Im an in thr process of developing a personal area network for a system i am working on. The hardware for this implementation was previously developed by another contractor and i am stuck with it as far as what ive seen the antenna tuning on the legacy equipment is not up to par as i am getting very poor RSSI and distance. Communication tends to drop out at about 20 to 30 feet with the 10db settting, 250kbaud MSK, data whitening, and FEC. I am stating to get frustrated with this system as i am using all the settings from the RF Studio program for sensitivity and still am getting pour results. Right now i am looking for any sugjestions that might help. just to let u know id like transmissions of say 100 ft and a lower power setting if i could get it.
It sounds like your HW is not optimum yes, as we have measured with our kits a LOS range of ~230 m with 0 dBm output power and 250 kbps, https://community.ti.com/forums/p/2277/8724.aspx#8724. What environment are you measuring in? What kind of antenna is used? Does your HW have a SMA connector? Have you performed any conducted measurements? This could tell us whether or not it is the layout or the antenna that is causing your poor range.
We have determined that all the antenna in these devices are not optimum and at best are 15-20db less powerful/sensative than the cc1111 kit which i am developing on now as a crutch we have gone with lower data rate to increase GBP and taken FEC out it seems to work better but the HW is the deffinate issue and there is not much that can be donw with that.
What about a new PCB, that can be done quite cheaply and if you use a PCB antenna or a chip one, you are not spending for much, if any, new hardware. Losing 20 dB with the antenna is horrible.
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