VMR-DIO-2CH-OPT project
Project Description
Overview
A VME rear transition module providing fiber-optic and electrical (RS485) inputs and outputs. Uses the CONV-TTL-RS485 as front-module. A block diagram of the board is shown below.
The design is based on the existing modules: optical transmitter CTDAB and optical receiver CTDPR.
Specifications
Note this is preliminary content.
Parameter | Value |
Supported fiber type | Single mode |
Allowed attenuation | max 10dB (10km fiber with 10 connections) |
Optical signal characteristics | Transmission/ Reception of CERN's GMT signal (500 kHZ DC balanced signal) and of single pulses: Minimum pulse width: 50 ns Maximum frequency: 10 MHz Maximum pulse width: 500 us Minimum frequency: 0 |
Latency due to electronics | < 40 us based on current system performance; measurement taken by triggering on the TTL input of the optical transmitter and measuring at the TTL output of the optical receiver, using only few cm of fiber |
Jitter due to electronics | <10 ns based on current system performance; measurement taken by triggering on the TTL input of the optical transmitter and measuring at the TTL output of the optical receiver, using only few cm of fiber |
Project Information
- "Developers notes"
Status
Date | Event |
15-07-2017 | Start working on project. |
06-09-2017 | First schematics for a prototype. |
Denia Bouhired-Ferrag - Erik van der Bij - 22 August 2016