Path: ...!Xl.tags.giganews.com!local-2.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail
NNTP-Posting-Date: Sun, 23 Jun 2024 17:33:44 +0000
From: john larkin <jl@650pot.com>
Newsgroups: sci.electronics.design
Subject: Re: Schematic Symbols
Date: Sun, 23 Jun 2024 10:33:45 -0700
Message-ID: <bsmg7jdu3ju14kan51rsgkpvjth50d3jbr@4ax.com>
References: <v59juo$e196$2@dont-email.me>
User-Agent: ForteAgent/8.00.32.1272
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Lines: 47
X-Trace: sv3-EN9j38+HXgrchNd4rTlWWcLzXh/+P8acP1Ri7x/lLt07k9xOAwt0hckTgz5tvip3ONVsPzmdnwjixBP!B3VjWPBKXUtrnBVInrP5Q426IM9WZ+/TZg1JcRgZHeBzK/CO5i7MevCvHHm52q36FXLNrwbtCunK!iNRSoA==
X-Complaints-To: www.supernews.com/docs/abuse.html
X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly
X-Postfilter: 1.3.40
Bytes: 2444

On Sun, 23 Jun 2024 16:53:44 -0000 (UTC), Cursitor Doom
<cd999666@notformail.com> wrote:

>Okay, let's see if anyone can disabuse me of my ignorance on this 
>matter...
>In the HP service manuals for their equipment they use a few different 
>symbols in their block diagrams I'm not familiar with. I can't post images 
>right now but hopefully a description will suffice.
>
>The first one is a circle with a Greek capital sigma inside it. What's 
>that all about? Is it an integrator? A summing amplifier? What's the deal 
>here?

Summer, adder. Might just be two resistors in real life. Check the
real schematic.


>Next up: a circle with a greek theta over 'f' implying some sort of 
>division. Is that a phase to frequency comparitor?
>A circle with a single cycle of sine wave inside it: oscillator?

Probably. Some sort of sine source.

>Plane triangles with nothing inside them. Do they represent generic 
>amplifiers or buffers?
>A circle with just a plane theta inside it. Any ideas?

Phase shifter?


>A circle divided into 4 equal slices like it's got a giant 'X' inside it.

Multiplier. Two inputs and one output?

>As per the previous one, but inside a square box.
>A circle with a capital 'S' inside it.

Stop sign.


>A square box with two double-headed arrows inside it in a 'X' arrangement.
>
>That just about covers it. Any assistance would be most welcome!
>
>Your pal,
>
>CD