I could be way wrong but I think a long cable slows transmission rates not signal strength. BE also recomends a cable no longer than needed for that reason.
You're correct though if the repeater is cheap enough, one outside would work. Feeding it power would be the issue. I'd love a plug in unit and could probably void the warranty and wire it to plug in. :)
Ok, lets talk about cables and antennas. I'll try to keep things fairly simple. The radio/amplifier puts out a certain amount of power. Any cables and connectors between the radio and connector reduce that power. Depending on antenna design it may increase the effective power in a particular direction. The amount of loss from cable varies. At 900 MHz, a 200-series cable may have 7 db of loss per 100' of cable and 400-series cable may have about 1/2 that.
Also keep in mind that the FCC regulates the amount of radiated power these devices can put out.
There are broader considerations than simply cable type/length and any attenuation from the structure. One of the biggest sources of signal attenuation is water at this frequency. Pines are effectively standing water. What you want is as much line of sight between cameras as possible. Much will depend on your terrain and vegetation.
Provided that cuddeback provides and external antenna connection, you could add an antenna. High gain Omni-directional antennas have pattern that looks kind of like a doughnut. Power is redirected from above and below the antenna more laterally. You can get these with up to about 8 db gain. Yagi antennas redirect power from behind the antenna to in front of it. The higher the gain, the narrow the beam in front of the antenna. 6db and 8db antennas are fairly small. Yagi's up to 14 db can be practical but they get much larger than 6db or 9db and the beam is much narrower.
Bill,
If your base is located with cameras on all sides, an Omni is the right choice. If you base is at the corner of your property, a yagi may be a better choice.
One more thing to consider. I don't know how weather resistant Cuddeback's base will be and how good the USB hardware will be, but you can buy pretty long active USB cables. You can test the active USB extension cables with the Cuddeback to make sure they work. If the device doesn't have issues and go on and off line, you'll do better with a long USB and a shorter Coax. Whether you use an external antenna or just place the base in a good transmission location in your house it is something to consider.
And just so Red doesn't think I'm above pointing out issues with BEC, this is one area where I don't think they paid enough attention during the design of the Orion series. For folks using antenna masts to get above vegetation, it would be much better to run a usb cable and power cable up the mast to the PC base than using the long 400-series cable runs from the PC base to the antenna. I did some testing with a couple active USB extension cables. They would run for a few days and then go off line. To be fair, this could be a shortcoming with the USB hardware in my old computer. However, I would have like to see them consider this an even offer an active USB extension cable they had tested with the base.
Maybe Cuddeback will consider this as well. The places that folks often put computers are often not the best place to put a transmitter/receiver.
Thanks,
Jack