Pac uses the same grid, some mount, for 2.4 and 5. Difference is the feed horn. Length of the feedhorn is the same as the focal point of the parabola does not change with frequency. Simple math on that one.
The depends comment is that different performance parameters change the size of the feed. For example, Pac uses a 2" or so diameter feed in a 29dB grid and a 6" or so feed in the 2' dish, also about 29dB I believe. Josh Luthman wrote: > Are all parabolic grids the same visually? I would expect the mounting > hardware to be most distingushable. > > Do you mean you can NOT depend on a lot of things, Scott? > > >From what I've picked up on this thread is there is no real way to identify > a dish nor feedhorn for polarity/frequency. Stickers are a must. Hear that > manufacturers? > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > "When you have eliminated the impossible, that which remains, however > improbable, must be the truth." > --- Sir Arthur Conan Doyle > > > On Wed, Oct 21, 2009 at 11:30 AM, Scott Reed > <scottr...@onlyinternet.net>wrote: > > >> Feed length is based on dish size; where does the parabola focus. >> Nothing to do with frequency, everything reflects the same. >> Size of the feed horn isn't always an indicator either. Can depend on a >> lot of things. >> >> Josh Luthman wrote: >> >>> The feedhorn specifically. Maybe the length will help you too. I know >>> >> with >> >>> higher gain the 5GHz grids are noticeably longer. >>> >>> Josh Luthman >>> Office: 937-552-2340 >>> Direct: 937-552-2343 >>> 1100 Wayne St >>> Suite 1337 >>> Troy, OH 45373 >>> >>> "When you have eliminated the impossible, that which remains, however >>> improbable, must be the truth." >>> --- Sir Arthur Conan Doyle >>> >>> >>> On Wed, Oct 21, 2009 at 10:48 AM, Brad Belton <b...@belwave.com> wrote: >>> >>> >>> >>>> Hmmm, pretty sure a 2' dish is a 2' dish regardless of frequency...or >>>> >> are >> >>>> you speaking of the diameter of the feed? >>>> >>>> Best, >>>> >>>> >>>> Brad >>>> >>>> -----Original Message----- >>>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On >>>> Behalf Of Josh Luthman >>>> Sent: Wednesday, October 21, 2009 9:40 AM >>>> To: WISPA General List >>>> Subject: Re: [WISPA] Identifying 2ft dish frequency >>>> >>>> Can you measure diameter and compare it with the 2.4 and 5.8 GHz dishes? >>>> Never thought about it but they would have to be different sizes. >>>> >>>> Josh Luthman >>>> Office: 937-552-2340 >>>> Direct: 937-552-2343 >>>> 1100 Wayne St >>>> Suite 1337 >>>> Troy, OH 45373 >>>> >>>> "When you have eliminated the impossible, that which remains, however >>>> improbable, must be the truth." >>>> --- Sir Arthur Conan Doyle >>>> >>>> >>>> On Wed, Oct 21, 2009 at 10:34 AM, Mark McElvy <mmce...@accubak.com> >>>> >> wrote: >> >>>> >>>>> I happen to know they are either 5.8 or 2.4 as this was the only >>>>> equipment I have found of theirs, they left it all when they went out >>>>> >> of >> >>>>> business. >>>>> >>>>> Mark McElvy >>>>> AccuBak Data Systems, Inc. >>>>> 573.729.9200 - Office >>>>> 573.729.9203 - Fax >>>>> 573.247.9980 - Mobile >>>>> http://www.accubak.com/ >>>>> http://www.accubak.net/ >>>>> Nationwide Internet Access >>>>> Accurate backups for your critical data! >>>>> >>>>> >>>>> -----Original Message----- >>>>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] >>>>> >> On >> >>>>> Behalf Of ccrum >>>>> Sent: Wednesday, October 21, 2009 9:29 AM >>>>> To: WISPA General List >>>>> Subject: Re: [WISPA] Identifying 2ft dish frequency >>>>> >>>>> Got a spectrum analyzer and a frequency generator? Or a good network >>>>> analyzer will do, but most people don't have one laying around. The >>>>> feeds could literally be anything. You might be better off just calling >>>>> the MFG of the dish and buying new feeds in the range you want unless >>>>> you you have a few hours of extra time on your hands. >>>>> >>>>> Cameron >>>>> >>>>> Mark McElvy wrote: >>>>> >>>>> >>>>>> I have 4 two ft dishes that where pulled down when the previous wisp >>>>>> went out of business. There are no markings on them and I need to >>>>>> determine frequency and polarity. >>>>>> >>>>>> >>>>>> >>>>>> Mark McElvy >>>>>> AccuBak Data Systems, Inc. >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >> ------------------------------------------------------------------------ >> >>>>> -------- >>>>> >>>>> >>>>>> WISPA Wants You! 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