No IF vs Low IF - when, why, and how?

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Jrodh13
Posts: 4
Joined: Fri Aug 26, 2016 2:14 pm

No IF vs Low IF - when, why, and how?

Postby Jrodh13 » Sun Apr 16, 2017 10:05 pm

I'm trying to understand the differences between No IF and Low IF and how they relate to a regular Intermediate Frequency for analog receivers.

Anyone have any good way of explaining it or any good books that explain it in simple terms?

I'd also like to learn when an why one or the other is used.


Thanks,
Jared
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PG3
Posts: 29
Joined: Mon Nov 14, 2016 6:04 am

Re: No IF vs Low IF - when, why, and how?

Postby PG3 » Mon Apr 17, 2017 4:56 pm

This question gets asked often and there are a lot of discussions on the net, just google it. Here is one thread that describes some of the trade-offs in simple terms...

https://www.dsprelated.com/thread/567/z ... -receivers

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Jrodh13
Posts: 4
Joined: Fri Aug 26, 2016 2:14 pm

Re: No IF vs Low IF - when, why, and how?

Postby Jrodh13 » Tue Apr 18, 2017 6:05 pm

I did some google searches, but often find them rather complicated and confusing. I'll take a lot at this link.

Any other suggestions are welcome.


Thanks,
Jared
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W9KJO
Posts: 49
Joined: Thu Oct 06, 2016 3:38 pm

Re: No IF vs Low IF - when, why, and how?

Postby W9KJO » Thu Apr 27, 2017 4:39 pm

This may seem like a stupid question but,

How and where does one set either "LO IF" or "No IF" in the newest version of SDR UNO?

I seem to be having trouble finding this setting window.

W9KJO

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W2DLC
Posts: 33
Joined: Tue Apr 04, 2017 1:51 pm

Re: No IF vs Low IF - when, why, and how?

Postby W2DLC » Thu Apr 27, 2017 5:18 pm

Go to the Main panel and click SETT. in the upper left. There, under INPUT you will find a setting for IF mode. Also, in the same settings, click the CAL tab and you can select the LO Plan Frequency.
This is from the Cookbook: http://www.nn4f.com/SDRuno-cookbook.pdf

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W9KJO
Posts: 49
Joined: Thu Oct 06, 2016 3:38 pm

Re: No IF vs Low IF - when, why, and how?

Postby W9KJO » Fri Apr 28, 2017 2:05 am

Ah that's where they put it. in 1.04 there was a separate window for the Lo If and No If settings. This new place is right there. Glad it was not a snake. LOL

When set to Lo If how lo is the if?

W9KJO

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