Hello,
I started using RUTX50 a couple of months ago with Iskra P-60 antennas. I am trying to find the best base station with the best combination of Stability/Bandwidth/Latency on my 4G connection.
I rigged a setup to monitor RSRP,RSRQ,SINR,RSSI, ICMP response time and loss with 3min logging interval. Have had that up and running a couple of days now. Need to do some adjustments to my mast pipe mount before I can start adjusting the bearing and height with proper accuracy to be able to return to the best adjustment later. However before starting I wanted to share my setup and thoughts, so if someone feel the need to give feedback, that is appriciated.
I have a couple base stations to try:
| BS | 4G Band | Distance [km] | Line of sight estimation |
|---|---|---|---|
| A | 20,3 | 3,6 | 40% over sea, 60 % treetops |
| B | 20,3,1 | 6,2 | 25% over sea, 60% treetop, 15 % forest on hill |
| C | 20,3,1,7 | 8,6 | 50% over sea, 50 % treetops |
| D | 20,3 | 8,0 | 90% over sea, 10% treetops |
| E | 20,3 | 11,4 | Free line of sight |
| 4G Band | Downlink | Uplink | Wavelength | WL*2 |
|---|---|---|---|---|
| b7 | 2 675 MHz | 2 555 MHz | 11,73 cm | 23,47 cm |
| b1 | 2 120 MHz | 1 930 MHz | 15,53 cm | 31,07 cm |
| b3 | 1 867,5 MHz | 1 772,5 MHz | 16,91 cm | 33,83 cm |
| b20 | 816 MHz | 857 MHz | 36,74 cm | 73,48 cm |
Before my RUTX50 I was running RUT241 with a QuSpot omni-directional antenna. I was not pleased with connection, so decided to upgrade to a more robust and futureproof setup. However with that setup I noticed that it mostly connected to cells in towers A,D,E. Even if the distance is much greater to D&E. With RUTX50 and Iskra antennas installed I have only tried D since I wanted to get my logging up and running before started tweaking.
My next step will be to rise the antenna higher and direct it towards BS A.
Currently I have the antennas mounted horizontally on one pipe mast. The first pair (Higher mount) connected to port 1&3 from the left. The second (lower mount) connected to 2&4 on my RUTX50.
According to Antenna distance in one pair of iskra P-56, I assume same goes for P-60.
If I use base station A, that uses b20,b3. I aim to make distance of higher pair suitable to b3 and lower pair according to b20. That would give x1=34cm & x2=74cm.
- Is there a preferred minimum distance y between antenna pairs?
- Is there a preferred minimum distance z from antennas to metal roof?
- Is there an preferences how to connect the pairs to RUTX50.
I intend to start with trying these combinations. If someone believe there are better ones please tell.
| RUTX50 port | Combination 1 | Combination 2 |
|---|---|---|
| 1 | b3 high antenna (pair 1) | b3 high antenna (pair 1) |
| 2 | b20 high antenna (pair 2) | b3 low antenna (pair 1) |
| 3 | b3 low antenna (pair 1) | b20 high antenna (pair 2) |
| 4 | b20 low antenna (pair 2) | b20 low antenna (pair 2) |
Regarding antenna installation I saw a thread here in the community where someone had mounted the same iskra P-60 antennas in rectangular mounting instead as vertically on one pipe. Are there any perks for this type of mounting instead of getting both pairs as high as possible?
Lastly sharing a couple of pictures of my current readings before I start moving the antennas. Of course I get one of the best results so far in speedtest now. This last 6 months it has been around 2-40 down, 15 up with ping about 70-90.
