A. Specifications
Acquisition Device Inputs
ENERGY IN – Detector/preamplifier signal input connector; BNC, ±0.5 V input
range, ±4 V max. input DC offset, software selectable polarity, x4 input attenuator to
be implemented to allow wider input range.
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 in-
hibit timer. Inhibit time is the longer of these two inhibit sources.
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 warm-up; po-
larity is software selectable to match the preamplifier.
Positive polarity:
(For Canberra preamplifiers); Enable condition (cold de-
tector) 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 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 inhibit is removed, the high voltage remains disabled until the
user acknowledges the fault condition via a reset of the high voltage
supply. See the HVPS On command, discussed on page 92.
MCS IN – MCS input connector; BNC. TTL compatible. Maximum input rate >50
MHz. Minimum pulse width >20 ns.
User’s Manual 145
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