60ms cross continent

Tue Jul 7 04:40:10 UTC 2020

On 2020-07-07 06:48, Eric Kuhnke wrote:
> This is why adaptive coding and modulation systems exist. Also dynamic
> channel size changes and advanced computationally intensive FECs.
> 
> You don't think people working on microwave band projects above 10GHz
> with dollar figures in the hundreds of millions are unaware of basic
> rain fade and link budget methodology, do you?
> 
> On Mon, Jul 6, 2020, 8:44 PM Denys Fedoryshchenko
> <nuclearcat at nuclearcat.com> wrote:
> 
>> On 2020-07-07 05:04, joe mcguckin wrote:
>>> Theoretically, Starlink should be faster cross country than
>> terrestrial
>>> fiber.
>>> 
>>> 
>>> Joe McGuckin
>>> ViaNet Communications
>>> 
>>> joe at via.net
>>> 650-207-0372 cell
>>> 650-213-1302 office
>>> 650-969-2124 fax
>> 
>> When there is no clouds.

In my experience, all that ACM has achieved is that when link becomes 
"slow" and if it rains outside, it means that it will be down completely 
after few seconds.
Previously with CCM or DVB-S without 2, it simply disappear without 
warning.
And yes, I have and cheap and expensive Microwaves >10Ghz too.
ACM/VCM really helps if you want to live on the edge, milking each db, 
(edge of link budget, e.g. small antenna size, interference), and this 
is actually very important to increase profitability, especially in case 
of multipoint VSAT, but it is near useless against rain fade.