Appendix A Specifications
148 Lynx II DSA User's Manual - 7096089
EXTERNAL SYNC TIMEOUT
Sets the timeout value in milliseconds when external sync is enabled and an external sync
pulse is expected by the Lynx II, provided that acquisition has been armed. If no pulse is
received for the selected timeout then a fault condition will be asserted by the Lynx II.
Range is from 2000 to 2,147,483,648 milliseconds.
Performance
Signal Processing
SPECTRUM BROADENING
The FWHM of
60
Co 1.33 MeV gamma peak for an incoming count rate of 2 kcps to 100
kcps will typically change less than 6% for 2.8 µs rise/fall time, 0.8 µs flat top, and proper
P/Z matching. These results may not be reproducible if the associated detector exhibits an
inordinate amount of long rise time signals.
INTEGRAL NONLINEARITY
<±0.025% of full scale over the top 99% of the selected range.
DIFFERENTIAL NONLINEARITY
<±1% over the top 99% of the range including the effects from integral nonlinearity.
GAIN DRIFT
<35 ppm/°C after 15 minutes of operation.
ZERO DRIFT
<3 ppm/°C after 15 minutes of operation. Typically, less than 1 channel over the full
temperature range (8K Spectrum).
OVERLOAD RECOVERY
Recovers to within 1% of full-scale output from x1000 overload in 2.5 non overlapped
pulse widths at full gain, at any shaping (processing time), and with pole/zero properly set.
Pileup Rejection/Live Time Correction
PULSE PAIR RESOLUTION
Better than 500 ns with NORM Detector Type selected.
DEAD TIME CORRECTION
Extended live time correction, accuracy of the reference peak area changes 5% (3%
typical) at up to 50% system dead time with a setting of 5.6 µs rise time and 0.8 µs flat
top.
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