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Total 8 documents matching your query.

1. RE: [TenTec] TXCO unit [OT] (score: 1): Author: Martin Ewing <martin@aa6e.net>; Date: Thu, 4 Nov 2004 07:39:32 -0800 (PST); John, In a way, it's simple. That's what a frequency synthesizer does. You take a 10 MHz reference, divide it down and/or multiply it up by various ratios, mix and filter, etc. Doing it well and chea; /archives//html/TenTec/2004-11/msg00115.html (9,196 bytes)
2. RE: [TenTec] TXCO unit [OT] (score: 1): Author: "ron" <roncasa@verizon.net>; Date: Thu, 4 Nov 2004 11:44:13 -0500; You know, I never really thought abt the TXCO until I got the Argo V. Prior to that, whenever I did psk, I kept having trouble staying on signal (slight drift). I kept thinking why isn't the software; /archives//html/TenTec/2004-11/msg00116.html (8,167 bytes)
3. RE: [TenTec] TXCO unit [OT] (score: 1): Author: David McClafferty <ve1adh@yahoo.ca>; Date: Thu, 4 Nov 2004 11:45:17 -0500 (EST); But why would you want to do it? Changing to a PLL will increase the phase noise. ______________________________________________________________________ Post your free ad now! http://personals.yahoo.; /archives//html/TenTec/2004-11/msg00117.html (10,607 bytes)
4. RE: [TenTec] TXCO unit [OT] (score: 1): Author: "John Clifford" <johnclif@ix.netcom.com>; Date: Fri, 5 Nov 2004 11:31:36 -0800; Are you saying that having PLL control over the BFO xtals would increase phase noise? How? - jgc John Clifford KD7KGX Elecraft K2 #1678 /KSB2/KIO2/KBT2/KAT2/KNB2/KAF2/KPA100 Ten-Tec Omni VI/Opt1, Ce; /archives//html/TenTec/2004-11/msg00128.html (8,103 bytes)
5. RE: [TenTec] TXCO unit [OT] (score: 1): Author: David McClafferty <ve1adh@yahoo.ca>; Date: Fri, 5 Nov 2004 15:15:16 -0500 (EST); I am only going by what I have experienced and read, PLL's produce more phase noise than xtals oscillators. Dave, VE1ADH ______________________________________________________________________ Post yo; /archives//html/TenTec/2004-11/msg00129.html (9,358 bytes)
6. RE: [TenTec] TXCO unit [OT] (score: 1): Author: Martin Ewing <martin@aa6e.net>; Date: Fri, 5 Nov 2004 12:55:48 -0800 (PST); Cheap PLLs, yes. A lot depends on the quality of the controlled oscillator. You can use a PLL to steer a crystal oscillator (oh so gently), and get minimal phase noise. Effectively, the crystal filte; /archives//html/TenTec/2004-11/msg00131.html (10,092 bytes)
7. RE: [TenTec] TXCO unit [OT] (score: 1): Author: "Robert Meuser" <robertm@broadcast.net>; Date: Fri, 5 Nov 2004 16:25:00 -0500; Phase noise in PLLs is impacted by the VCO as was stated and also impart by it's sensitivity, the number of millivolts per kilohertz of frequency change. The other major factors include loop filter a; /archives//html/TenTec/2004-11/msg00132.html (11,504 bytes)
8. RE: [TenTec] TXCO unit [OT] (score: 1): Author: "John Clifford" <johnclif@ix.netcom.com>; Date: Fri, 5 Nov 2004 17:13:15 -0800; Well, we're talking about steering crystal oscillators which are being pulled by trim capacitors anyway. I don't understand how having the 'pull' controlled by a PPL would add much noise to the syste; /archives//html/TenTec/2004-11/msg00133.html (11,494 bytes)

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