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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Tdr\s+reading\s+with\s+dc\s+grounded\s+antenna\?\s*$/: 3 ]

Total 3 documents matching your query.

1. [TowerTalk] Tdr reading with dc grounded antenna? (score: 1): Author: WW3S <ww3s@zoominternet.net>; Date: Fri, 17 Sep 2021 09:23:43 -0400; Using a AA-230 tdr, trying to diagnose a Diamond dual band antenna prior to climbing. SWR is 4.*:1, .should the tdr see a short when it hits the antenna? Sent from my iPad ___________________________; /archives//html/Towertalk/2021-09/msg00151.html (6,562 bytes)
2. Re: [TowerTalk] Tdr reading with dc grounded antenna? (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Fri, 17 Sep 2021 13:28:21 -0700; I don't know how that unit does TDR, but many do it with a broadband sweep, then do an inverse FFT to transform frequency to time, looking for reflections, indicating issues with the feedline. Since; /archives//html/Towertalk/2021-09/msg00155.html (8,215 bytes)
3. Re: [TowerTalk] Tdr reading with dc grounded antenna? (score: 1): Author: Michael Tope <W4EF@dellroy.com>; Date: Fri, 17 Sep 2021 19:03:37 -0700; If you are trying to determine if the high VSWR problem is with the feedline or the antenna, then the TDR can help with that. If the feedline is good, the TDR should show a single strong reflection a; /archives//html/Towertalk/2021-09/msg00160.html (8,799 bytes)

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