Yes. You can't see it on the FreeDV spectrum display, as that display is
filtered and averaging. But I'm sure an oscillator or two disappears.
This particular scrambler resets itself every frame. It has a starting bit
pattern. So every modem frame starts-off with the same value, and is only
64 bits long (two codec frames). So errors may only be 80 ms in length,
before the next modem frame.
The additive scrambler for HORUS was taken out of wikipedia
[image: 1+x^{{-14}}+x^{{-15}}]
On Wed, Jun 13, 2018 at 10:37 PM glen english <g...@cortexrf.com.au> wrote:
>
> The downside of most scramblers (I dont know what is used here) is that
> you can get error propagtion in a scrambler.
>
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