Telemetry-Compatible Webcams


Description

Our Telemetry-Compatible Webcams (TCWs) are an alternative to our Animal Cage Cameras (ACCs). The TCW is a fraction of the cost of an ACC, but the synchronization it provides is no better than a ±10 s drift per day, compared to the ACC's sustained and absolute ±100 ms synchronization.


Figure: Telemetry-Compatible Webcam (TCW1B). The camera itself is manufactured by MicroSeven. We supply the camera with a short, shielded network cable and a long, unshielded netrok cable.

Commercially-available webcams can distrupt reception of our subcutaneous transmitter (SCT) signals. Our TCW cameras are models we have tested with our SCT system, and for which we have measured microwave power radiation with our own instruments. We guarantee that they will not disturb your SCT recordings. They are just as convenient to use as our ACCs, in that they are Power over Ethernet (PoE) devices that require only one ethernet cable for power and communication.


Figure: Telemetry-Compatible Webcam (TCW1B) in Box. The box shows the model numbewr and manufacturer of the camera. The sticker shows that we have opened the box, checked and tested the camera, inserted the correct cables, and sealed it again.

We package each TCW with the cable you need to connect it to the wall of a Faraday enclosure, and from the wall to the PoE switch.

Hardware Setup

The TCW is a Power-over-Ethernet (PoE) webcam. It requires only one ethernet cable connection for power and communication. We place the camera inside a Faraday enclosure and connect it to an ethernet feedthrough in the enclosure wall. In the photograph below we see a free-hanging ethernet feedthrough connecting the blue and black ethernet cables that make the connection between the PoE switch and the webcam.


Figure: Cable Connections for a Telemetry-Compatible Webcam (TCW1B). This MicroSeven webcam provides a white cable into which we plug a blue, shielded ethernet cable. The other end of the blue cable connects to an ethernet feedthrough, which is visible behind the white dome of the camera. A black unshielded ethernet cable connects to a PoE switch.

We recommend an unshielded cable from the PoE switch to the ethernet feedthrough, then a shielded cable from the feedthrough to the cable provided by the camera. The shielded cable within the enclosure is necessary to minimise the transmission of noise by the ethernet signals, which can otherwise disturb reception of our telemetry signals. The unshielded cable from the Faraday enclosure wall to the PoE switch guarantees that there will be no ground loops created by the various webcam cables. If you use a shielded cable instead of an unshielded cable, it is unlikely you will experience any problems with ground loops, but it is possible. If you have only shielded cables, use them, and if you find the cameras are rebooting themselves, or stalling, every now and then, buy some unshielded cables and try them instead.

Software Setup

Coming soon...