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Total 48 documents matching your query.

41. Re: [TenTec] Scads of used Icom IC-7300 (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Sun, 11 Sep 2016 13:49:38 +0200
A perfect 16-bit ADC would have a difference of 97.8 dB between the average noise level and the level of the full-scale sinusoid. This is a basic fact, and it is NOT violated by ADCs used in SDR rece
/archives//html/TenTec/2016-09/msg00153.html (10,386 bytes)

42. Re: [TenTec] Scads of used Icom IC-7300 (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Mon, 12 Sep 2016 00:06:11 +0200
As long as the quantization noise is not correlated with the signal, ADC will successfully convert signals much, much smaller than the quantization step. The noise effectively interpolates ADC steps
/archives//html/TenTec/2016-09/msg00179.html (11,136 bytes)

43. Re: [TenTec] Scads of used Icom IC-7300 (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Mon, 12 Sep 2016 00:59:18 +0200
Yes, it is. Yes, that's the essence of it. 73, Sinisa YT1NT, VE3EA _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listin
/archives//html/TenTec/2016-09/msg00188.html (10,116 bytes)

44. Re: [TenTec] OT: Dynamic range of SDR Radios with 16-bit DAC (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Mon, 12 Sep 2016 01:21:54 +0200
That is another matter. Dithering removes nonlinear effects of ADC steps, but it does not remove other forms of nonlinearities. Due to ADC nonlinearities (other than quantization steps), some distort
/archives//html/TenTec/2016-09/msg00190.html (9,568 bytes)

45. Re: [TenTec] Scads of used Icom IC-7300 (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Mon, 12 Sep 2016 23:51:00 +0200
Filters like those have trouble in achieving 40 dB attenuation in the next/previous ham band. At +/- 750 kHz (or +/- 1.5 MHz) attenuation is practically non-existing. 73, Sinisa YT1NT, VE3EA _______
/archives//html/TenTec/2016-09/msg00209.html (8,738 bytes)

46. Re: [TenTec] Scads of used Icom IC-7300 (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Tue, 13 Sep 2016 10:15:04 +0200
Hi Rick, that's what I had in mind. Taking the 7 MHz filter as an example, there is 40 dB attenuation on ~3.5 MHz. But on 6 MHz the attenuation is practically nil. Your preselector is the right tool
/archives//html/TenTec/2016-09/msg00213.html (9,418 bytes)

47. Re: [TenTec] Scads of used Icom IC-7300 (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Tue, 13 Sep 2016 10:17:29 +0200
Hi Rick, that's what I had in mind. Taking the 7 MHz filter as an example, there is 40 dB attenuation on ~3.5 MHz. But on 6 MHz the attenuation is practically nil. Your preselector is the right tool
/archives//html/TenTec/2016-09/msg00214.html (9,077 bytes)

48. Re: [TenTec] Preselector, was: Re: Scads of used Icom IC-7300 (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Thu, 15 Sep 2016 22:41:49 +0200
Only about 10 dB of attenuation 1 MHz away from the tuned frequency. Not exactly brilliant. 73, Sinisa YT1NT, VE3EA _______________________________________________ TenTec mailing list TenTec@contesti
/archives//html/TenTec/2016-09/msg00253.html (8,400 bytes)


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