[GreenKeys] Terminal unit (HAL ST-5000) adjustment

[Jeffrey Angus]

On 1/7/18 7:26 PM, Ethan Blanton wrote:
> Furthermore, a 'scope on the ST-5000 showed greatly unbalanced
> mark and space amplitudes, rather wide ellipses on the cross, and
> an angle between the ellipse long axes of probably 15 degrees off
> perpendicular.  The needle bounced significantly on a known good
> (i.e., generated locally on a computer with a high quality sound
> card) signal.
The wide ellipses are normal.
The unbalance is likely from not having the 2B pass band properly
centered for the two tones.
And lastly, the 15 degree offset is from people running 200 Hz
shift instead of 170 Hz.



-- 
"I am a river to my people."
Jeff-1.0
WA6FWI
www.foxsmercantile.com