Need filters & antennas for 900Mhz SMs (9000SMC)

I’m having problem with Jitter with several of my customers running the 9000SMC SMs.

I have two APs … one AP #1 set at 906Mhz and AP #2 set at 915Mhz. I’d like to get SM filters to only let 906Mhz through for customers on AP #1 and and filters to only let 915Mhz through for customers on AP #2. I’d like to see if filters help. Any input would be appreciated.

I’m also looking for horizontally polarized corner reflector antennas to help reduce Jitter (eg. interference, multipathing, etc.). Does anyone know of any? The MCR900 and DB495-B are both vertically polarized.

Gregg Smith