Acquisition Device Input
Lynx II DSA User's Manual – 7096089 135
A. Specifications
Acquisition Device Input
ENERGY
Detector/preamplifier signal input connector, BNC. Accepts positive or negative signals
from an associated detector preamplifier; amplitude for full scale conversion ±1 V divided
by selected gain; maximum input (signal +dc) for linear operation is dependent on the
Input Attenuator setting; Attenuator OFF (x1): ±4 V, Attenuator ON (x 0.25): ±12 V, dc
coupled and protected to ±12 V maximum; rise time: less than the selected Rise Time +
Flat Top settings; acceptable preamplifier decay time constant: 40 µs to infinity; Z
in
is 1k.
TRP INH
Reset-Preamp inhibit input connector, BNC. TTL compatible logic signal. Software
selectable polarity; functionality depends on the mode selected.
• NORM – Signal inhibits the signal processing and extends the dead time for the
duration of the inhibit signal.
• RESET – Signal inhibits the signal processing and extends the dead time for the
duration of the inhibit signal OR the duration of an internal inhibit timer.
HV INH
Preamp high voltage inhibit input connector, BNC. Accepts input from the detector
preamplifier to shut down the HVPS in the event of a detector warmup above its safe
operating temperature; polarity is software selectable to match the preamplifier.
• Positive polarity – For Mirion preamplifiers; Enable condition (cold detector) is an
open circuit or active high = +1.2 V to +24 V; Inhibit condition (warm detector) is –
24 V to <+1.2 V or ground.
• Negative polarity – For preamplifiers and LN monitors where an enable condition
(cold detector) is –24 V to <+1.2 V; Inhibit condition (warm detector) is open
circuit or active high = +1.2 V to +24 V. With Negative polarity selected an open
input will disable the high voltage.
Note: After the inhibit condition is removed, the high voltage remains disabled until the
user acknowledges the fault condition via a reset of the high voltage supply.
MCS
MCS input connector, BNC. TTL compatible. Minimum pulse width is 25 ns. Software
selection for MCS input must be set to TTL-input to accept pulses from the MCS
connector.
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