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Total 11 documents matching your query.

1. Topband: dynamic range (score: 1): Author: "Jim Jarvis" <jimjarvis@comcast.net>; Date: Thu, 5 Feb 2004 14:50:21 -0000; After 50 years in the business, I'm either confused or amazed by the BDR and dynamic range discussions. Maybe I've missed something? 1) What's s9? I've got references indicating 50uV or 100uV. The fr; /archives//html/Topband/2004-02/msg00070.html (8,695 bytes)
2. Re: Topband: dynamic range (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Thu, 05 Feb 2004 11:22:08 -0500; It's 50 uV into 50 Ohm load. Unloaded generator has 100 uV. 100uV plus 60dB is 100 mV. It takes 60 dB from 100 uV to 0.1 uV. I dream about it :-) My MkV can be reasonably trusted on 14 MHz from S8 to; /archives//html/Topband/2004-02/msg00074.html (7,824 bytes)
3. Re: Topband: dynamic range (score: 1): Author: John Kaufmann <john.kaufmann@verizon.net>; Date: Thu, 5 Feb 2004 11:21:37 -0500; Correction: 100 uV plus 60 dB is 100 mV, still a strong signal but a long way from 100V. Decibels (for voltages) are defined as dB = 20*log(V2/V1) Correction: 30 dB down from 100 uV is about 3 uV. Se; /archives//html/Topband/2004-02/msg00075.html (9,380 bytes)
4. Re: Topband: dynamic range (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 5 Feb 2004 12:49:35 -0500; Most of these questions about dynamic range, clicks, using a receiver to measure signals, and even relay timing are on my somewhat chaotic and disorganized web site and have been for a while. I added; /archives//html/Topband/2004-02/msg00080.html (8,138 bytes)
5. Re: Topband: dynamic range (score: 1): Author: dl2kq@t-online.de (DL2KQ); Date: Thu, 5 Feb 2004 21:10:47 +0100; I see on my 27 m GP (with BPF 1.7...2.0 MHz, on R=50 Ohm by HF-voltmeter ) 200...500 mV (evening, night). 500 mV/5 uV = 100 dB. 73! de Gary DL2KQ - EU1TT www.qsl.net/dl2kq ___________________________; /archives//html/Topband/2004-02/msg00085.html (7,263 bytes)
6. Re: Topband: dynamic range (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Thu, 05 Feb 2004 16:21:00 -0500; I've even found that S meters do not respond strictly to envelope peak voltage, or envelope average voltage (in the case of speech or other varying signals). Indication can be anywhere from peak to a; /archives//html/Topband/2004-02/msg00087.html (7,617 bytes)
7. Re: Topband: dynamic range (score: 1): Author: "Thomas Kuehl" <ac7a@earthlink.net>; Date: Thu, 5 Feb 2004 19:39:34 -0700; This brings up some questions that I have... When calibrating an S-meter for 50uV equal to S9 the signal generator should be terminated into a 50 Ohm load, for best accuracy . However, when a receive; /archives//html/Topband/2004-02/msg00094.html (9,447 bytes)
8. Re: Topband: dynamic range (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Thu, 5 Feb 2004 23:14:06 -0500; up? Not really. If you want XX volts to be applied, you'd use a voltage regulated source with no padding after the voltage sample point. Most good generators already have some pad, and appear as a 5; /archives//html/Topband/2004-02/msg00095.html (9,153 bytes)
9. RE: Topband: dynamic range (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Fri, 6 Feb 2004 00:49:53 -0500; Yes, the proper way to set up the S-meter would be to use a signal generator set to 500uV and a 20 dB inline 50 Ohm attenuator. The 20 dB pad would assure that the generator saw (very close to) 50 O; /archives//html/Topband/2004-02/msg00097.html (8,752 bytes)
10. RE: Topband: dynamic range (score: 1): Author: "Richard Karlquist" <richard@karlquist.com>; Date: Thu, 5 Feb 2004 21:57:16 -0800; Any decent signal generator will have a built in output attenuator providing a good 50 ohm source impedance. You shouldn't need to pad the output externally. The mismatch error due to the receiver i; /archives//html/Topband/2004-02/msg00098.html (9,238 bytes)
11. Re: Topband: dynamic range (score: 1): Author: "Bob Tellefsen" <n6wg@comcast.net>; Date: Fri, 6 Feb 2004 08:57:48 -0800; Thomas My take is to calibrate the Smeter at 50 uV for the band on which it matters to me at the moment. If I'm working the 160m contest, that's where I calibrate it. It only takes a few moments on a; /archives//html/Topband/2004-02/msg00114.html (8,219 bytes)

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