115 lines
2.8 KiB
Plaintext
115 lines
2.8 KiB
Plaintext
osmo-small-hardware.git updates
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===============================
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:author: Harald Welte <laforge@gnumonks.org>
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:copyright: 2019 by Harald Welte (License: CC-BY-SA)
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:backend: slidy
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:max-width: 45em
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== What is `osmo-small-hardware.git`
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* collection of small Open Source Hardware projects
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* started in 2016 with `osmo-mv-uart` + `mpcie-breakout`
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* expanded in 2018 with four more projects
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* all projects OSHW
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** most of them made available by sysmocom as alternative to DIY
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== `osmo-mv-uart`
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Dual USB-UART with selectable logic level voltage
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image::mv-uart-front.jpg[]
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== `osmo-mpcie-breakout`
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image::mpcie-breakout-v3-perspective.small.jpg[width="100%"]
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== `osmo-sfp-breakout`
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image::sfp-breakout.jpg[width="100%"]
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== `osmo-sfp-breakout`
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* expose the differential rx/tx pair as two SMA sockets each
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** can be used to transmit differential signals e.g. from FPGA differential drivers
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* give access to all auxiliary signals of a SFP(+) transceiver on a 2.54mm header
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== `osmo-sfp-experimenter`
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image::sfp-experimenter.jpg[width="100%"]
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== `osmo-sfp-experimenter`
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* like `osmo-sfp-breakout`, but
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** onboard LVDS receiver
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** onboard LVDS transmitter
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** single-ended Rx/Tx via SMA sockets
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== `osmo-sfp-experimenter`
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image::sfp-experimenter1.jpg[width="100%"]
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(thanks to Sylvain)
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== `osmo-clock-gen`
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* SI5351C software-programmable clock generator
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* ATSAMD11 microcontroller on v1
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** to be upgraded to SAMD21 on v2
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* I2C EEPROM to store register values
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* control via UART (@3.3V on 2.5mm jack) or USB
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* all eight clock outputs available as U.FL or SMA
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* 100x50 mm form-factor
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== `osmo-clock-gen`
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image::osmo-clock-gen-v1-top.jpg[width="100%"]
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== `osmo-clock-gen` future use case
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image::DSC00013.JPG[width="100%"]
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== `osmo-clock-conv`
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* low phase noise, dual-output sine -> square converter
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** based on https://www.analog.com/media/en/technical-documentation/data-sheets/6957fb.pdf[LTC6957-4] chip
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** Additive jitter: 45 - 109 fS (RMS)
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** Low Skew: 3ps typical
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* 100x50 mm form-factor
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== `osmo-clock-conv`
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image::osmo-clock-conv-v1-top.jpg[width="100%"]
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== 100x50 mm form-factor
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Idea was to build several "clock blocks" in same PCB form factor
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* 100 mm width can be used in 3U 19" carrier for large quantity of boards:
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image::bgt384.jpg[]
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== 100x50 mm osmo-clock form-factor
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Idea was to build several "clock blocks" in same PCB form factor
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* alternatively, 1-4 boards slotted into this style of enclosure:
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image::tuf105_52.jpg[]
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== Further Reading
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* https://git.osmocom.org/osmo-small-hardware/
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* https://osmocom.org/projects/mv-uart/wiki/Wiki
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* https://osmocom.org/projects/mpcie-breakout/wiki
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* https://osmocom.org/projects/osmo-clock-gen/wiki
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* https://osmocom.org/projects/osmo-clock-conv/wiki
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* https://osmocom.org/projects/misc-hardware/wiki/Sfp-breakout
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* https://osmocom.org/projects/misc-hardware/wiki/Sfp-experimenter
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== EOF
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End of File
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