I think it is worth jumping in here to mention that: 1) FCC Part 15.249 limits for 24 GHz PTP equipment are not based on EIRP, but rather field strength at 3 meters. There is a difference. 2) Trango StrataLink 24 was FCC certified with a 3 foot dish (+44.5 dBi) with the output power set to -3 dBm.
Chris Gustaf Trango Engineering On Thu, Oct 15, 2015 at 3:00 PM, Eric Kuhnke <[email protected]> wrote: > I don't think you can use a 3' antenna with the stratalink24 in FCC land > due to total eirp limits... Just Canada or other places. > On Oct 15, 2015 2:12 PM, "Adam Moffett" <[email protected]> wrote: > >> Sync is a good feature, but personally, given the low EIRP limit at 24ghz >> I think the option for higher antenna gain is a bigger deal. I also >> suspect that high perf dishes would allow for channel re-use without sync. >> >> I really can't do 24ghz more than 3 miles in any case, so it's pretty >> rare that we're using any of these things to start with. So I don't have >> as much experience with that as some of you do, and maybe my opinion is not >> well informed. >> >> On 10/15/2015 4:34 PM, George Skorup wrote: >> >> Exalt is also doing their ExtendAir G2 in 24GHz U/L now. Which is >> probably about the same pricing as the Stratalink, although ~half the speed >> being that it's only 256QAM. Neither of these seem reasonable to me when >> the AF24 exists. Yeah, the AF24 uses the whole 200MHz, but at least you can >> sync them. >> >> On 10/15/2015 1:44 PM, Bill Prince wrote: >> >> Yes. Midwest maximum rain rates are way up there. >> >> Looking back in our records, our AF24 (not HD) have lost ~~ 3 dBm during >> our last real rain event last December. These are 2.25 mile links. >> >> bp >> <part15sbs{at}gmail{dot}com> >> >> >> On 10/15/2015 11:38 AM, Eric Kuhnke wrote: >> >> The funny thing about the pacific northwest is that it's only ITU rain >> zone D. We get constant rain and drizzle and grey skies that causes >> acceptable fades (like, an 18 GHz link that normally sites at -37 with no >> rain will hang out at -49 for days at a time), but major downpour events >> are relatively rare. It's the mm/hour... >> >> If I recall correctly some locations that are less famously rainy such as >> Baltimore or Chicago actually have more frequent high mm/hour rain events >> than Seattle. Thus a link designed to be at max capacity for five nines >> will be shorter in Chicago than in Portland or Seattle. >> >> >> >> On Thu, Oct 15, 2015 at 11:36 AM, Bill Prince <[email protected]> >> wrote: >> >>> Agreed for the NW where you are. We're in the SF bay area, and we get >>> "rain", but not like you guys. For the last 4 years we haven't even gotten >>> that. >>> >>> I know of a couple situations that are getting almost 10 miles on a >>> AF24HD. >>> >>> bp >>> <part15sbs{at}gmail{dot}com> >>> >>> On 10/15/2015 11:31 AM, Eric Kuhnke wrote: >>> >>>> 5.5 miles is probably asking too much, I would use it at a max of 5-6 >>>> km in a Pacific Northwest rain zone. >>>> >>> >>> >> >> >> >>
