On enables gain stabilization, allowing the stabilizer to compare the incoming data to
the gain centroid and window settings, then compensate for data below (or above) the
centroid.
Hold disables gain stabilization, but maintains the current correction adjustment at the
stabilizer’s output.
Preamp Type
Selects the preamplifier type as either TRP (Transistor Reset Preamp) or RC (RC cou-
pled preamp type). RC enables the pole zero setting adjustment in the
MCA | Ad-
just | Amp
screen; TRP disables pole zero adjustment.
PUR/LTC Mode
Sets the amplifier’s Pulse Pileup Rejector and Live Time Corrector (LTC). When PUR
is on, the pileup rejector and LTC are enabled. Off disables the pileup rejector and
LTC. LFC enables the pileup rejector and LFC interface; LTC is disabled.
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 TRiTFlattop.
Inhibit Mode (TRP Inhibit)
Selects inhibit mode. NORMAL instructs the device to gate off while the INHIBIT is
true. In RESET mode, the inhibit time is automatically extended to account for the
system overload recovery time or while external INHIBIT is set true.
Auto BDC
Initiates the automatic BDC process (optimizing of the trapezoidal flat top parameters
to match the collection time of the detector) at the device. The Auto P/Z and Auto
BDC processes cannot be performed simultaneously.
Auto P/Z (9660A only)
Available only for the 9660A with the automatic pole/zero option installed.
Initiates the automatic pole/zero (P/Z) process at this device. Note that you cannot per-
form an Auto P/Z on a TRP type preamp. The Auto P/Z and Auto BDC processes can-
not be performed simultaneously.
Chapter 4 - Genie VMS User Interface and Controls
26
Model 9660-9660A ICB Digital Signal Processor