Canberra Lynx DSA, Руководство пользователя

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Chapter 5 Web-Based Operations
144 Lynx DSA User's Manual - 9240227J
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MASTER B produces an 1 MHZ clock with approximately 50% duty cycle
used to synchronize the time base clock with other Lynx during LIST/TLIST
acquisition.
EXTERNAL SYNC PULSE
Sets the rate of the external sync pulse on the SYNC output connector when
EXTERNAL SYNC MODE is set to MASTER A. Range is from 1000 to
2,147,483,648 milliseconds.
EXTERNAL SYNC POLARITY
Sets the triggering edge of the external SYNC signal when external sync is enabled
and EXTERNAL SYNC MODE set to SLAVE. POSITIVE selects the TTL-low to
high edge, NEGATICVE selects the TTL-high to low edge.
EXTERNAL SYNC TIMEOUT
Sets the timeout value in milliseconds when external sync is enabled and an external
sync pulse is expected by the Lynx, 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. 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
µ
s rise/fall time, 0.8
µ
s 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 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 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.