Analogue Front-End: James Salisbury continues to study the Op-Amp instability problems. The favoured solution is to use a single 2140 Op-Amp. Although this may not continue to be available beyond 2004, a replacement is sure to exist. The layout office will have finished the "rats nest" for this solution by the end of April. To control the voltage offset of the Op-Amp, an 8-bit DAC with 12 independent outputs has been found.
Power: Rob explained that the VME crate sends a signal to the board saying when the power supply voltages are available. We are responsible for transferring these voltages to the FED in the right order, with the correct slew rate.
Digital Back-End: The 1 MB SRAM will cost £20. The estimated cost of production FEDs is now 9.5 kCHF.
TD are considering putting test pads on the FED board, where the Opto-Rx will be, so it can be tested electrically before the Opto-Rx is in place.
IC now have Opto-Rx and Tx for the FED tester board and are acquiring the DAC. Software to run it exists.
John explained that the CMS On-line Software will use two packages: XDAQ and the `Hardware Access Library". The former makes it possible for seperate processes (such as those on the FED and FED crate controllers) to talk to one another. The latter simplifies Driver Software development for approved hardware platforms. We should use both for our FED testing software.
It was proposed that Karl and John should speak at P.-G. Verdini's on-line software meeting.
* RAL: Friday 10th May at ???.
* K.Bell should write statement for DAQ group on how we want S-Link to connect to FED.
This is urgent.
* R.Halsall will consider organising a trip to a manufacturing company during the next few
months.
* C.Foudas to consider implications of new FMM scheme described in meeting of 12/3/02.
* J.Coughlan will review the FED schedule by early May. - Are we on target ?
Minutes produced by Ian Tomalin.