An indirect frequency measurement that is, using the HB100’s own mixer …
↓↓↓ Complete description, time index and links below ↓↓↓
I wanted to measure the transmit frequency of my HB100 Doppler radar modules. Unfortunately I don’t have a 10GHz scope or spectrum analyzer. But I still had that Berkeley Nucleonics Model 865 microwave signal generator in the lab.
And so I measured the HB100’s oscillator frequency by feeding a microwave signal of a known frequency into its receive patch antenna, using its own frequency mixer to measure the frequency difference between that signal and its oscillator.
00:00 Intro – what’s the transmit frequency of my HB100?
01:48 HB100 – by the numbers from the datasheet(s)
02:20 How not to – measure the frequency
03:15 How to - measure it with a 10GHz scope or spectrum analyzer
03:55 Spectrum analyzer – has a frequency mixer at its heart
05:21 Frequency mixer – at the heart of a Doppler radar
06:49 Indirect measurement – of the frequency with a signal generator
16:30 Temperature stability – non existent
17:39 Second HB100 – frequency even more off
19:04 Results – the cold, hard numbers
21:10 Wrap-up – there’s more than one way to skin a cat
Tutorials [ Ссылка ]
HB100 Doppler Radar, Limpkin’s Amplifier and Arduino MCU – The Details (1/3) [ Ссылка ]
HB100 Doppler Radar, Limpkin’s Amplifier and Arduino MCU – The Details (2/3) [ Ссылка ]
HB100 Doppler Radar, Limpkin’s Amplifier and Arduino MCU – The Details (3/3) [ Ссылка ]
BNC Model 865 40 GHz RF / Microwave Signal Generator: Review Part 1 [ Ссылка ]
All About Circuits | Teardown Tuesday: HB100 Doppler Radar Module [ Ссылка ]
#radar #doppler #microwave #measurement #spectrumanalyzer #tutorials #tutorial #how-to #robertssmorgasbord
