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N1081B

New

NIM Four-Fold Programmable Logic Unit

Features

  • Double-width NIM unit
  • Wide range of user-selectable functionalities: logic functions, counting, timing, digital pulse generator.
  • 4 independent sections, each with:
    • 6 NIM/TTL/ANALOG input
    • 4 NIM/TTL output
  • Input stage with Gate&Delay and Leading Edge Discriminator for analog input signals
  • Output stage with Monostable capability
  • 2.8” touch screen display with user-friendly widgets to configure each section and monitor real-time data
  • Ethernet (1 Gbps) and USB2.0 connectivity
  • Web-based Graphical User Interface to remotely control the module and access advanced features

Overview

The N1081B –Four Fold Programmable Logic Unit is a laboratory tool that incorporates in a single NIM module the most common functionalities that you need to implement the logic capabilities of your experiment.

The module is organized in four sections, with 6 inputs and 4 outputs each accepting TTL/NIM signals, with the possibility to feed in analog signals and process them through a leading-edge discriminator. The input stage features an asynchronous Gate&Delay with 5 ns resolution while the output stage feature an asynchronous Monostable stage. This allows the user to trim at best the needed parameters and to perform accurate measurements using the available logic functions.

Each section is configurable independently according to one of the available pre-programmed functions. The board configuration can be performed using the 2.8” touch screen display or via the web-interface, accessible via USB or Ethernet.

On the touch screen interface, each function is associated to a widget, meant to be used for  configuration and monitor purposes.

The web-interface allows the user to remotely configure the instrument via USB or Ethernet, monitor the functions output, dump data on file or history chart and access to the most advanced functions. No software installation is required!

 

Developed in collaboration with 

Technical Specifications

General

Form Factor 2U NIM module

No. of sections

4 sections, independently programmable.

Possibility to daisy chain more sections to make them operate as a single function with multiple inputs.

Functions

Logic
FANOUT, WIRE, AND, OR, OR+VETO, MAJORITY, MAJORITY+VETO, LUT, COINCIDENCE

Counter
SCALER, COUTER, COUTNER RIMER, CHRONOMETER, RATE METER

Timing
TIME, TAGGING, ToF, ToT

Generator
PULSE GENERATOR, DIGITAL GENERATOR, PATTERN GENERATOR

Input

Nr. of inputs: 6 per section CH 3 and CH 6 may be reserved for special function

Connector: LEMO

Input impedance: 50 Ω / 1 kΩ

Signal type NIM/TTL/DISCR, DISCR is an arbitrary signal fed to the leading-edge discriminator

Min input width: 2 ns

Min input voltage: ±10 mV in DISCR mode

Gate and Delay stage:

  • Gate: 15ns ÷ 10µs
  • Delay: 0 ÷ 10µs
  • Step: 5ns
  • Resolution: ±1% ±3 ns
Output

Nr. of outputs: 4 per section

Connector: LEMO

Signal type: NIM/TTL

Min output width: 5.5 ns Measured with -500 mV signal, -200 mV threshold , WIRE function

Output NIM rise/fall time: ≤2.5 ns

Output TTL rise/fall time: ≤5 ns

Output TTL Amplitude: 3.1 V

Monostable stage

  • Width: 15ns ÷ 1µs
  • Step: 5ns
  • Resolution: ±1% ±3 ns
Minimum I/O delay

30 ns – G&D and Monostable disabled

40 ns- G&D enabled, Monostable disabled

40 ns- G&D disabled, Monostable enabled

55 ns – G&D and Monostable enabled

 

Measured in WIRE mode

Leading Edge Discriminator

Operation mode

  • Time over Threshold (G&D and Monostable disabled)
  • Non-updating (when Monostable output is enabled)

 

Min. input voltage: ± 10 mV

Max Input Voltage: ± 5.2V

Threshold range: [-800 mV ÷ 2.5 V]

Threshold step: 1 mV

Non linearity: 4% ± 6.5 mV

Efficiency

  • 3 mV threshold variation to pass from 0% to 100% of the trig rate
  • Measured with -500 mV signal, WIRE function

 

Double pulse resolution

  • Time over threshold mode, NIM out : 10 ns à100 MHz
  • Time over threshold mode, TTL out : 12.5 ns à 80 MHz
  • Non-updating mode, 25 ns à 40 MHz

 

Reflections

≤ 2% on input signals (measured with -200 mVpp signal)

Methodology note: all the technical specifications of the Leading Edge discriminator are based on the x1081B working in WIRE function, to replicate a standard discriminator unit

Max. sustainable frequency
  • Asyncronous functions, NIM out à 100 MHz
  • Asyncronous functions, TTL out à 80 MHz
  • Syncronous functions, à 40 MHz
  • Scaler max. division rate à 130 MHz

Methodology note: these technical specifications are based on measurements done with 3.3 V pulses, 2 ns width, 400 mV threshold

AND

Minimum overlap: 1.5 ns

VETO

Veto must precede the event by at least 3 ns

Timing functions

Minimum detectable time: 13 ns

Resolution: 10 ns

Bin size: [10 ns ÷ 1s], up to 1024 bins

Time reconstruction: t = 13 ns + bin size*bin number

Pulse Generator
Signal type

NIM/TTL

 

Max. frequency

20 MHz

Min. pulse width

10 ns

Connectivity

Ethernet (1Gbps) , USB 2.0

Touchscreen

2.8” LCD, Transmissive type

Software

– Touch screen widgets
– Web-based Graphical User Interface

Power consumption

1.5 A @ 12V (Typ.)

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Videos

N1081B - Quickstart

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Code Description
WN1081BXAAAA N1081B - Four Fold Programmable Logic Unit   RoHS

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