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| To: | <rsgb_lf_group@blacksheep.org> |
|---|---|
| Subject: | Re: LF: Rugby LORAN measurement? |
| From: | "Peter Martinez" <peter.martinez@btinternet.com> |
| Date: | Tue, 11 Apr 2006 17:20:11 -0000 |
| Delivered-to: | daveyxm@gmail.com |
| References: | <200603311839550854.021DC57E@smtp.wanadoo.fr> <000601c65582$aefd8ec0$cada380a@acer5gi5q0ubzj> <8bf118410604040532gf1861f9r9dfaa0fe2d6f4be1@mail.gmail.com> <004501c657e5$b779fbf0$0300a8c0@LAPTOP> <44395583.9070200@g3ysx.org.uk> <004b01c65c09$afc51e30$0300a8c0@LAPTOP> <443A05EE.1070703@g3ysx.org.uk> <001801c65c74$4b275b30$0300a8c0@LAPTOP> <443BD7E3.6070201@usa.net> |
| Reply-to: | rsgb_lf_group@blacksheep.org |
| Sender: | owner-rsgb_lf_group@blacksheep.org |
Alberto:Yes, I think you are right. Most of the pulses are 100mS duration, and the spectrum of a 10% duty cycle pulse does have a missing 10th (20th, 30th..) harmonic. Some of the pulses are 200mS. The spectrum of a 20% duty cycle pulse has missing 5th,10th, 15th harmonics, so in both cases the 10Hz sideband is missing. Once per minute there is a 300mS pulse which will not give a complete null at 10Hz. 73 Peter G3PLX |
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