Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: VLF: 8819.9 Hz in Virginia?

To: [email protected]
Subject: Re: VLF: 8819.9 Hz in Virginia?
From: wolf_dl4yhf <[email protected]>
Date: Fri, 12 Dec 2014 20:25:40 +0100
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130620 Thunderbird/17.0.7
Hello Jim,

you asked:

> Can I inspect previously captured Spectrum Lab data at higher resolution by accessing a data file, or perhaps by opening a new waterfall-display window?

Only if you logged the input ("audio") as file, *.wav or *.ogg.
From the spectra which may still reside in SL's "scroll-back" buffer it's impossible to re-calculate an FFT with more resolution because the data in that buffer are -by *default*- only amplitude spectra which cannot be converted back from short-time Fourier transforms into the time domain.

So, in short: Use SL's audio logging feature to capture the raw (or, maybe, slightly compressed) data. Can be activated as shown in the manual... from the main menu: "File".."Audio Files and Streams"..."Save input as audio file".

Then, we can do all kinds of post-processing on the time domain data.

Cheers,
  Wolf .



<Prev in Thread] Current Thread [Next in Thread>