nanog mailing list archives
Re: 60ms cross continent
From: Denys Fedoryshchenko <nuclearcat () nuclearcat com>
Date: Tue, 07 Jul 2020 07:40:10 +0300
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 () nuclearcat com> wrote:On 2020-07-07 05:04, joe mcguckin wrote:Theoretically, Starlink should be faster cross country thanterrestrialfiber. Joe McGuckin ViaNet Communications joe () via net 650-207-0372 cell 650-213-1302 office 650-969-2124 faxWhen 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.
Current thread:
- Re: 60ms cross continent joe mcguckin (Jul 06)
- Re: 60ms cross continent james jones (Jul 06)
- Re: 60ms cross continent Harry McGregor (Jul 06)
- Re: 60ms cross continent Saku Ytti (Jul 07)
- Re: 60ms cross continent j k (Jul 07)
- Re: 60ms cross continent Harry McGregor (Jul 06)
- Re: 60ms cross continent james jones (Jul 06)
- Re: 60ms cross continent Denys Fedoryshchenko (Jul 06)
- Re: 60ms cross continent Eric Kuhnke (Jul 06)
- Re: 60ms cross continent Denys Fedoryshchenko (Jul 06)
- Re: 60ms cross continent Eric Kuhnke (Jul 06)
- Re: 60ms cross continent Denys Fedoryshchenko (Jul 06)
- Re: 60ms cross continent Eric Kuhnke (Jul 07)
- Re: 60ms cross continent Mark Tinka (Jul 07)
- Re: 60ms cross continent Eric Kuhnke (Jul 07)
- Re: 60ms cross continent Mark Tinka (Jul 08)
- Re: 60ms cross continent Paul Nash (Jul 08)
- Re: 60ms cross continent Mark Tinka (Jul 08)
- Re: 60ms cross continent Denys Fedoryshchenko (Jul 08)
- Re: 60ms cross continent Mike Lyon (Jul 08)
- Re: 60ms cross continent Eric Kuhnke (Jul 06)