John: An interesting thought, but I suppose that it is unavoidable for one signal to be 90 deg down the RF slope. Perhaps this doesn't matter? Bob: Let's look...
61260
Bruce Tanner
k2bet1
Jan 30, 2012 2:58 pm
I was just inspired to Google the issue on this thread and came up with the paper at this address. It pertains to use of I/Q signals in medical imaging but...
61261
Tom
n0bs_tmoll
Jan 30, 2012 3:13 pm
Does SDR Sharp only work with Si570 equipped SoftRocks? When I try to use it with my v6.2 Lite II rx, it immediately coughs up an error saying it is not...
61262
Don Rolph
donrolph...
Jan 30, 2012 3:24 pm
I think you will find that: sin (T + PI/2 ) = cos (T) A key point that Bob Reeves made earlier is that all frequencies are shifted 90 degrees (pi/2) between...
61263
sdrsharp
Jan 30, 2012 3:40 pm
Hi, SDR# only supports hardware I own :-) I haven't tested something other than the Ensemble RX II and the FUNCube Dongle. I'm falling short in this area....
61264
Tom
n0bs_tmoll
Jan 30, 2012 3:59 pm
Thanks Youssef, It is ok, I just didn't want to spend a lot of time that would not be fruitful. The Lite II rx is the "lowest end" entry level kit that is not...
61265
Albert Gerheim
alpg49
Jan 30, 2012 4:03 pm
Getting back to the "it all depends on the PC software" part, will PSDR be able to distinguish 2 of them? ... -- Al Gerheim Adopt a Homeless Pet ...
61266
Francesco Reale
ea5hwq
Jan 30, 2012 4:08 pm
I received an email from a grup member offering a anseble SoftRock bat I lost de email please send email aghein. 73 Francis EA5HWQ...
61267
alanzfq
Jan 30, 2012 4:13 pm
... It will not see the serial numbers. So setup one. Then plug in the USB of the other, start PSDR-2 set that up. This normally works with other software, I...
61268
alanzfq
Jan 30, 2012 4:21 pm
... Tom You did not play enough. It will work. You can set the centre frequency by maually typing in the centre frequency. 73 Alan G4ZFQ...
61269
alanzfq
Jan 30, 2012 4:26 pm
I've just taken another look at Sodira http://www.dsp4swls.de/sodira/sodiraeng.html With the Ext-IO it works with Softrock-Si570. I've not tested it...
61270
Bruce Tanner
k2bet1
Jan 30, 2012 4:40 pm
Probably bypassing the need for the Si-570 would clear the errors.. beyond that place the "LO" (center frequency) for the crystal in use in the lower window,...
61271
Bruce Tanner
k2bet1
Jan 30, 2012 5:13 pm
Here is a Utube sample of the Softrock LIte II using SDRSharp software. The info is below the movie clip... I did not take time to properly calibrate the LO so...
61272
MIKE DURKIN
seth_otherpower
Jan 30, 2012 5:30 pm
Suppose the compressed audio sounding stuff was because of you tube.... To: softrock40@yahoogroups.com From: bet110@... Date: Mon, 30 Jan 2012 12:13:11...
61273
Bruce Tanner
k2bet1
Jan 30, 2012 5:37 pm
Not sure what you mean MIke. The audio quality being in little on the high pitch side may be more due to my bandpass settings, but not sure... I suspect Utube...
61274
ama_gsxr
Jan 30, 2012 5:39 pm
Hi all, I have a Ensemble II RX kit for sale. I just don't have the skills to build this. Price is $50. Thanks, Anthony NE4Z...
61275
Tom
n0bs_tmoll
Jan 30, 2012 5:50 pm
Alan, You are right - I did not play enough :-) but the problem was not the lack of center freq which I was entering. The key is to select "Other" for the...
61276
Bruce Tanner
k2bet1
Jan 30, 2012 5:57 pm
Hmmm... I made it work with via the 'Softrock,Si-570' setting but I did quite a bit of fiddling to get the frequency settings correct. I will have to give a...
61277
g8voip
Jan 30, 2012 6:01 pm
Hi Ed, Only just got in from work, so need to feed my brain before saying something totally stupid (nothin unusual there)! If you look at the SoftRock receiver...
61278
Bernie Hunt
berniehunt
Jan 30, 2012 6:06 pm
Here is an interesting article on how I & Q are actually used. It gets a bit deep at times, but is very interesting on the how it's done area. ...
61279
Bruce Tanner
k2bet1
Jan 30, 2012 6:15 pm
61280
Len Alleyne
len.alleyne
Jan 30, 2012 6:23 pm
Hi All, I dont have the skill and need someone to build me an HF Ensemble 11 RX Kit. Thanks Len VE2WKO len.alleyne@......
61281
vbifyz
Jan 30, 2012 7:01 pm
I agree with Alan, it is difficult to imagine a hardware fault that would cause 8x output from Si570. I would suggest to go ahead and finish the divider stage....
61282
w5wqq
Jan 30, 2012 7:29 pm
www.geeks.com has reconditioned Creative Labs 24! sound cards type SB0410 7.1-Channel PCI Sound Card for $12.49 with free shipping. This card works great with...
61283
Ross
zl3dc
Jan 30, 2012 7:46 pm
Thanks for the quick reponse's now on to the next stage , the op amps, Doing the 10k test I don't get anything like 3.5 v , mine only shows 2.8 volts up from...
61284
edingraham
Jan 30, 2012 10:08 pm
Let me make a statement and let's see if my new understanding is correct: Every frequency in I is in quadrature with the corresponding frequency in Q. Correct?...
61285
tonyestep
Jan 30, 2012 10:18 pm
Phase shifting may not always be so easy to wrap one's mind around, but the quad-clocking scheme is really intuitive. Here's an excellent explanation from the...
61286
Alan Hill
arhill999
Jan 30, 2012 10:22 pm
I think that you will find that I & Q only contain those frequencies that pass the filters ahead of the conversion. 73's Alan - W6ARH...
61287
Thomas Bewick
thomasbewick...
Jan 31, 2012 12:12 am
It worked, you won't get your own post to your email though. 73 Tom, N2BEW...
61288
alan_r_cam
Jan 31, 2012 1:03 am
My own $0.02 worth: In a SSB receiver, you can get audio by mixing the IF signal with an oscillator, then running thru a low pass filter. The SDR uses a...
