# Using the Interface Board

The Interface Board (AXS83695) converts the differential Sweep Trigger, Digital K-Clock, and OCT Balanced Receiver outputs from SATA connectors into corresponding single-ended signals on SMA connectors for viewing on an oscilloscope. The Interface Board is also known as OCT Bulkhead PCB. 

![Perspective View of the Interface Board](https://3144558317-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LP1icDU_wgMhPOYQY7u%2F-LRDZ_D0ca7RmR2BOgRq%2F-LRDZeNrjqm_myQpBVm9%2FAXS83695.jpg?alt=media\&token=adf1d80d-382d-4b01-a39a-5ce900cbf6d0)

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### Making Connections

![](https://3144558317-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LP1icDU_wgMhPOYQY7u%2F-LYTfOYsKeAq36yGDu-x%2F-LYTfUfItMV9n0d_F7BG%2FConnectionsInterfaceBoard.png?alt=media\&token=70d01796-c9a9-4a20-ad03-25bd21efebbf)

Below is a list of connections:

* SATA cable 1 connects J1 on the Interface Board to J2 on the balanced receiver board (top board) for Channel 1 & Channel 2 OCT Balanced Receiver signals.
* SATA cable 2 connects J2 on the Interface Board to J2 on the laser board (bottom board) for Sweep Trigger and Digital K-Clock signals.

{% hint style="danger" %}
**WARNING:**  All electrical signal connections and disconnections must be made with the Engine and Interface Board in a powered-off state.
{% endhint %}

* P3 on DC power-Y cable connects to J4 *or* J5 on the Interface Board (either will work).
* P1 *or* P2 on DC power-Y cable connects to J3 on the laser engine (either will work).

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### Output Signals

![](https://3144558317-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LP1icDU_wgMhPOYQY7u%2F-LdPcDU-MWTJxrCaXE9A%2F-LdPdAymnTqncdJ5svyR%2FOCTbulkheadbottomview.png?alt=media\&token=88dde0dd-d1d8-4346-aa54-1f5f4c27eab6)

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### Mounting

The interface board can be mounted using the SMA connectors. 

Make sure to place round Nylon spacers (¼ inch inner diameter) between the board and the mounting plate. 

Use the gold plated lock and nut supplied on each SMA connector. 

![Mounting interface board example](https://3144558317-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LP1icDU_wgMhPOYQY7u%2F-Laa8hLBJCFnkzefXwDF%2F-Laa9QLNHERJVT-1l5XH%2Fmountinginterfaceboard.jpg?alt=media\&token=104ca5c2-5e8a-4a71-884c-eb1e8425dc81)