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Wolf,
Q How to configure SL as audio
frequency changer ?
say 1500 Hz to 8 KHz , or , 8100 to
8200 etc
how is the set up ? sound card > SL
, then , SL > Application ?
will SL appeared as a sound source ?
G,
Sent: Sunday, December 29, 2013 12:31 PM
Subject: Re: LF: VLF exciter / signal generation in Spectrum
Lab
Hello Markus, Stefan, and the group,
Am
29.12.2013 12:42, schrieb Markus Vester:
One channel sends a continuous uninterrupted 17.94 kHz
tone to the divider, the other channel conveys modulated Opera at an
arbitrary frequency to a VOX rectifier.
Indeed, this option is now selectable in SL by selecting
'Auxiliary output: unmodulated coherent carrier' on the digimode configuration
screen. Details at
http://www.qsl.net/dl4yhf/speclab/digiterm.htm#adv_settings
I
only checked it with ASK (amplitude shift keying) yet but it should work with
PSK too. Would be an interesting experiment to send Opera-encoded bitstreams as
binary PSK... :o) if we already had an optimized decoder for it.
The
problem with very long commands (to send blocks of data through the digimode
terminal), as noted by Stefan, has now been fixed. The string of "zeroes and
ones" can be up to 1023 characters long now.
V2.79 b9 can be downloaded
from
http://dl4yhf.ssl7.com/speclab/install_speclab.zip
Please keep a copy of your 'working' version because not all of the new
functions in SL have been properly tested yet, and there may be a couple of bugs
lurking in less frequently used subroutines.
73,
Wolf
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