I have a couple of them plus a cheaper Chinese version. If you are interested in viewing the 2.4 GHz ISM band, I can highly recommend the Ubiquiti Airview2. I personally would not buy this unit without first seeing it in the flesh or reading a review from a trusted source that details its true performance rather than just quoting manufacturers specs. That's how people used to use older spectrum monitors that had no calibrated amplitude.
Rigol dsa815 video generator#
To obtain true RF level readings you would need a calibrated signal generator operating in the same frequency range and use the comparative level method of level measurement. You can always build a simple downconverter for a particular area of the microwave spectrum. A poor implementation of FFT on a cheap spectrum analyser would be awful to use. Anything that used DSO type techniques involving FFT should be carefully scrutinised. MAX hold will eventually build up an 'image' of the hopper but it can take a much longer time than a YIG equipped unit. Such spectrum analysers can be fine for static carriers but spread spectrum and frequency hopping can be a challenge for them.
Rigol dsa815 video update#
The result can be very slow sweep update speeds due to the PLL lock limits and VCO settling times. Some cheaper and more portable spectrum analysers have gone down the path of swept VCO's instead of a YIG oscillator. My R4131D's use a YIG oscillator for the 1st LO and these can sweep a broad frequency range at excellent speeds to provide very fast scans of the spectrum even at 0-3500MHz spans. But they did cost GBP15K new ! I would be tempted by the Rigol for portable work but I have some 1GHz units for that so can't justify the purchase Now the bit that may not be so good. I am using 3.5GHz Advantest R4131D's as I love their design and build.
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