ITECHINSTRUMENTS

quadADCThe quadADC is an Embedded
Linux based high performance
ADC and multi-channel analyzer.
It connects to the 0-10 V unipolar signal coming from the main
amplifier, analyzes the signal usinga 1 µs sliding-scale ADC and storesthe events in a pulse-height spectrum with up to 65536 channels.
The quadADC connects to the PC
using Ethernet (TCP/IP) and USB.
Due to the TCP/IP protocol used
the quadADC can be connected
locally but also over the Intranet
or Internet allowing an arbitrary
distance between PC and detector.
The quadADC also features external start/stop inputs, several sample
changer inputs and outputs (TTL),
USB-Host and RS-232 interfaces
for external instruments control andsupports several trigger signals.
The quadADC not only offers
PHA acquisition but also list andmulti spectrum scaling modes. In
list mode, the data includes a timestamp (0.5 µs timer resolution)
which can be used to detect coincidences between several detectors when analyzing the data.
The list-mode based architecture also makes it possible toacquire spectra for gate/PUR
anticoincence and gate/PUR
coincidence simultaneously.

ITECHINSTRUMENTS

Housing► 2U wide NIM module, 221.3 x 68.7 mm► Power supply over NIM rack

Front panel connectors andLED’s for each input► USB host connector (USB-A) useable for HVcontrol, amplifier control or for special applications. (e.g. spectrum storage on an USB stick)► Standard NIM power connectorAcquisition modes► Signal input (0-10 V, positive)► Busy input for dead time correction (3.3 V TTL, 5 V tolerant)► Gate / Pile-up rejector input (3.3 V TTL, 5 V tolerant)► Green LED indicating correct functioning► Yellow LED blinking shortly for each event detected► Red LED indicating a running acquisition► Common for all inputs

PC Connection► USB client (USB-B) and Ethernet (RJ45) interface

Back panel D-SUB37 connector containing► 4 Trigger inputs (status changes of these inputs will be inserted into the data stream)► 4 secondary gate inputs► 8 Sample changer outputs► 8 Sample changer inputs► Serial interface (RS-232) for debugging purposes► Additional serial interface reservedfor special applications► PHA acquisition, external start/stop available, spectrum size 256-65536 channels software selectable► List mode: The raw channel data will bestored. Each event will have the real time associated. The timer resolution is 0.5 µs.
► Multi-spectrum-scaling mode: This mode is
implemented based on the list mode and theWin­nerScan software. The events are sorted indifferent time slices after some external start event.
The durations of the time slices are multiples of0.5µs, the number of time slices is practicallyunlimited. This mode is useful in decay studies.

Conversion time
► 1 µsMaximum data rate

► > 100000 counts/sec per inputs► > 250000 counts/sec cumulated

Software compatibility► Compatible with InterWinner► Example programs and drivers available for Windows and LinuxPower consumption► 1000 mA at +6 V
► 200 mA at –12 V

ITECH INSTRUMENTS

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