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LF: Re: EbNaut test transmission

from [Andy Talbot] [Permanent Link][Original]
To: [email protected], [email protected]
Subject: LF: Re: EbNaut test transmission
From: Andy Talbot <[email protected]>
Date: Tue, 17 Nov 2015 14:07:14 +0000
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Frequency accuracy is better than that, more like 137780.0000 +/- 0.2mHz
The DOCXO is staying within a part per billion now the weather has gone colder and the house temperature is governed by the central heating.  That has sort-of turned it into a triple ovenned reference

Andy  G4JNT


On 17 November 2015 at 14:04, Andy Talbot <[email protected]> wrote:
Mainly as a system test, I'm radiating an EbNaut signal.  Details are

Frequency 137780.000  +/- 1mHz  (DOCXO only for this test)
Coding 8K19A
Symbol period  0.5s   (2 symbols / sec)
Message length is 9 characters consisting of a callsign and the abbreviated name of a well-known cockatiel

Transmission is on every 10 minutes (although the message itself is just under 6 mins - there is about 4 of plain carrier)

Keying is using my soft Gaussian 10ms ramp and pleased to say there is not the slightest click or any sound from the PA or loading coil when it transitions.

The PA is set to its minimum setting  and in this wet weather the increased antenna resistance is such that that means about 200 Watts of RF,  and  probably no more than 50mW ERP

Andy  G4JNT

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