---
# System prepended metadata

title: 'Beam Test 2: Next'
tags: [Beam-Test, DeWei]

---

## Outline

* Possiable replacement for our PD
* Change Rgain fron 100Meg to 51Meg (x4 Boards)

## Possiable replacement for our PD (To try)

||[SFH250V](https://www.farnell.com/datasheets/3029078.pdf) (Present)| [FR00AHAR](https://fiberfin.com/custom/upload/File-1535472897.pdf) (To try)|
|--|--|--|
|**Connection**|Versatile link -> empty(PD)| **Present Versatile link fiber both terminal**: <br>Polishing/Assemble are not necessary|
|Responsivity (A/W) |0.24 - 0.44|0.3 - 0.42|
|Price|250+: 10 usd/pcs| 200+: 8.22 usd/pcs|

* [2m fiber AVAGO/BOARDCOMM](https://www.mouser.tw/ProductDetail/Broadcom-Avago/HFBR-RNS002Z?qs=jT9z6tsiFNk1gO4cLbS1UQ%3D%3D)
* [1m fiber AVAGO/BOARDCOMM](https://tw.element14.com/broadcom-limited/hfbr-rns001z/cable-optical-fibre-1m-poly/dp/1247706)
* [Fibercomm](https://www.firecomms.com/contentFiles/technicalDocuments/Cable-Assemblies-Datasheet-Rev-C.pdf)
* Green LED can be used for test [FT01MHNG](https://www.firecomms.com/contentFiles/technicalDocuments/FT01MxNG-Datasheet-Rev-D.pdf)

## Change Rgain fron 100Meg to 51Meg (x4 Boards)
* Change Rgain fron 100Meg to 51Meg (x4 Boards)
  * Protecion for saturation
  * Even 22/30 Meg is enough
* One board as *Gain scaned board*
* VGA-GPTO transfer board
  * Testing [SPI mode](https://www.analog.com/en/resources/analog-dialogue/articles/introduction-to-spi-interface.html)
* ![](https://i.imgur.com/RGNckMW.png)