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DTS FO Hardware Design Bryan Anderson Jodrell Bank Observatory

DTS FO Hardware Design Bryan Anderson Jodrell Bank Observatory. Co-authors: D.C. Brown, M. Bentley & R. McCool. Contents of Talk. Fibre Interconnects (everywhere) Optical Receiver (correlator, AOS or OSF) Optical Transmitter (antenna) Optical Multiplexer-Monitor Module (antenna)

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DTS FO Hardware Design Bryan Anderson Jodrell Bank Observatory

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  1. DTS FO Hardware DesignBryan AndersonJodrell Bank Observatory Co-authors: D.C. Brown, M. Bentley & R. McCool

  2. 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. Optical Receiver

  4. 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, +5V @ 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

  5. Optical Demux-Switch Module

  6. 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 • 4 - 6 crates per rack • Requires total of 3 - 4 racks

  7. 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

  8. 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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