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Path: ...!news.nobody.at!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Cursitor Doom <cd999666@notformail.com> Newsgroups: sci.electronics.design Subject: "Sampler??" Date: Sun, 28 Jul 2024 17:31:52 -0000 (UTC) Organization: A noiseless patient Spider Lines: 16 Message-ID: <v85va8$19le$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Injection-Date: Sun, 28 Jul 2024 19:31:52 +0200 (CEST) Injection-Info: dont-email.me; posting-host="c24649d98c6703fa4e7314d5d5dd6ec9"; logging-data="42670"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/+1DEMSlDjRn4EC71r36fNEMQE/hQAgAI=" User-Agent: Pan/0.149 (Bellevue; 4c157ba) Cancel-Lock: sha1:ADymLLZYCD2gSBfXdnWDfBV8gDA= Bytes: 1653 Gentlemen, I'm in the process of trying to track down a fault in my main HP spectrum analyzer. I've narrowed the issue down to the area of this "sampler" which is part of a phase locked loop. I'm not sure I fully understand its function, however. In particular, I'm extremely confused as to why they're calling it a "sampler" because when that term arises, I typically think of something doing akin to what a sampling oscilloscope does: noting voltage levels at predetermined intervals. AFAICS, this "sampler" is doing no such thing. It's just a harmonic mixer, surely? If not, I must be nuts. YOU get to decide! Block diagram here: https://disk.yandex.com/i/YXcGssgDXwVEbg Short functional description here: https://disk.yandex.com/i/k7YTYTGjHltsGw