All,
I received a couple of emails regarding the size of the Hellschreiber
comparison image - the link below should make it easier to see.
http://www14.zippyshare.com/v/42533726/file.html - click on the image to
enlarge.
Tony -K2MO
On 7/29/2010 5:01 PM, Tony wrote:
All,
It's interesting to see how the various Hellschreiber modes print in the
noise. There is a noticeable difference in contrast and character
definition which is likely to affect the overall readability over HF.
The disparity seems more apparent on-air than it does under the
controlled environment of the path simulator.
The image below (see link) illustrates the different characteristics of
each mode after being subjected to the same level of white noise over a
simulated channel. This is purely a sensitivity test - it does not show
the affect of HF distortion.
Hellschreiber comparison -
http://www14.zippyshare.com/v/42533726/file.html Click image to enlarge.
Test Software: IZ8BLY's Hellscreiber
Path Simulation: White Noise -6db SNR
Tony -K2MO
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