Hi,
I have a doubt about how an integrator did this installation of a ePMP3000. They use two antennas RF Elements HG3-CC-A90 to bring a 180 degrees sector for the AP 3000. But I am not sure if we are using a correct design and if we are doing well with the performance of the AP.
Could someone help me with your comments and advice?. Please.
Considerations:
How does this antenna array affect the operation and performance of the AP 3000?
If the AP 3000 is capable of serving two SMs simultaneously, can it continue to do so with this array of antennas? What about the MU-MIMO?.
Under this antenna configuration, can the AP 3000 continue to support the 120 SM per sector? There is two sectors, so how is the balance of this matter?
How is the 1.2 Gbps capacity of the AP affected by this antenna configuration?
If the antenna configuration is valid, Is the connection order of the antenna connectors do it in the correct sequence in the AP antenna connectors?
The 3000 has to be set to “Omni” in that config. That config works like the KPP and other MU Omni antennas.
Some other threads where this has been discussed and Cambium has chimed in (note that the “RF Elements Dual Horn Bracket” mentioned in the threads does not do what you are wanting to do. The dual horn bracket points both horns in the exact same direction / tilt.
To answer Quesiton #2 , according to Cambium yes MU works between customers on ANT-A and ANT-B but no personal experience with it. I would like to hear from people that have actually done it. I’m curious if vertical location of the CPE’s affects MU in this config like it does MU Sectors and also what happens with the CPE’s in the area were the two antennas overlap.
Question #3 the 120 SM per sector should probably say 120 per AP. But like #4 this number is way more than you will ever see in the real world and depends far more on the quality of your CPE connections, channel width (assumes 80Mhz) and the rates you are providing customers than the number of antennas you connect to the AP. Our best 3000 AP/Sector is at/above max capacity during prime time with 49 CPE’s, 30Mbps rates and a 40Mhz channel.
Question #4 I’m pretty sure RSSI / SNR and channel width will have far more affect on that 1.2 Gbps than the above design ever will. That 1.2Gps assumes you are on the dark side of the moon with absolutely no obstruction or RF Interference, 80Mhz channel width and every single CPE has absolutely perfect signal strength. Every single CPE you install with less than perfect RSSI / SNR significantly drags that 1.2Gbps down. I think in the real world that 1.2Gbps is more like 300Mbps . Our best 3000/Cambium Sector with all AC clients and all -65 or better maxes out at well under 230Mbps.
How does this set of antennas affect the operation and performance of the AP 3000?
R// It does not affect the performance of the radio at all
If the AP 3000 is capable of serving two SMs simultaneously, can it continue to serve with this set of antennas? What about MU-MIMO?
R// MU-MIMO continues to work but only with AC equipment such as force300csm or force300-25 etc.
With this antenna configuration, can the AP 3000 still support all 120 SMs per sector? There are two sectors, so how is the balance of this matter?
R// The 120 SM is by radio, not by sector, that means that you could admit the same 120 SM; now the amount in real life depends on the capacity of the AP in the air, the client’s radio, the plans, and etc, etc, etc. The number 120 is just a reference point that changes for each scenario.
How is the 1.2 Gbps capacity of the AP affected by this antenna configuration?
R// you can achieve it if your scenario is ideal, noise, interference and 80Mhz channel that I don’t use at least
If the antenna configuration is valid, does the connection order of the antenna connectors make it in the correct sequence on the AP antenna connectors?
R// Connect one horn to chain 0 and 1, connect second horn to 2 and 3.
