Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part2

To: [email protected]
Subject: Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part2
From: Andy Talbot <[email protected]>
Date: Mon, 24 Oct 2016 21:22:32 +0100
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=wWTeMmYKLNkG5c6+qHFy6D3oFPaRnPx46D0wJtbMa+M=; b=c6bDVrkiV7F4ZFNs/6aic/x52EcOfxai4iZIVNmC5CBXYdg5//NO21ztTQlVeEa+0f moPwGin5+fa2hooIkR28DnX7tuGRs3Su7RHUOkTwzPGwHe1mkD4BwjqkvMn3JPOgGLl7 S8xDo7jmrik5wdGq0Zy+Q6HJNciJc8e6XJ2hynOmsyWKrdYfo9KtqXGp9FZXMn2c906E wfWHuqZp2PLBFF4lDvMiLpS/n4EojQUVJyPgaRicmvJNNVmD1yCc316djjq4FN0NF+ak WX9RQODS3CkjCzxhK0uMgeenm4Szo/G/XgTQnkrmocA0WcL7PL5edR9g9WFLfBv/CG7F 0AYA==
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Won't the sound card's input filter, the anti-alias filter, extend this pulse, however short it is, into something the sampling rate will always see?  So there is no need to deliberately lenghen it.  

The only real advantage to doing so, perhaps, would be to increase the pulse energy within a one sample period leading to a hight amplitude in the capture.

The 1 PPS from my HP-5061 is only 1us in width, but can still be detected on a soundcard stream at any sampling rate chosen.

Andy  G4JNT


On 24 October 2016 at 21:07, Wolfgang Büscher <[email protected]> wrote:
Hello Jim,

I still wonder why the sync pulses from the Thunderbolt E are so short - you mentioned 10 us in your email, but what is the exact pulse length ? With a slightly modified software (SL) it may be possible to use them as they are.. if they are longer than a sample from the soundcard.

73,
   Wolf DL4YHF
  (not QRV on LF+MF unfortunately..)
<Prev in Thread] Current Thread [Next in Thread>