Sfp-experimenter » History » Revision 2
Revision 1 (laforge, 10/07/2018 06:51 AM) → Revision 2/7 (laforge, 10/07/2018 06:54 AM)
h1. sfp-experimenter
This is the twin brother of the [[sfp-breakout]] board. It contains LVDS receiver/transmitter circuits, so you can use single-ended signals on the electrical side.
h2. Schematics / Design files
The schematics / design files are kept in git at https://git.osmocom.org/osmo-small-hardware/tree/sfp-breakout
You can see the design discussion in #3313 and notes from board-bringup at #3524
h2. Photos
!sfp-experimenter.jpg!
h2. Availability
h2. Errata
h3. sfp-experimenter v1
h4. R6 pull-down re-work
there was a need to place a bias resistor from RD_N to ground (pin4 on ic2) or the whole board would not work. ic2 has internal 100ohm prom pin3 to pin4 and pullups of ~300k to vcc. 100k pulldown on one leg pushes it into the proper operating range. due to the 100ohm its not neccessary to have more than one pulldown.
!sfp-experimenter-r6-rework.jpg!
