Re: LF: RFspace SDR-IQ

[Andy Talbot <andy.g4jnt@googlemail.com>]

Oops...

 

What I really meant was I was measuring PN of PLLs, using a crystal oscillator as LO in  downconverters.   

Typing got ahead of thoughts :-)

 

Andy
www.g4jnt.com

On 30 October 2010 11:39, Clemens Paul <cpaul@gmx.net> wrote:

I believe when you are measuring decent crystal oscillators

with e.g. the SDR-IQ you can not be sure if you meaure its own phase noise

(of the clock oscillator) or that of the DUT.

Indeed one can use *very clean* OCXOs to measure the SDR's phase noise.

I've done this with my Perseus using a Wenzel OCXO

(probably the same that Peter Hart uses).

 

73
Clemens
DL4RAJ 

----- Original Message -----

From: Andy Talbot

To: rsgb_lf_group@blacksheep.org

Sent: Friday, October 29, 2010 8:58 PM

Subject: Re: LF: RFspace SDR-IQ

Lovely receiver. 

 

And just as useful as a piece of test equipment too - I use mine for phase noise measurements of crystal oscillators / PLLs when its not receiving LF - HF signals

 

Only downside is that it only shows 190kHz spectrum in one go.

 

Andy
www.g4jnt.com

On 29 October 2010 16:50, Tony <ei8jk@o2.ie> wrote:

Hello group.

Has anyone any experience with this SDR ?
It looks interesting and I'm a bit tempted, especially as it works full spec down to 500 Hz and "usable" to 100 Hz.
But as I have never used an SDR, I haven't got a clue if it's any good or not.

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