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Feature #3272

closed

next-generation osmo-e1-xcvr board

Added by laforge almost 6 years ago. Updated over 3 years ago.

Status:
Rejected
Priority:
Normal
Assignee:
Category:
-
Target version:
-
Start date:
05/15/2018
Due date:
% Done:

70%

Spec Reference:
Tags:
E1

Description

Since osmo-e1-xcvr is full of bugs, and it doesn't yet include a microcontroller, it might be worth collecting ideas about a next board version.

As soon as I have my SAM4S firmware code working, I guess it would be a good idea to make a board that contains
  • a (fixed) osmo-e1-xcvr
    • no missing GND on Vref resistor
    • no wrong transformer symbol/layout
    • proper silkscreen
    • make sure IC pin is connected to GND as specified in data sheet
  • a suitable SAM4S
  • a first version of the GPS-DO (mschramm: we can use the DAC and maybe also the voltage reference from sob-jb, but drive a 30.72 MHz OCXO from it)

For people working on a non-SAM4S approach, that part could simply be DNP, as long as we still have headers (possibly with identical pinout) for SPI + serial data stream, it would remain copatible. Basically one could populate either the LIU+magnetics part, and/or the SAM3+USB part, and/or the GPS-DO part.


Files

GNS2201_datasheet.pdf View GNS2201_datasheet.pdf 1.14 MB laforge, 05/16/2018 08:07 PM
GNS3301_datasheet.pdf View GNS3301_datasheet.pdf 1.28 MB laforge, 05/16/2018 08:08 PM
GNS3301B_datasheet.pdf View GNS3301B_datasheet.pdf 1.19 MB laforge, 05/16/2018 08:08 PM
Venus828F_PB_v1.pdf View Venus828F_PB_v1.pdf 177 KB laforge, 05/16/2018 08:08 PM
T604.pdf View T604.pdf 1.47 MB Connor-Winfield T604 VCTCXO (280ppb) laforge, 05/16/2018 08:11 PM
XO-0040-VT-CMOSTYPE.pdf View XO-0040-VT-CMOSTYPE.pdf 298 KB Taitien VT VCXO (50ppm) laforge, 05/16/2018 08:13 PM
GNS3301.lbr GNS3301.lbr 18.6 KB EAGLE library for GNS3301/2201 laforge, 05/23/2018 10:55 AM
laforge.lbr laforge.lbr 520 KB laforge, 06/27/2018 08:43 AM
MAX521x.lbr MAX521x.lbr 8.87 KB MAX5215 DAC library laforge, 06/27/2018 08:45 AM
MAX616x.lbr MAX616x.lbr 8.89 KB MAX6163 precision reference library laforge, 06/27/2018 08:45 AM

Checklist

  • SAM4S
  • GPS receiver with 1PPS output
  • VC[TC]XO driven by DAC [of SAM4?]
  • possibly precision voltage reference for DAC?
  • LIU
  • magnetics matching to LIU and with fixed symbol/footprint
  • SAM-BA capable UART (PA9/PA10?) on 2.5mm jack (SJ-2523-SMT)

Subtasks 2 (0 open2 closed)

Feature #3275: release connor-winfield + SJ-2523 EAGLE footprints Resolvedmschramm05/16/2018

Actions
Feature #3781: assemble E1 interface boardsResolvedroh02/05/2019

Actions

Related issues

Related to E1/T1 Hardware Interface (including icE1usb) - Feature #3237: Come up with GPS-DO design for E1 InterfaceRejectedvogelchr05/04/2018

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