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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Phase\s+shifts\s+on\s+137\.777\s+kHz\s*$/: 10 ]

Total 10 documents matching your query.

1. LF: Phase shifts on 137.777 kHz (score: 1)
Author: [email protected]
Date: Sat, 21 Nov 2015 17:13:51 -0330 (NST)
Dear Group, Hopefully I've finally got it right... Inversions every 50 seconds a dozen times then 100s of silence. Hopefully QRV on EbNaut in the near future. I have a long list of 1s and 0's loaded
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00494.html (10,434 bytes)

2. Re: LF: Phase shifts on 137.777 kHz (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Sat, 21 Nov 2015 21:36:57 +0000
I'll look out for your signal Joe, although that's a complicated pattern to look for unless we know just when you start your sequence. But if someone gets a strong enough signal it should be a clear
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00496.html (11,544 bytes)

3. Re: LF: Phase shifts on 137.777 kHz (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Sat, 21 Nov 2015 21:47:17 +0000
I just looked again at 137.777 and am getting a strong signal with clear phase reversals: In 10 second measurements UT phase 2015-11-21_21:32:10 122.0 2015-11-21_21:32:20 40.1 2015-11-21_21:32:30 85.
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00497.html (11,620 bytes)

4. Re: LF: Phase shifts on 137.777 kHz (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Sat, 21 Nov 2015 21:56:04 +0000
I can't do a long average because of the complicated pattern, but a 40 second sample shows 15dB in 0.025 Hz. That means you can use 1 second symbols 8K19A 13 characters. message length 896 seconds =
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00498.html (10,864 bytes)

5. Re: LF: Phase shifts on 137.777 kHz (score: 1)
Author: Markus Vester <[email protected]>
Date: Sat, 21 Nov 2015 16:57:23 -0500
Hi Joe, phase shift is working - two peaks at +- 10 mHz, as expected. Updating spectrogram: https://dl.dropboxusercontent.com/u/26404526/EbNaut_spectrogram.png Yes the start of the message and the bi
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00499.html (14,232 bytes)

6. Re: LF: Phase shifts on 137.777 kHz (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Sat, 21 Nov 2015 22:24:00 +0000
The sidebands are coming through well here http://abelian.org/vlf/tmp/151121c.gif -- Paul Nicholson --
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00500.html (10,387 bytes)

7. Re: LF: Phase shifts on 137.777 kHz (score: 1)
Author: "Markus Vester" <[email protected]>
Date: Sun, 22 Nov 2015 00:47:50 +0100
Yes your signal is really good now! Not exactly "audible" here but easily visible in Stefan's QRSS-10 slot, and sometimes faintly discernible in my wideband colour-DF in 0.67 Hz FFT bins. The QRM has
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00504.html (13,448 bytes)

8. Re: LF: Phase shifts on 137.777 kHz (score: 1)
Author: [email protected]
Date: Sat, 21 Nov 2015 21:02:28 -0330 (NST)
Hi Markus, You and your cat are up late! Unfortunately after a day in the woods with the new aerial, my energy is low and my propensity for error is high so it is perphaps best that I code the EbNaut
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00505.html (12,206 bytes)

9. Re: LF: Phase shifts on 137.777 kHz (score: 1)
Author: "Markus Vester" <[email protected]>
Date: Mon, 23 Nov 2015 22:05:44 +0100
I found a way to seamlessly stitch together data chunks from a sequence of partially-overlapping exported FFT's, allowing me to analyze phase evolution over arbitrary periods of time. Attached plot i
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00532.html (15,824 bytes)

10. Re: LF: Phase shifts on 137.777 kHz (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Mon, 23 Nov 2015 21:36:33 +0000
Also needed a -0.16 mHz offset here to straighten out the phase plot. http://abelian.org/vlf/tmp/151123a.gif -- Paul Nicholson --
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-11/msg00533.html (10,272 bytes)


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