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Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: Bill Sloman <bill.sloman@ieee.org>
Newsgroups: sci.electronics.design
Subject: Re: Fast sampler
Date: Mon, 10 Mar 2025 13:38:23 +1100
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On 10/03/2025 10:22 am, Tom Del Rosso wrote:
> Phil Hobbs wrote:
>> Hi, All,
>>
>> Late last year we did a fast sampler/TDR with nice clean 60 ps edges.
>>
>> We're gearing up to actually sell them, so I did a short technical
>> writeup on the design, which may be of interest.
>>
>> <https://electrooptical.net/News/a-high-performance-time-domain-reflectometer>
>>
>> Cheers
>>
>> Phil Hobbs
> 
> Why is a LASER ruler that can measure distances in air with 2mm accuracy
> $16,
> 
> and an OTDR for measuring fiber $600?

Air is a rather less complex transmission medium than optical fibre, but 
the most likely explanation is that you can sell a lot more laser rulers 
than you can sell tools for measuring optical fibres, so you can afford 
the masks for an ASIC for the former, but not the latter.

Cunning designers have been known to use ASICs in applications for which 
they weren't designed, but if the application is too specific, it won't 
work.

-- 
Bill Sloman, Sydney