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Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain AtacamaLargeMillimeterArray DTS FO Hardware Design Bryan Anderson Jodrell Bank Observatory.

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Presentation on theme: "Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain AtacamaLargeMillimeterArray DTS FO Hardware Design Bryan Anderson Jodrell Bank Observatory."— Presentation transcript:

1 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain AtacamaLargeMillimeterArray DTS FO Hardware Design Bryan Anderson Jodrell Bank Observatory Co-authors: D.C. Brown, M. Bentley & R. McCool

2 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 2 ALMA Project Contents of Talk Fibre Interconnects (everywhere) Optical Receiver (correlator, AOS or OSF) Optical Transmitter (antenna) Optical Multiplexer-Monitor Module (antenna) Optical-Fibre Amplifier Module (AOS) Optical Demultiplexer-Switch Module (AOS/OSF) Monitor, Control and Safety

3 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 3 ALMA Project

4 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 4 ALMA Project

5 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 5 ALMA Project Optical Receiver

6 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 6 ALMA Project

7 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 7 ALMA Project

8 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 8 ALMA Project Optical-Fibre Amplifier Module Uses an oem EDFA module –20 dB gain, +17 dBm output power –Size: 100 x 100 x 15 mm –Interface: RS232, 25-pin connector, 6 - 8W off 48V bus Plug-in with PIC controller, 8 per crate, 64 OFAM in 2 racks Keep-alive feedback from 4 sets of receivers

9 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 9 ALMA Project Optical Demux-Switch Module

10 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 10 ALMA Project Optical Demux-Switch Module Integrate demux-switch functions: hide 12 interconnects Make as plug-ins with PIC controller and power supply off 48V bus 4 ODSMs per crate crates per rack Requires total of racks

11 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 11 ALMA Project Monitor and Control Slaves: answer only Report the truth Remember calibrations and exceptions Parameters in non-volatile memory Monitor and control everything: no potentiometers Set/trip out philosophy for safety

12 DTS FO Hardware Design 25/08/2014 Back End Preliminary Design Review, 2002 April 24-25, Granada, Spain 12 ALMA Project Safety By design –Physical access restricted –Switch on under software control –Switch off via hardware or software Soft switching for transmitters? –Hardware keep-alives: OMMM to transmitters Receivers to optical amplifiers (256 twisted pairs!)


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