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Re: LF: NA VLF

To: [email protected]
Subject: Re: LF: NA VLF
From: DK7FC <[email protected]>
Date: Tue, 23 May 2017 17:35:01 +0200
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]>
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Hi Joe,

Your first attempts to cross the pond is certainly more remarkable than my meanwhile almost daily transmissions for the VLF establishment :-) I just assumed that Paul is the only one who can receive you anyway. Also he can tune to your direction which is the back side of my direction. So i did not assume that i would lower the SNR in your experiments.
Please stay near 8270 Hz, at least with the carriers.
Maybe Paul can tell us if QSY is necessary to avoid a lowering of the decode performance.
73, Stefan


Am 23.05.2017 17:10, schrieb [email protected]:
Paul and Markus,

Thank-you for the encouragement and patience, but infortunately the message received does not match the one that was sent, assuminmg the
sending was done correctly.  Can we try again?

Hopefully I am not causing QRM to Stefan's QTC on 8270.1 Hz.  If so I can
QSY back to 8277 Hz!  Can we try his suggestion for a daytime attempt to
take advantage of the lower QRN or will the S/N be too low?

Also, are the sigs stable enough? Stefan suggested a GPS module that
could be used with Spec Lab to generate a disciplined carrier.  The WX
should be more stable now.  Last night the ERP decreased  and the phase
probably shifted too.

73
Joe VO1NA

On Tue, 23 May 2017, Markus Vester wrote:

Paul and Joe,

great news! Your patience has finally paid off. Congratulations to both on this excellent piece of work!
73,
Markus (DF6NM)

-----Ursprüngliche Mitteilung-----
Von: Paul Nicholson <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Di, 23. Mai 2017 12:07
Betreff: Re: LF: NA VLF



Overnight 22nd/23rd was fairly quiet and the decoder turned up

'VO!'

at Eb/N0 = +0.5dB, BER 42.7% with constant reference phase,
peaking at frequency of 8270.0070925 Hz + 6 uHz.

Rank 7430 in the decoder list.
Carrier S/N: 12.81 dB in 39.2 uHz,
-31.26 dB in 1Hz,
-65.24 dB in 2.5kHz

--
Paul Nicholson
--




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