Bonjour à tous. Très bonne réception à mon domicile à côté de Cannes AM. Résultats :...
331
KM6QX
qx94549
Aug 5, 2011 9:17 pm
Hello, new member here. I've been using SpecLab for almost a year, primarily to measure HF frequencies with the FMT-Nuts. This morning I read many of the...
332
Chris L
vk5sa
Aug 10, 2011 3:01 am
G'day - first post. I wish to try SpectrumLab using my Tigertronics SignaLink USB sound card/radio interface, which I currently use for PSK31 with my ICOM...
333
wolf_dl4yhf
dl4yhf
Aug 10, 2011 6:22 pm
Hi Chris, I don't have the SignaLink device myself but it was reported to work well. And, a big advantage for some applications, the sampling clock of this ...
334
sven
sm5le
Aug 11, 2011 11:09 am
Hi Wolf I intend to measure the frequency of the Schumann resonances. How do I do for the best results regarding the sampling and clock etc. I have A / D E-MU...
335
Copsne
c_o_p_s_ne
Aug 11, 2011 11:41 am
Are you doing data collection in regard to the phenomena of "the hum"? I would be intetested in knowing hum location, prevalent frequencies and a description...
336
wolf_dl4yhf
dl4yhf
Aug 11, 2011 4:04 pm
Hello Sven, I am not an expert in receiving the Schumann resonances (tried it once, on a remote location, but at home it's hopeless due to the man made noise)....
337
sven
sm5le
Aug 11, 2011 9:08 pm
OK , all understod. Do I need to download latest ver. I have V2.74 b12 ? /Sven I am experimenting with 4psc J310 in parallel (lowering noise) and MOSFT @ 18...
338
Chris L
vk5sa
Aug 11, 2011 11:34 pm
Thanks, Wolf. I will give it a try and let you know how it goes. Cheers, Chris...
339
John Stuart
qx94549
Aug 12, 2011 3:11 am
Chris, Below is an informative exchange I just had with Tigertronics. I believe all external USB soundcard A/D & D/A sample rates are sync'd to the PC USB hub...
340
wolf_dl4yhf
dl4yhf
Aug 12, 2011 11:43 am
Hi John, Thanks for forwarding this info - very interesting for me, too. Anyway there are definitely USB audio devices out there whose sampling rate is...
341
wolf_dl4yhf
dl4yhf
Aug 12, 2011 11:50 am
Hi Sven, V2.74 is rather old but it should work for this application. If it works for you, 'never change a running system'. Joking aside, there may be a new...
342
John Stuart
qx94549
Aug 13, 2011 3:27 am
Wolf, Hummm; I have two computers, and two USB soundcards, so I did some sample rate accuracy testing. I used a software tone generator set for 1,004 Hz, and a...
343
wolf_dl4yhf
dl4yhf
Aug 13, 2011 7:43 am
Hello John, What convinces me about the E-MU 0202's ADC sample rate *not* being affected by USB clock is the drift curve. This is only affected by the time the...
344
John Stuart
qx94549
Aug 14, 2011 3:52 am
Wolf, Like my Flex-1500, the M-Audio Fast Track USB soundcard uses the Texas Instruments TAS1020B USB Streaming Controller. I spent my sunny California ...
345
Edgar J Twining
tjez1
Aug 14, 2011 5:31 am
Hi Wolf, In a future version, would you include a feature to enable the SpecLab Configuration and Display Control window to stay on top? Regards Edgar Moonah,...
346
wolf_dl4yhf
dl4yhf
Aug 14, 2011 7:56 am
Hi John, I think the major difference is that the E-MU doesn't use an USB ADC and USB DAC at all. Instead, there is a USB transceiver chip (by Philips) which...
347
wolf_dl4yhf
dl4yhf
Aug 14, 2011 9:05 am
Hi Edgar, Ok, will be added for the next version. I'm already looking for the right place where to put yet another control in the overcrowded config screen ......
348
Edgar J Twining
tjez1
Aug 14, 2011 12:14 pm
Hi Wolf, Thank you for that. Could you use the mouse right click similar to the component window? That would not need another control. Regards Edgar Moonah,...
349
wolf_dl4yhf
dl4yhf
Aug 14, 2011 12:54 pm
Hi Edgar, ... Would be a bit difficult due to the tabbed control. I already managed to add a new item to the window's "system menu" which can be opened by ...
350
Edgar J Twining
tjez1
Aug 15, 2011 11:20 am
Hi Wolf, Wonderful! Works like a charm and saves a lot of mouse work when working with the screen maximized. Thank you. Regards Edgar Moonah, Tasmania....
351
ve2iq
Aug 15, 2011 1:40 pm
I don't see any need to tweak the audio sampling rate based on USB frame rate as long as there is adequate buffering on the external sound card and some kind...
352
John Stuart
qx94549
Aug 15, 2011 2:58 pm
Last night I used one of my EBay toys to actually see the sample rate tweaking. I measured the MCLK frequency modulation coming out of the USB chip used in...
353
ve2iq
Aug 15, 2011 3:47 pm
I thought of a situation that would call for sample rate tweaking (on the DAC end only)- say we had two soundcards, one recording a signal and the other...
354
space_51x
Aug 16, 2011 6:09 pm
Any people working on RDF using SL??...
355
wolf_dl4yhf
dl4yhf
Aug 21, 2011 8:02 am
Greetings everyone. A new group member wrote (in the sign-up form) : "200 characters maximum" with no further details. What do you mean, is this a bug...
356
sven
sm5le
Aug 21, 2011 5:48 pm
Wolfgang. Is there any *. USR with noise blanker on ? I find it hard to set it properly so it does not affect Schumann (noisy weak signal). What I want to...
357
peteburg@...
peteburg...
Aug 21, 2011 9:41 pm
Hello, I'm new on this board and rather new with SL. SpectrumLab is used here for sound analysis to minimize noise combined from different sources. I'm...
358
Jurgen Bartels
jurgenb2@...
Aug 21, 2011 10:02 pm
... You need C for that. But I would go another, simpler route: Write a separate windows app that reads the value of peak_f and then set the bandwith...
359
peteburg@...
peteburg...
Aug 22, 2011 5:50 am
... thanks Jurgen for your idea, I will consider this. To make my request easier I did not tell everything. I'm looking for a periodic bandpass to filter a...
