RF OPTICAL RECEIVER MODULE

DIGITAL VERSION

Last updated: 30/07/2008 15:32

As most of the timing signals being transmitted by the AB/RF links are digital, a equivalent of the RF_Tx_A and RF_Rx_A was proposed, which is much cheaper.

The Digital version of the RF transmitter and receiver is based on the OCP SDH/SONET transmitters, and on the Truelight TRR-1B43-000 or the OCP receivers. As it is difficult to provide one single pair of  laser/receiver able to deal with 5ns pulse at 11kHz, as well as 400MHz clock, the idea was to provide a single Tx board and a single Rx board, with the possibility to plug various types of transmitters and receivers.

A first evaluation of SDH/SONET transmitters and Truelight receivers was done before designing the boards. The results can be found  here.

The Version 1 of the boards was thus designed, and various pairs of transmitter/receiver were identified to match each type of signal transmission.

VERSION1 MODULES:

                                            RF_Tx_D                                                            RF_Rx_D

                                            EDA-01380                                                        EDA-01382

DOCUMENTATION:

• OCP-STX and SRX modules datasheet

• TRR-1B43-000 datasheet

• First evaluation of the SDH/SONET and TRR transmitters and receivers

• Final test of the Version1 modules

• EDMS Schematics and Layout of the RF_Tx_D: EDA-01380

• EDMS Schematics and Layout of the RF_Rx_D: EDA-01382

• RF_Tx_D User Manual

• RF_Rx_D Simplified User  Manual

• RF_Rx_D Hardware User Manual

• CVS repository for RF_Tx_D and RF_Rx_D graphical control panels (tcl&tk panels)

• Money spent for the RF_Tx_D and for the RF_Rx_D: 50% of the prototypes paid by AB/RF, 50% paid by PH/ESS. Production will be paid by the experiments.

• Updated prices (5 pieces of each. Study deduced):

  • RF_Tx_D: ~3kCHF (3 links)

  • RF_Rx_D: ~2kCHF (3 links)

PRODUCTION MAINTENANCE AND SUPPORT:

AB/RF/FB commitment on the maintenance of the RF_Tx_D and RF_Rx_D modules (07/12/06).

"The prototype v1 RF_Rx_D and RF_Tx_D have been tested in November with the LHC signals: 5 ns,1 Vpk pulses (Orbit), 40 MHz square and sine wave (Bunch Clock) and 400 MHz (RF). The results are fully satisfactory. See report by S. Baron.
As the designer in the PH department is leaving, AB/RF/FB takes responsibility for the future of these modules:
We will launch a version 2 in January 2007. This version 2 has only minor differences with version 1.
In parallel we will start ordering key components such as the optical TX and RX.
By April 2007 we launch series production for installation in summer 2007.
The transmission can then be commissioned in Sept 2007. (If this schedule is not satisfactory it can be discussed).
PH department should take care of the order and installation of the modules used by the experiments except at the sending end SR4 and in the RF racks in CCR. The modules used by the experiments will be paid by them, including spares stored locally.
During LHC operation AB/RF/FB will be responsible for maintenance and piquet service on these transmissions. The modules are equipped with diagnostics and PH will make these diagnostics "readable" by AB/OP and AB/RF. (As the OS in the VME CPU is different in AB and PH, some "driver" must be developed by PH. To be discussed).
The modules (eda-01380 and eda-01382) are fully documented in edms so that for future orders the user will contact TS/DEM directly."
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Last Updated by Sophie BARON on 30/07/2008 15:32