Search found 206 matches

by SteveAndrew
Thu Apr 04, 2019 11:08 am
Forum: Spectrum Analysis
Topic: AD9851 Tracking Generator board/schematics?
Replies: 3
Views: 2967

Re: AD9851 Tracking Generator board/schematics?

Hi. I too am late coming into the discussion for the tracking generator, like the first author. Again, is there some information on how to connect the AD9951 board or similar, with an Arduino board and subsequent control by a PC? I gather that the AD9951 is quite suited to doing frequency sweeps, u...
by SteveAndrew
Thu Apr 04, 2019 11:05 am
Forum: Spectrum Analysis
Topic: Tracking generator info
Replies: 2
Views: 1194

Re: Tracking generator info

I have been reading many posts on the tracking generator, but never a post giving a list of available info to build one and where to get the Arduino software. Can someone provide COMPLETE info? This could be very useful! Hi As per the manual :D The Trackgen firmware HEX files can be found in the an...
by SteveAndrew
Thu Apr 04, 2019 5:38 am
Forum: Spectrum Analysis
Topic: RSP SPECTRUM ANALISER VER. 0.9 Vs. VER. 1.0
Replies: 11
Views: 2938

Re: RSP SPECTRUM ANALISER VER. 0.9 Vs. VER. 1.0

Hi Steve, Here below some general findings. Please forgive me if I did something wrong, but one must try to get acquainetd with this new machine, after all... 1) In the tested range 0.5 to 15 MHz the system seems to saturate at - 44 dBm, so care should be taken to keep input signals always below th...
by SteveAndrew
Thu Apr 04, 2019 5:28 am
Forum: Spectrum Analysis
Topic: Feedback for version 1.0a here
Replies: 100
Views: 23191

Re: Feedback for version 1.0a here

Hi Steve, Yes, that particular peak at 103.85MHz @ -30dBm reference was the aspect that set me off thinking that something was wrong and some more complicated interaction was going on. In a way, I feel comforted that the peak at 103.85MHz is not expected behavior (by you at any rate), and I will tr...
by SteveAndrew
Thu Apr 04, 2019 4:04 am
Forum: Spectrum Analysis
Topic: dBm accuracy
Replies: 4
Views: 1424

Re: dBm accuracy

What is the accuracy of the dBm measuring within the SA? Is this the best accuracy I will get from this? I think this is a fantastic piece of software, but maybe I'm looking for higher accuracy than this will provide. Hi HNRAO There will a small difference in gain levels between radios due to a var...
by SteveAndrew
Thu Apr 04, 2019 3:50 am
Forum: Spectrum Analysis
Topic: AD9850-ARDUINO Interconnect
Replies: 16
Views: 2940

Re: AD9850-ARDUINO Interconnect

Breadboarding AD9850 and ARDUINO Nano for a Tracking Gen, SW compiled in Nano and returned responses are good. Interconnect pin numbers returned but uncertain of what the "S" Sync connection is on the AD9850 module, this is the connection to the Nano D8 pin. Please advise or correct me if...
by SteveAndrew
Tue Apr 02, 2019 10:51 pm
Forum: Spectrum Analysis
Topic: Feedback for version 1.0a here
Replies: 100
Views: 23191

Re: Feedback for version 1.0a here

I had attached the plots (or so `I was told...) I will try reattaching them in two submissions this time. It is not so much the noise floor that increases, but the shape of the curves as well, especially around marker 'C'. Many thanks, Mike. Hi Mike Regarding the noise floor, the plots are as I wou...
by SteveAndrew
Tue Apr 02, 2019 10:41 pm
Forum: Spectrum Analysis
Topic: RSP SPECTRUM ANALISER VER. 0.9 Vs. VER. 1.0
Replies: 11
Views: 2938

Re: RSP SPECTRUM ANALISER VER. 0.9 Vs. VER. 1.0

Hi Steve, My apologies. I managed to go down to 100 KHz and so far so good. My problem was I could not and cannot see the zero: the system manipulates the frequencies so that zero is forever hidden. But I am still learning... Hi Gianfranco I'll check the code, I think there is a minimum frequency t...
by SteveAndrew
Tue Apr 02, 2019 9:02 am
Forum: Spectrum Analysis
Topic: FILTER DEVELOPMENT WITH NEW VER. 1.0a SPECTRUM ANALYSER SOFTWARE
Replies: 4
Views: 1695

Re: FILTER DEVELOPMENT WITH NEW VER. 1.0a SPECTRUM ANALYSER SOFTWARE

THREE SECTION/TWO STUB COAXIAL LINE BANDSTOP FILTER FOR FM BROADCAST BAND SUPPRESSION - CLOSEUP DATA Hi Glovisol Very nice screen-shots, great to see the analyser being put to good use. Looking at your screen-shots, it looks as if you might be running under Vista. I've just installed the analyser o...
by SteveAndrew
Tue Apr 02, 2019 8:39 am
Forum: Spectrum Analysis
Topic: RSP SPECTRUM ANALISER VER. 0.9 Vs. VER. 1.0
Replies: 11
Views: 2938

Re: RSP SPECTRUM ANALISER VER. 0.9 Vs. VER. 1.0

USING BOTH VERSIONS TO BEST ADVANTAGE It seems to me that Ver. 1.0 does not supersede Ver. 0.9, but supplements it for the wider span ranges. The main point is that (unless I am mistaken as such early stage!) Ver. 1.0 does not see down to zero frequency, while Ver. 0.9 does quite well. So for low f...

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