Rustie0125:
thanx for confirming that . so for example if the RF22 radio max output is 17-20dBs then if i transmit next the the analyzer i will see a 20 dB jump in the graph but so if it was -120 it will be -100 or around there.
You will only see a 20dB jump if you were perviously transmitting at 0dB! Theoretically, if you are transmitting at 0dBm (1mW), and connect the tx directly to the rx with a coax cable (do not do this!) you will see 0dBm on the receiver. However in real life and if you are using antennas, you will see the rx RSSI change from about -20 (the RF22 will not report RSSI higher than -20) to -100 as you move the rx away from the tx.
Rustie0125:
regarding the Antenna issue , all i really wanna test with these unit is if RF equipments is working or not. for example if i have a 433mhz remote i just want to Tx next to it and see a jump in the graph so Accuracy is not that big of a problem. what i think i would do is make a small Antenna relay board with antenna's made for 900mhz, 433mhz and 600mhz and when i switch between them the reply will latch to the correct antenna Automatically i know its not the best but i think it will be best this setup can do.are you planning on upgrading the Pc app with more functions ?
like to see if you can set a start line on the average incoming signal and the app will update the max output line at the top of the graph and under the setting just show a tab that updates the dB difference between the two lines.
That will probably work ok, but you will need to write your own code. I might add more to the PC program, but it's not really a priority. You can do your own data processing by collecting the serial data and plotting them in MS Excel or MatLab or even do it on the arduino chip.
Nandox7:
This is and excellent project!
I really want to try it out in my FPV quads.Does anyone has PCB's to sell?
Unfortunately I have no way to make them.
(well I could but I'd probably ended up sleeping in the balcony)Thanks!
Basically what Devonian said. If you want one or two boards that work right out of the box, you are better off getting the openlrs. I only have the bare pcbs.
BTW, Nigel did you get the thing working on your main PC? If your boards are working properly I'll put together some RC PPM code this weekend for you to test. I've not really been motivated to do much this past week because of the terrible weather!