Phil23
Guru
Joined: 27 March 2016
Location: Australia
Online Status: Offline
Posts: 1038
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| Posted: 13 January 2017 at 9:47pm | IP Logged
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srnet wrote:
It sure makes tuning antennas a breeze, and for what it does its not expensive.
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So I went & dug the USB tuner up a few minutes ago & plugged it into my laptop.
2 minute exercise to install the drivers & software.
This is what I'm seeing from my HC-12's using the approximately 4" whip antenna supplied.
That spike is the master polling the slaves; (master under a metre from me)
I can just see the slaves respond; (about 8m away).
As they are interrupt driven, their response is almost instantaneous, so easily lost on the spectrometer.
Could easily address that by giving them a 200ms pause for testing purposes.
It does peak a bit higher than seen above, just hard to get a screen capture.
Maybe for testing purposes a bit of code to continuously send data would be the go.
Phil.
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Topic: HC-12 RF module antenna.....
