PIXIE-4 User’s Manual
V2.69
©
XIA
2015. All rights reserved.
iv
1.2 Specifications
Front Panel I/O
Signal Input (4x)
4 analog inputs. Selectable input impedance: 50Ω and 5kΩ, ±5V pulsed,
±2V DC. Selectable input attenuation 1:7.5 and 1:1 for 50Ω setting.
Logic Input/Output
General Purpose I/O connected to programmable logic (Rev. C, D only).
Currently can be either used as input for global backplane signals Veto or
Status, as an input for module specific logic level reported in the data
stream, or as an external trigger.
Logic Output
General Purpose output from Digital Signal Processor. Function to be
determined.
Backplane I/O
Clock Input/Output
Distributed 37.5 MHz clock on PXI backplane.
Triggers
Two wired-or trigger buses on PXI backplane. One for synchronous
waveform acquisition, one for event triggers.
Status
Global logic level from backplane reported for each event
Token
Global logic level from backplane used for coincidence tests
Synch
Wired-or SYNC signal distributed through PXI backplane to synchronize
timers and run start/stop to 50ns.
Veto
Global logic level to suppress event triggering.
Channel Gate
Individual GATE to suppress event triggering for each channel with use of
PXI-PDM (Rev. D only)
Data Interface
PCI
32-bit, 33MHz Read/Write, memory readout rate to host
over 100 Mbytes/s.
Digital Controls
Gain
Analog switched gain from 0.97 to 11.25 in max. 10% steps.
Digital gain adjustment of up to ±10% in 15ppm steps.
Offset
DC offset adjustment from –2.5V to +2.5V, in 65535 steps.
Shaping
Digital trapezoidal filter. Rise time and flat top set independently: 53ns –
109μs in small steps.
Trigger
Digital trapezoidal trigger filter with adjustable threshold. Rise time and
flat top set independently from 26ns to 853ns.
Data Outputs
Spectrum
1024-32768 channels, 32 bit deep (4.2 billion counts/bin).
Additional memory for sum spectrum for clover detectors.
Statistics
Real time, live time, filter and gate dead time, input and throughput
counts.
Event data
Pulse height (energy), timestamps, pulse shape analysis results,
waveform data and ancillary data like hit patterns.