osmo-small-hardware.git updates
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:author:	Harald Welte <laforge@gnumonks.org>
:copyright:	2019 by Harald Welte (License: CC-BY-SA)
:backend:	slidy
:max-width:	45em


== What is `osmo-small-hardware.git`

* collection of small Open Source Hardware projects
* started in 2016 with `osmo-mv-uart` + `mpcie-breakout`
* expanded in 2018 with four more projects
* all projects OSHW
** most of them made available by sysmocom as alternative to DIY

== `osmo-mv-uart`

Dual USB-UART with selectable logic level voltage

image::mv-uart-front.jpg[]

== `osmo-mpcie-breakout`

image::mpcie-breakout-v3-perspective.small.jpg[width="100%"]

== `osmo-sfp-breakout`

image::sfp-breakout.jpg[width="100%"]

== `osmo-sfp-breakout`

* expose the differential rx/tx pair as two SMA sockets each
** can be used to transmit differential signals e.g. from FPGA differential drivers
* give access to all auxiliary signals of a SFP(+) transceiver on a 2.54mm header

== `osmo-sfp-experimenter`

image::sfp-experimenter.jpg[width="100%"]

== `osmo-sfp-experimenter`

* like `osmo-sfp-breakout`, but
** onboard LVDS receiver
** onboard LVDS transmitter
** single-ended Rx/Tx via SMA sockets


== `osmo-sfp-experimenter`

image::sfp-experimenter1.jpg[width="100%"]

(thanks to Sylvain)

== `osmo-clock-gen`

* SI5351C software-programmable clock generator
* ATSAMD11 microcontroller on v1
** to be upgraded to SAMD21 on v2
* I2C EEPROM to store register values
* control via UART (@3.3V on 2.5mm jack) or USB
* all eight clock outputs available as U.FL or SMA
* 100x50 mm form-factor

== `osmo-clock-gen`

image::osmo-clock-gen-v1-top.jpg[width="100%"]

== `osmo-clock-conv`

* low phase noise, dual-output sine -> square converter
** based on https://www.analog.com/media/en/technical-documentation/data-sheets/6957fb.pdf[LTC6957-4] chip
** Additive jitter: 45 - 109 fS (RMS)
** Low Skew: 3ps typical
* 100x50 mm form-factor

== `osmo-clock-conv`

image::osmo-clock-conv-v1-top.jpg[width="100%"]

== 100x50 mm form-factor

Idea was to build several "clock blocks" in same PCB form factor

* 100 mm width can be used in 3U 19" carrier for large quantity of boards:

image::bgt384.jpg[]

== 100x50 mm osmo-clock form-factor

Idea was to build several "clock blocks" in same PCB form factor

* alternatively, 1-4 boards slotted into this style of enclosure:

image::tuf105_52.jpg[]


== Further Reading

* https://git.osmocom.org/osmo-small-hardware/
* https://osmocom.org/projects/mv-uart/wiki/Wiki 
* https://osmocom.org/projects/mpcie-breakout/wiki
* https://osmocom.org/projects/osmo-clock-gen/wiki
* https://osmocom.org/projects/osmo-clock-conv/wiki
* https://osmocom.org/projects/misc-hardware/wiki/Sfp-breakout
* https://osmocom.org/projects/misc-hardware/wiki/Sfp-experimenter

== EOF

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