SR9-XR9 Noise Floor Issues

I’m not going to double post, but I wanted to make sure everyone knew this was posted as I think it’s fairly important if you use SR9’s or XR9’s…

http://forum.mikrotik.com/t/sr9-and-motorola/16457/15

That is some good information to have.

We have been exploring the idea of deploying the XR9 in our next Access Point - our there in the beach.

Some preliminary tests with our SR9 have shown very desirable noise floors, some figures close to -100 or -98. Since we are thinking about XR9s in the next roll out, this is some good info to think about.

Adam

keep in mind the poor reporting of the noise floor of the SR9, we’ve had links that show noise floors of -101 and have problems with interference… I’d suggest taking a spectrum analyzer, or at least a XR9 in 10mhz channels (and v3 frequency scan) to scan out there before making any decisions.

I haven’t gotten my XR9 test link up yet, however, the XR9 can see frequency usage that my SR9’s never showed.

I’ve heard some info on the XR9 vs SR9, but so far, the XR9 looks like a more together package than the SR9. At the very least, it appears to see spectrum usage the SR9 ignores.

We have had fantastic success with the SR9 units out here in the heavily forested Joy Woods. They seem to be able to work through dense thick red woods like nothing else.

We deployed them because at that time, there was nothing else available. They seem to have worked very well, with one strange quirk.

I think that the motherboard that supports the card may have a problem with the way that it provides power for these units. Once in a while, the 900 Mhz service seems to go away for a few minutes, while the log shows that all of our 900 Mhz clients re-registered at the exact same time. Makes me think that the radio card is going dark and rebooting after an extended period of time, say about six to nine minutes.

The positive thing about our SR9 deployment is that the area is electrically very quiet, as there is nothing around the community but redwoods. I think our noise floor with an omni is something like -96 or so.

Co-Channel is not a problem here!!

Adam