delay

What is the cheapest way to add a 250 ms delay to an analog signal that goes up to 80 MHz?

Reply to
bob
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** Easy - send it up to a geostationary satellite and back. 45,000 / 186, 000 = 0.242 mS

But YOU knew that already ;-)

........ Phil

Reply to
Phil Allison

if you can digitise it fast enough (LCD displays seem to manage signals in that ballpark) you'd need (I think) 160 megabytes of RAM to buffer 250ms worth of data with 8-bit resolution.

Given the usage pattern the scanning of addresses could be done in a way which would keep dynamic RAM refreshed, but static RAMS are availabe in apropriate sizes too.

Bye. Jasen

Reply to
jasen

Is a sampling rate of 160 million samples per second enough?

How do you know what is enough?

Jamie wrote:

Reply to
bob

there is no cheap way.. for 80 mhz, you would have to have a fast ADC unit and lots of serial memory, i mean lots of it. and then a DAC converter// or put a Sat repeater in space.

--
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
Reply to
Jamie

A quarter second seems like an awful long delay at these frequencies. Can you divulge what this is for? Maybe someone can suggest another approach.

Best regards,

Bob Masta dqatechATdaqartaDOTcom D A Q A R T A Data AcQuisition And Real-Time Analysis

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Home of DaqGen, the FREEWARE signal generator

Reply to
Bob Masta

now it all depends on what your doing with this signal ? are we simply delaying it only or are we examining the signal also ? using FFT you need a min of 2 samples to regenerate the 80 mhz later on. and also , there is the problem of resolution. the highest bit Decoder is needed if this is a complex signal ? your talking about a lot of expensive components.

--
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
Reply to
Jamie

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