OP
Nickorossa
Registered
I would imagine the chip will just be a COB so you won't know whats really under there.
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I saw this post and decided that since I have a pretty good spectrum Analyzer on my home workbench I would look and see what I can see at 38Khz. Well after half an hour of fiddling I see nothing! Even down at -188 dBm there is no signal coming from the AI module but my Teric is picking up the signal. I am starting to wonder if this is an RF signal or is it Acoustic?
Definitely RF....that's why the transmitter has FCC approval.I saw this post and decided that since I have a pretty good spectrum Analyzer on my home workbench I would look and see what I can see at 38Khz. Well after half an hour of fiddling I see nothing! Even down at -188 dBm there is no signal coming from the AI module but my Teric is picking up the signal. I am starting to wonder if this is an RF signal or is it Acoustic?
I thought the same thing but then I did a quick look and the FCC is also involved in licensing sonar equipment, they probably have a say in anything that involves wireless communication. I can tell you one thing, this thing is not putting out an RF signal unless the frequency they state is not accurate and I doubt that is the case.Definitely RF....that's why the transmitter has FCC approval.
Cool, though suprised you got nothing at all maybe we have wrong info about the particular frequency. I think at that these near VLF frequencies it is more in the magnetic domain (near field) and need a coil to pick it up. What did you do for an antenna. I think these devices are using a tuned coil on a ferrite rod for their antenna.
It is authorized under DCD- part 15 Low Power Transmitter Below 1705 kHz. See https://fccid.io/MH8A.I thought the same thing but then I did a quick look and the FCC is also involved in licensing sonar equipment, they probably have a say in anything that involves wireless communication. I can tell you one thing, this thing is not putting out an RF signal unless the frequency they state is not accurate and I doubt that is the case.
I was not listening for the carrier I was listening for the modulation! I expected some sort of distortion sound from the pulses but heard nothing but steady static and of course no signal on the screen.It is authorized under DCD- part 15 Low Power Transmitter Below 1705 kHz. See https://fccid.io/MH8A.
One of the links goes to https://fccid.io/frequency-explorer.php?lower=0.03800000&upper=0.03800000, where the waveltngth is given. It is RF, not acoustic. Sorry you couldn't hear it.