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Support #3524

assemble + test SFP breakout board

Added by laforge 3 months ago. Updated 3 months ago.

Status:
Resolved
Priority:
Normal
Assignee:
Target version:
-
Start date:
09/05/2018
Due date:
% Done:

100%


Description

Following the design of #3313, let's assemble and test the first board to verify the design.

180905_193427.png View 180905_193427.png 18 KB roh, 09/05/2018 05:45 PM
180905_193324.png View 180905_193324.png 18.4 KB roh, 09/05/2018 05:45 PM
180905_193146.png View 180905_193146.png 19.4 KB roh, 09/05/2018 05:45 PM
180905_193057.png View 180905_193057.png 18.1 KB roh, 09/05/2018 05:45 PM
180905_192932.png View 180905_192932.png 20.1 KB roh, 09/05/2018 05:45 PM
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Related issues

Related to Misc Hardware Projects - Feature #3313: design simple SFP breakout boardResolved2018-06-03

History

#1 Updated by laforge 3 months ago

  • Related to Feature #3313: design simple SFP breakout board added

#2 Updated by roh 3 months ago

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i have done some tests with various frequencies from 10MHz to 155Mhz using the td_p and td_n port respectively and terminating the other one with 50ohm.

the attached scopeviews have the input signal (single sided) on ch3, and the rx_p and rx_n as channel 1 and 2.

on frequencies above ~75MHz the _p and _n signal are a bit timeskewed, but thats to be expected on a 155Mbit interface. for low frequencies the signal is nice and clear.

the only thing left to do would be a full system test with another board - not only one fibre which loops into the same sfp.

the scope traces are done at 10, 100, 155MHz and with inputsignal on tx_p and one with tx_n.

#3 Updated by mschramm 3 months ago

  • Status changed from New to In Progress

#4 Updated by roh 3 months ago

  • Status changed from In Progress to Resolved
  • % Done changed from 50 to 100

testing completed.
i can get signals through this pcb fine at the expected signal levels.

one wish: some arrows pointing IN inbetween the td_n td_p sockets, and one arrow pointing OUT inbetween rd_n rd_p

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