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MPA4 / MPA4T Multi-Parameter Multi-Channel Analyzer System.

This PC-based, ultra-high-speed, multiple input-parameter multi-channel analyzer (or Multi-Parameter Analyzer, MPA) is intended to simultaneously histogram multiple digital inputs from external sources, recording those events occurring within a defined coincidence time window as a single event, on an event-by-event basis. The MPA4 system has improved coincidence resolving times from approx. 20 ns (in steps of 20ns) to more than 1.3 s for dependent single- and multi-parameter acquisitions. Alternatively, each input of the MPA System can also be operated in an independent (non-correlated) MCA mode.

Designed as an ultra fast list mode system with input ports for 4 or 8 ADC's, multiscalers or time-of-flight devices (TDC), the multiple inputs may be defined as several single- and dual-parameter spectra which can be simultaneously acquired and displayed in multiple windows. Any combination of inputs can be selected. Calculated parameters can further be defined and displayed allowing evaluation of position-dependent detector or other applications.

List data (the sequential event-by-event data) can be stored on the local hard disk device or any other directly addressable storage device. Using a SATA hard disk drive, data can be stored online at full throughput for many hours depending on the configuration. The system can accumulate and histogram single- and multi-parameter spectra in the RAM of the PC as well.

The MPA4T has been optimized for the best possible pulse pair resolving while providing state-of-the-art time resolution available in digital designs. Six built-in discriminators can be adjusted for a wide range of signal levels. The single sweep time range enables the user to take data of up to 20 days (54-bit setting) or 30 min (44 bit setting with 16 TAG bits enabled), with a time resolution of 100 ps. In endless and wrap-around mode sweep repetitions with zero end-of-sweep dead time can be accommodated.

The MPA4/MPA4T systems require a USB2.0 interface and run under either a 32 or 64-bit Windows operating system. The maximum possible transfer data rates can however only be achieved with the use of two USB2.0 ports. Linux drivers for the MPA4/MPA4T systems are anticipated to be available in the future. Each base system includes the hardware, cables and FAST ComTec operating/display software. See individual data sheets for more details and specific features.

 Multi-Parameter Analyzer (MCA) Systems, MPA4 / MPA4T Series
 Selection Guide, Base Systems
 Model  Description

MPA4 Base System, 4 parameters, 4 ADC digital interface ports installed, MPAWIN NT software. No ADC's included. Until approximately Jan 2012, this 4 parameter version will be supplied as an 8 parameter system (MPA4-8 below) with only 4 parameters enabled.


MPA4 Base System, 8 parameters. 8 ADC digital interface ports installed. MPAWIN NT software. No ADCís included.


MPA4 Base System, 4 parameters, as above but with the integration of a multi-input (1 STOP, 5 START), 100 psec multi-hit multiscaler (MCS6 equivalent functionality). No ADC's included.


MPA4 Base System, 8 parameters, as above but with the integration of a multi-input (1 STOP, 5 START), 100 psec multi-hit multiscaler (MCS6 equivalent functionality). No ADCís included.

Options, MPA4 / MPA4T System

Windows based DLL Function Library Kits enable control of the MPA4 System from external applications, including transfer of data. The programmers kit requires some programming expertise. There are no LINUX drivers for this system.

List Mode data can be displayed by the MPA-NT operation software only in the format in which it was originally recorded unless the Replay option is used. Replay option software enables manipulation and processing of List Mode data for display in various formats (e.g. selecting smaller number of bits per parameter, different parameters, arithmetic operations, etc) that may be different from the format displayed during the original acquisition.

 Model  Description
  MPA4/2 GB

Adds additional 1 GB FIFO memory to standard 1 GB MPA4 memory for total of 2 GB. Recommended.


Counter/Scaler, 8 input, 100 MHz max count rate, 32 bit counting range per input.
D-Sub input connector (see C1 Cable below for BNC connectors).


Up/Down Counter. Adds up/down capability to MPA-4/CTR option above, for 2 inputs. MPA-4/CTR item required.


Fan-Out Cable for MPA-4/CTR option, 37 pin D-Sub to BNC fan out cable


Replay Software. Enables reading and re-display of MPA4 LIST data files, in user-defined format different than originally written to disk (i.e. different number of data bits on selected parameters, different selected parameters, calculation on data). Also includes software spectrum stabilizer feature.


Replay Software, External. Same as above but for offline data analysis use on separate PC, or on main host PC.  Uses key module installed on USB port


Labview/Visual Basic DLL Software Development Kit (Dynamic Library Link).  To enable control of MPA4 program from Labview or Visual Basic/C software.  Requires some user software programming capability.


LINUX drivers for MPA4

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