold can be set below the noise level possibly causing
wanted data to be rejected.
LT Trim
Allows adjustment of the trapezoid pulse evolution time or dead time to optimize LTC
performance. The adjustment range is 0 to 1000; the default value of 500 provides good
LTC performance for a wide range of applications.
Refer to PUR/LTC Operation on page 166 for more information.
LTC Mode
Sets the amplifier’s Pulse Pileup Rejector and Live Time Corrector. When PUR is On, the
pileup rejector and live time corrector (LTC) are enabled. Off disables the pileup rejector
and LTC. For normal operation, this setting should be On.

Mirion Technologies Lynx II DSA Specifications

General

Brand	Mirion Technologies
Model	Lynx II DSA
Category	Measuring Instruments
Language	English