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LF: 503.700KHz Beacon

To: "LF -RSGB LF Group" <[email protected]>
Subject: LF: 503.700KHz Beacon
From: "Gary - G4WGT" <[email protected]>
Date: Thu, 19 Mar 2009 11:11:52 -0000
Reply-to: [email protected]
Sender: [email protected]
Thread-index: Acmog4E3/FsSl4krQeKRSMCW71ZCxQ==

Hi Andy, LF,

 

I have noticed that although I can see the beacon using SpecLab the G3PLX software seems unable to detect the signal for SNR data during the daytime.

 

In view of this I have made a small change to the way I attenuate the input to the sound card to see if it helps with daytime detection.

 

I have removed the RF attenuator at the antenna input & placed an adjustable resistive attenuator in the audio feed to the sound card input (BTW, the sound card is a simple USB dongle type & has no input gain control). I have adjusted the level to be similar to that with the antenna attenuator & monitor the daytime signals when they are present.

 

This morning I had to re-boot the PC & restart the software so I am not sure how that will effect continuity with about 15 minutes monitoring missing due to Windows & Internet security updates.

 

73,

 

Gary - G4WGT - IO83QP.

 

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