Thanks for the replies guys – I’ll have a closer look at the schematics I just downloaded and see if I can do this without getting to close to the possibly delicate A/D itself .
Ian From: kd5wdq . [mailto:[email protected]] Sent: 14 September 2014 21:22 To: Ian Davidson Cc: [email protected] Subject: Re: [Hackrf-dev] Input from Photodiode Interesting idea Ivan, Should be doable, there's a video on getting directly to the A/D and D/A converters on the board, which is (i think) what your trying to do. --ek (af5sa) On Sun, Sep 14, 2014 at 2:44 PM, Ian Davidson <[email protected]<mailto:[email protected]>> wrote: An unusual request here, HackRF folks. I'm looking at the possibility of using HackRF and SDR# (or similar) to detect the beating of two lasers on a fast photodiode. I know the frequencies of light and RF are several orders of magnitude different but if the lasers (or cavities) are any good (near single mode, stable etc) then you *do* get a heterodyne beat (Google 'laser heterodyne spectroscopy' if you are keen). My question is - can anyone on the forum offer me any thoughts on the best way to interface a Photodiode to the HAckRF input? Many Thanks Ian _______________________________________________ HackRF-dev mailing list [email protected]<mailto:[email protected]> http://nine.pairlist.net/mailman/listinfo/hackrf-dev
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