Thanks for the testing Tony. We observe Doppler shifts of as much as 100
Hz and Doppler spreads around 50 Hz or greater. On SSB phone, a S3
signal will not be intelligible and you can hear the voice pitch go down
in a fluttering manner. ROS definitely produces nothing but garbage when
SSB
Tony,
Our on-air tests show that ROS 16 baud, 2200 Hz wide spread spectrum was
very poor on UHF under Doppler spreading. Can you confirm this with
flutter tests like Jaak has done on
http://contestia.blogspot.com/p/pathsim_09.html ?
73, Skip KH6TY
On 7/19/2010 9:42 PM, Tony wrote:
All,
On 7/20/2010 3:54 PM, KH6TY wrote:
Our on-air tests show that ROS 16 baud, 2200 Hz wide spread spectrum
was very poor on UHF under Doppler spreading. Can you confirm this with
flutter tests like Jaak has done.
Skip,
My path tests show that ROS is less tolerant to Doppler spread than
Olivia
All,
With all the attention ROS has been getting lately, I thought it would
be interesting to see how the narrow mode compared to the wide version
under the controlled environment of the HF path simulator. After a few
hours of testing, it seems there's little difference between the two.
The
