Digital Optical

Soldering instructions

In the following, it is explained how to solder in up to 18

  • transmitters (Tx) Broadcom HFBR-1521Z or

  • receivers (Rx) Broadcom HFBR-2521Z.

In this example, 14Tx und 4Rx are soldered in.

  1. Click the optical transmitter and receiver together before soldering them

../../../_images/optical_solder1.jpg ../../../_images/optical_solder2.jpg ../../../_images/optical_solder3.jpg ../../../_images/optical_solder4.jpg
  1. Solder the transmitter/receivers on the top side of the PCB first

../../../_images/optical_solder5.jpg ../../../_images/optical_solder6.jpg
  1. After soldering the top side, shorten all the through-hole pins of the transmitter/receivers that now stick out on the bottom side of the PCB.

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  1. Click together the Rx and Tx for the bottom side, equivalent to step 1

  2. Cut the two pins, that are close to where the cable is plugged in, as short as possible. The referred pin is also cut in the picuture below.

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  1. Solder the transmitter/receivers on the bottom side. The shortened through-hole pins (in the schematic pin 5 and 8) are covered by the components on the top side. This is no problem, they do not have to be soldered, since they do not carry any electrical signal.

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