Just got my System Blue up and running south of Houston. In the next couple of months I will be relocating it to a remote area of west Texas in the Big Bend region. There is a definite hole in coverage out there that I hope to fill.
BIG thanks to mike6158 for the build and advice!!!
With the power switch off at the controller, when I plug in the USB power supply, all the LEDs seem to go thru test-blinking, then the Power and Mode LEDs remain on, just as they are when I turn on the power switch. The red LED on the connected E-Field pre-amp board is also always lit.
Confused -- shouldn't the power switch shut off everything?
Does someone tell me why the system graphic of my detector show always a offset of + 50/60mV from zero? Can I adjust this anywhere? In the web interface, a can`t find any adjustment for this! It`s seem any wrong value in the ADC.
Sampling per InputResolution: 12bits, Period: 666ns = 500.0kSPS, Time: 2000ns
today I installed the four digital lowpass filters. The noise floor droped from 110mV to 50mV, Which allowed me to raise the gain to 16X10 with no problem. I`m running in manual mode. I`m testing yet the best value for LPF tune, but seems to be around 50KHz. I have the LPF tuned in 25Khz and monitoring the spectrum but I can`t see advantage in relation to 50Khz. I have a lot of militar stations in VLF with very strong signals (about 75 or more dBuV) between 15KHz and 60Khz which occupy part of spectrum, but apparently without causing problems. I`m able to tune and measure this stations on my VLF receiver R&S EK070, with an R&S EH10 active antenna. I also took 4 outputs on the back panel to connect the oscilloscope.
I think the lowpass filters were a good investment, but I have to wait some more time to check the operation.
Have you, per chance, considered a map showing areas of interest?
I've just indicated my interest in a receiver (I want to put together the whole shebang), but it might (at rank 2347) be years before I'll reach the "interested" point. I can fully understand if you have an area flooded with receivers that it will prove of no further value getting another, but there is nothing on the site (that I found) to indicate whether there is value in registering interest.
If the improved voltage regulator PCB 21 is now necessary for System Blue, where does one obtain the PCB 21 board -- or does one need to build it from scratch?
Good day to all! Question about using Arduino in the project. Maybe someone has had this problem? I think that in this case the project can be more widely distributed.
