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, C
AH, forgot that note only gave the results, and didn't include any explanation of the findings... Perhaps the contents of this email should be added to it The complete unpredictability - far more
Hello Andy, your test results show quite strong differencies between the upper and lower IM3 product,up to 18dB. Unsymmetrical IM3 products *always* imply that there is more than one IM3 producing so
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
Hello Andy, I read something related to your discussion here: http://www.sm5bsz.com/dynrange/qex/digital-imd.pdf Best regards Daniele From: Andy Talbot <[email protected]> To: rsgb_lf_group@b
Hi Alan, you seem to impute that there are no shortcommings in direct sampling! :-)) Not at all,I just meant to emphasize the difference between the two common SDR architectures,i.e.between the direc
http://www.g4jnt.com/SDRIQ_Linearity.pdf Showing some of the minor peculiarities of DS SDRs Andy www.g4jnt.com On 30 October 2010 18:04, Alan Melia <[email protected]> wrote: Hi Clemens, yo
Hello Clemens, At the moment I am playing with the RX LF Ensemble. It is an amazing kit. Lying unscreened on my desk between my keyboard and monitor it is an awesome performer at LF and lower HF. I u
Hello Tony! I am using SDR-IQ (RF Space company) for receiving on freq 5-30kHz and I can say, it works very well. I have never tried it on 500Hz, so I can´t answer your question. But I like this rece
Tony, the most important difference between SDR-IQ/-IP(from RF Space) or Perseus and the $200 SDR on http://www.lazydogengineering.com/LD-1A_SDR.html is that the latter is no direct sampling receiver
Hi Clemens. Sorry yes, it is the RF Space SDR-IQ that I am going to order. It was Graham, G8FZK that was asking about the $200 one. 73, Tony, EI8JK. the most important difference between SDR-IQ/-IP(f
Hi Andy, Clemens .....see a couple of articles by the Ed of QEX in an issue in the last 12 months about this topic. Alan AH, forgot that note only gave the results, and didn't include any explanation
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
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
Thanks guys. You have just tipped the balance for me and I shall be placing an order for one on Monday morning. It's about time I joined the 21st century, but it will be interesting to compare it to
Hi Clemens, you seem to impute that there are no shortcommings in direct sampling! right about the units mentioned, but it is just as easy to make a poorly preforming DSP radio as to make a poor anal
Thanks Lubos I have been thinking about getting an SDR for a while now and this one seems to be just right for all the things I want to do ... from LF RX to radio astronomy. I just wondered if it wa
Tony pisze: 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 ne
