Simplex G-LINK S-LINK Cards

LDC-S-40-B/W-5.0-80

Simplex G-LINK Link Destination Card

DESCRIPTION

To test the usability of the Hewlett Packard G-LINK for use as a front-end link for the LHC detectors, simplex G-LINK transmitter and receiver cards have been made. Those cards use the HP HDMP-1022 and HDMP-1024 chips, the 5 Volt version of the G-LINK.

The cards originally were designed for the PLD irradiation test project from Zoltan Meggyesi. Other radiation measurements of the Link Source Card will be done by Peter Denes from Princeton University and Jim Pilcher from the University of Chicago who received prototypes of the LSC and LDC.

A normal, full-speed (40 MHz) 16-bits, or half speed 32-bits simplex S-LINK has been built with those cards as well and can be considered as a radiation tolerant front-end link design (without any guarantees though).

The cards are not commercially available. Please contact Erik van der Bij if you would like to use those cards in testbeams.

Main features

Optical transmission (850 nm) with SC or ST-type connector
Electrical transmission with dual LEMO connectors
40 MHz clock to Loopback inputs
All low-speed I/O of HP connected directly to the Altera or Actel components
Measures optical received power
Measures temperature of G-LINK
Protocol (e.g. checking received datapattern or full S-LINK protocol) programmable in Altera or Actel
PCB design with state-of-the-art power decoupling and layout for EMC
Can connect directly to any S-LINK ROMB such as PCI and PMC interfaces and S-LINK test tools

STATUS

Hardware

December 1998	Link Destination Card debugged
March 1999	Link Source Card debugged
23 July 1999	S-LINK version made out of it

Radiation Measurements

March 1999	Zoltan Meggyesi's test setup installed in SPS test beam, results will be available in June 1999
July 1999	Zoltan Meggyesi has made radiation tests in PSI, the Paul Scherrer Institut Switzerland
November 1999	Jim Pilcher and K. Anderson of TileCal have made radiation tests at NIST, Maryland
January 2000	ATLAS LArg publishes final results of their tests made in 1999

DOCUMENTATION

G-LINK Link Source Card
G-LINK Link Destination Card
K. Anderson et al., Neutron Irradiation Tests of an S-LINK-over-G-link System,November 1999
M-L. Andrieux et al., Single Event Upset Studies of a High Speed Digital Optical Data Link, January 2000

Describes tests of the G-LINK HDMP-1022 and the Methode transceiver done by the ATLAS LArg community. Note that the G-LINK and Methode transceiver are used at higher rates than their specifications allow.

CONTACTS

CERN - High Speed Interconnect - S-LINK
Erik van der Bij - 22 December 2000