Hey Tim, Does this rule have a reason? Or is it just a rule for rule's sake?
On Tue, Jan 5, 2021 at 4:47 AM Tim Hardy <[email protected]> wrote: > A note of caution: Some vendors have been pushing the notion that at 11 > GHz, one can coordinate and license an 80 MHz bandwidth pair along with a > 40 MHz bandwidth pair separated by 60 MHz to in effect get a contiguous 120 > MHz of spectrum. This is okay as long as you are transmitting two distinct > frequency pairs - one with 80 MHz, and the other with 40 MHz. In the US it > is NOT okay to unlock the radio to use ETSI 112 MHz bandwidth and transmit > a single pair. Vendors that are pushing this concept need to stop as it > violates at least two and possibly more FCC Rules. The licensee would be > taking the risk - not the vendor. > > On Jan 4, 2021, at 3:54 PM, <[email protected]> < > [email protected]> wrote: > > With the SIAE radio: > - 2+0 XPIC - minimal loss using the built-in OMT branching unit on the > order of 0.5 dB per end > - 2+0 ACCP - 3.5 dB loss per end using the built-in Hybrid branching > unit > No TX power back-off required in either mode, nor do you need to back-off > the TX power when using POE. > > The ALFOPlus2XG radio has independent modem & RF, so there is flexibility > on how you could setup each radio. Each carrier can have its own channel > bandwidth & modulation. > > The branching units are field changeable and allow the ODU to bolt > directly to the back of the antenna. > > > Thanks, > > <Mail Attachment.jpeg> > > Joe Schraml > VP Sales Operations & Marketing > SIAE Microelettronica, Inc. > +1 (408) 832-4884 > [email protected] > www.siaemic.com > > >>> Mathew Howard <[email protected]> 1/4/2021 12:01 PM >>> > Yeah, you can do 2 x 80mhz channels with a single core on some radios, but > there are some limitations. Depending on the radio, my understanding is > that they have to either be adjacent, or very near each other (definitely > within the same sub-band). It seems to me that some radios can even do two > different sizes of channels (like 1 80mhz + 1 40mhz), but I could be > remembering that wrong. If I understand it right, the Aviat radios have a > significant tx power hit when you activate that feature, which probably > makes it unusable in a lot of cases. We're doing that on a Bridgewave 11ghz > link (using 4x 80mhz on a dual core radio), and there's it works fine, with > only a minor performance hit on those radios. SIAE does have that feature > as well, but I don't remember if there was a significant performance hit or > not... I think they may have been the ones that could use two different > sizes of channels. > > On Mon, Jan 4, 2021 at 1:51 PM Ken Hohhof <[email protected]> wrote: > >> Probably, LinkPlanner is pretty smart. >> I assume you don't want to use 2 antennas. >> There are some licensed radios now that I think can do 2 x 80 MHz >> channels in a single core, like from Aviat or SIAE maybe, I don't know if >> this gets around the splitter cost and performance issues. I may have that >> feature completely wrong, I haven't looked into it. There could also be a >> performance hit by using the same xmt power amp for 160 MHz. >> I also haven't checked out the full feature set of the new PTP850C, the >> only thing I know it has is SFP+. >> >> ---- Original Message ---- >> From: "Adam Moffett" <[email protected]> >> Sent: 1/4/2021 1:30:45 PM >> To: [email protected] >> Subject: Re: [AFMUG] 2+0 Co-Polar >> >> Ok yeah, the Link Planner BOM shows some splitters. I wonder if Link >> Planner already accounted for the additional losses when I selected "Co >> Polar" on the dropdown. >> >> >> On 1/4/2021 2:25 PM, Ken Hohhof wrote: >> > I seem to remember that different channel different polarization is the >> best, if your radio manufacturer charges for an XPIC license key. Next best >> is XPIC. And that the problem with different channel same polarization is >> you need a splitter which costs several dB of system gain. But that's from >> memory, and mine is not so reliable. >> > >> > ---- Original Message ---- >> > From: "Adam Moffett" <[email protected]> >> > Sent: 1/4/2021 1:16:26 PM >> > To: "AnimalFarm Microwave Users Group" <[email protected]> >> > Subject: [AFMUG] 2+0 Co-Polar >> > >> > I'm looking at a path where the coordinator can get me two 50mhz XPIC >> > channels, or two 80mhz H-Pol channels. >> > >> > I've never installed co-polar. Do you need a lot of extra junk to make >> > that work? >> > >> > >> > >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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