Liberty
join:2005-06-12
Tucson, AZ | reply to rotomike
Re: Skew or no skew
I have a SuperBuddy meter which gives db values to 2 decimals
I can skew the dish every which way and receive value doesn't change
Try this, run STV 5 times in a row without touching dish
I bet you get 3 or more different values |
|
grohgreg
Dunno. Ask The Chief
join:2001-07-05
Dawson Springs, KY
edit:
May 4th, @12:28AM
| said by Liberty  :I have a SuperBuddy meter which gives db values to 2 decimals I can skew the dish every which way and receive value doesn't change Relative to SKEW, signal strength in dB means nothing. You know full well that this is a digital signal. BER will remain usable over a WIDE range of signal levels. If Az and El are accurate in the first place, SKEW should have no effect on signal strength. SKEW is an adjustment designed to compensate for the fact that the satellite antennas (the ones in orbit) are essentially fixed.
They are fixed, because of the fact they have to serve multiple customer locations some 22,300 some miles below. It would be nice if the satellite would point directly AT you and you alone. But we don't enjoy that luxury, and should adjust our dishes to compensate. Of those adjustments, the SKEW angle compensates for the longitudinal difference (as adjusted by latitude) between the customer dish and the satellite. It has to do with antenna-to-antenna alignment relative to the orbital arc. Granted, there are conditions where the SKEW angle may not contribute to enhanced performance or survivability. But a few open-mined installers have discovered (and reported) that fine tuning SKEW has corrected otherwise undefined connection issues.
See the discussion at »www.wildblue.cc/wbforums/showthr···p?t=1019
//greg//
--
HN7000S/74cm/1w/ProPlus - G16/1250H/Germantown - NAT 66.82.187.152/Gateway 66.82.25.10/DNS 66.82.4.12 and 66.82.4.8 - Firefox - AVG+Firewall v7.5 |
|
rotomike
join:2006-04-15
| reply to Liberty
All I know is that DN skews all there dishes here in Maine now and is mandatory for installers and the report from Dish is that they have much less problems with the dishes skewd. And i believe it.
Mike
--
920 Pentium D dual core with VIIV, 2 gigs pc4200 ram, 250 gig HD, Xp media, DW7000 pro plan, IA6(1046) 93 West, signal 63 ACP 97 |
|
blacksheep
Aka Satguy
join:2005-09-13
Georgetown, CA | reply to grohgreg
Greg, as you know I still concur with you hypothesis. Skew can be important even with circular polarization for the very reasons you've stated. |
|
