Søren KjærsgaardIt’s time to answer my #easterquiz: it’s a ‘sweeper’, some would call it ‘Jammer’ 🤷🏼♂️🤓
They come in all kinds of frequency bands and output power levels - be aware they may be illegal in your country. I ordered this to operate in a band covered by my #hamradio license and I have no intentions of ever transmitting into an antenna.
In short, it uses a 555 timer to generate a 100kHz ramp signal which is fed to a 400-500MHz VCO. Center frequency and bandwidth can be adjusted by two trim pots. The output signal is then amplified - that’s all there is to it 👌🏻
I fed the output through a 30dB high power attenuator, then split it to my spectrum analyzer (through another 20dB) and a detector diode to my oscilloscope.
It’s not a completely calibrated setup, but the measurements seem to agree at about 1W ‘channel power’. Not much, not very efficient, but it works just fine 🙂👍🏼
Hope you enjoyed it 😃😃
#testandmeasurement #rfengineer #rfengineering #electronics #siglent #rohdeschwarz #hamr