GLIB CARD

The Gigabit Link Interface Board (GLIB) is an FPGA-based system for users of high speed optical links in high energy physics experiments. The GLIB serves both as a platform for the evaluation of optical links in the laboratory as well as a triggering and/or data acquisition system in beam or irradiation tests of detector modules. The major hardware component of the platform is the GLIB Advanced Mezzanine Card (AMC) [2] that can be used either on a bench or in a μTCA [3] crate. The GLIB AMC is based on a Xilinx Virtex-6 FPGA with Multi-Gigabit Transceivers (MGT) operating at rates of up to 5 Gb/s. This performance matches the specifications of the Gigabit Transceiver (GBT) [4] and Versatile Link [5] [6] projects with targeted data rate of 4.8 Gb/s.

Documentation can be found here:

2010 JINST 5 C11007

GLIB_v3 User Manual

Glib Public Page

GBT FPGA

The GBTx is a radiation tolerant chip that can be used to implement multipurpose high speed (3.2-4.48 Gbps user bandwidth) bidirectional optical links for high-energy physics experiments. Logically the link provides three “distinct” data paths for Timing and Trigger Control (TTC), Data Acquisition (DAQ) and Slow Control (SC) information. In practice, the three logical paths do not need to be physically separated and are merged on a single optical link as indicated in Figure 1. The aim of such architecture is to allow a single bidirectional link to be used simultaneously for data readout, trigger data, timing control distribution, and experiment slow control and monitoring. This link establishes a point-to-point, optical, bidirectional (two fibres), constant latency connection that can function with very high reliability in the harsh radiation environment typical of high energy physics experiments at LHC.

Documentation:

2015 JINST 10 C03021

User Manual

GBT Project page

Single link loopback

The single-link example design, consists of a GBT Bank implementing one GBT Link. The Tx is connected to a pattern generator whilst the Rx is connected to a pattern checker. The serial lanes of the GBT Link may be connected in loopback but also to any other GBT compatible device. Follow Chapter 3 of the user manual.

-- JorgeArmandoBenitez - 2015-01-07