Back when the 900 450 first started shipping, we discovered a couple bad
SMs. Linktests were in the dirt no matter what. I don't remember if the
modulations were always low or not. I'm thinking everything looked
normal which was why we were so confused. But we put another SM in place
and it went from something like 4Mbps aggregate to over 20. And repeated
this at a couple locations. So we set those aside and moved on.
As others have said, what do linktests look like? And what about uplink
and downlink modulations? What are the power levels? Hotter than -40dBm
is too much.
My question would be, why are you using 900 for LOS and/or extremely
short range? I'd put up an ePMP 2k on an omni and call it done.
Also keep in mind that the 900 450 SMs do NOT have the filtering that
the 450i AP does. They're just that, a standard 450 SM. So if you're
running zero guard band on your cluster, a really close SM could
definitely be seeing adjacent channel interference.
On 1/26/2018 9:11 AM, Phil Lambert wrote:
We have a problem with 900PMP450i. We have 4 APs on a tower. We have
a customer that is very near (1/10 mile) with clean LOS. But for some
reason, the customer can’t get any speed. We speculated that perhaps
the SM was seeing too much signal from different APs? We’ve tried
locking the SM down by frequency to no avail. Note; all APs on the
tower have the same color code. Note; this is actually happening with
two different customers each connected to different towers not in
proximity with each other.
Any theories?
Regards,
Regards,
Phil Lambert
General Manager
812.759.7905
Q-Wireless, LLC
4209 US Hwy 41 N, Suite 23
Evansville, IN 47711
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