Both oscillator and SDR are in perfect synchronisation so the device can keep track of phase as well as the rest of the measurements. Where the scalar analyser simply has an oscillator and a sensor, the VNA mates the oscillator with a reflectometer to measure impedance, and replaces the sensor with a software defined radio receiver. This type of analyser is refered to as a Scalar Network Analyser, and all the measuring device knows about the signal is its frequency and amplitude. So for example I was able to fire a set of frequencies at a filter in a previous Hackaday article using only a Raspberry Pi and an oscilloscope, but all I could measure was its bandwidth, I knew nothing about its impedance and the phase relationships between input and output.

If you work with radio frequencies, it’s relatively easy to measure amplitudes, but usually very difficult to take phase and impedance measurements, especially across a wide frequency range. But I’m a VNA newbie, what does a VNA do? A Quick VNA Primer The NanoVNA block diagram. My VNA is not a superlative piece of high-end instrumentation that cost the GDP of a small country, it’s the popular $50 NanoVNA that has a fairly modest frequency range and performance, but is still a functional VNA that can take useful measurements. That instrument is a Vector Network Analyser, or VNA, and it’s worth spending a while going through the basics in case anyone else is in the same position. My new experience came when I bought a piece of test equipment, and for the first time in my life didn’t have a clue how to use it. I have a good idea what it does, and I can figure out whatever its interface may be to make it do what I want it to. I probably received my first piece of test equipment – a multimeter – in the early 1980s, and since then every time I’ve received a new one, whether an oscilloscope, logic analyser, spectrum analyser or signal generator, I’ve been able to figure out how to use it. LiteVNA uses only one mixer, which allows S11 and S21 measurements through internal RF switching and can allows TDR and DTF measurements through IFFT calculations.It’s never too late in life for new experiences, but there’s a new experience I had a few weeks ago that I wasn’t expecting. In order to minimize power consumption and size,

Now you can get a portable VNA that is as small as the NanoVNA and capable of ultra-wide range measurements from 50 kHz to 6 GHz. LiteVNA builds on the widely acclaimed NanoVNA and SAA2. 5MHz-6GHz Antenna analyzer 2.8' TOUCHSCREEN SWR ANALYZER RADIO ACCESSORIES

Nanovna 6ghz