Electronics > RF, Microwave, Ham Radio

SDR - various uses including spectrum analyzer

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uncle_bob:
Hi

As mentioned above, the RTL has some interesting spur and image issues when run with the normal spectrum analyzer code.

Bob

cdev:
Quote from: uncle_bob on Today at 20:06:06Quote from: cdev on Today at 20:01:58
I wonder, has anybody successfully modded an RTLSDR to extract the tunable local oscillator signal to use in something else?

Maybe another, "better" SDR?

--- End quote ---

Hi

Does the oscillator even show up on a pin?

Bob
--- End quote ---


Hmmm..

This looks promising..

http://www.steila.com/blog/index.php?controller=post&action=view&id_post=9 - description which links to

http://www.g8jnj.net/softwaredefinedradio.htm

uncle_bob:

--- Quote from: cdev on February 09, 2016, 05:04:17 am ---

Hmmm..

This looks promising..

http://www.steila.com/blog/index.php?controller=post&action=view&id_post=9 - description which links to

http://www.g8jnj.net/softwaredefinedradio.htm

--- End quote ---

Hi

For even wider range outputs, there are a bunch of AD and TI (ex National) PLL chips with built in VCO's. They are not particularly expensive and you have a massive amount of documentation on them. The ADF 5355 came up in another thread here yesterday

http://www.analog.com/en/products/rf-microwave/pll-synth/adf5355.html#product-overview

Yes indeed AD is proud of their products. You could buy several RTL dongles for the price of one chip. The AD chips work. The National chips are less expensive, they may do what you need to do.

Bob

cdev:
Checking out those AD chips is definitely on my "to do" list.

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