PCal Photodiode Board

Document #:

LIGO-D1300210-v4

Document type:

D - Drawings

Abstract:

This is the board that goes in the PCal Photodiode Housing, D1300103

There are two types of boards that have been (probably mistakenly) combined in this file card using different versions. There really should be two "types."
Type 1, captured in v4, is the board that we use at the end stations for the Tx and Rx power sensors. It has a differential output.

Type 2, captured in v5, is the board we use for the Pcal transfer standards (working standards, gold standards, and transfer standards). It has a single-ended output.

Going forward, in order to use this single file card, I suggest we continue to designate whether it is a Type 1 or Type 2 board in the "Notes and Changes" field.

Files in Document:

• pdf of schematic and pcb (PCalPDv4.pdf, 293.7 kB)

Other Files:

• Packaged Altium Project (PCalPDv4 (2-9-2017 4-42-53 PM).zip, 516.9 kB)
• odb++, Gerber files pick-n-place and BOM (PCalPDv4.zip, 91.2 kB)

ICS/JIRA Record:

• ICS_LINK

Topics:

• Auxiliary Optics

Authors:

• Benjamin Abbott

Keywords:

PD PCal Photodiode Photon Calibrator

Notes and Changes:

This latest rev. added some bias current balancing resistors, and some compensation capacitors to the pcb. Also added was a GND testpoint.

Related Documents:

• LIGO-D1300103: aLIGO Pcal Photodetector Assembly

Referenced by: