Re: [WISPA] 5 ghz backhaul sanity check
On 12/1/2014 8:48 AM, Mike Hammett wrote: 5150 != DFS. That's right, which is why it's +41 rather than +30. That number from the actual FCC approval that the NanoBridge M got for U-NII-1. The allowable maximum power is gated by the out-of-band EIRP at 5150, which has to be -27 dBm/MHz, a very stringent standard. That's why the technical U-NII-1 EIRP PTP limit of +53 dBm is never met, and why there's a petition to fix the rule. I think I saw one vendor radio get approval for +48 though, probably not using the same Atheros chipset. From the NanoBridge 5M's recent approval: FCC ID: SWX-NBM5D (SWXNBM5D, SWX NBM5D) Application: 802.11n 2x2 MIMO Application Type: Class II permissive change or modification of presently authorized equipment Equipment Class: II - Unlicensed National Information Infrastructure TX Date: 08/04/2014 Operating Frequencies: Grant Notes FCC Rule Parts Frequency Range (MHZ) Output Watts Frequency Tolerance Emission Designator 41 CC MO ND *15E* *5255.0* - *5340.0**0.0004*** ** 41 CC MO ND *15E* *5475.0* - *5595.0**0.0003*** ** 41 CC MO ND *15E* *5665.0* - *5715.0**0.0003*** ** 41 CC MO ND *15E* *5265.0* - *5320.0**0.0014*** ** 41 CC MO ND *15E* *5500.0* - *5580.0**0.0016*** ** 41 CC MO ND *15E* *5660.0* - *5700.0**0.0016*** ** 41 CC MO ND *15E* *5275.0* - *5310.0**0.0015*** ** 41 CC MO ND *15E* *5510.0* - *5550.0**0.0016*** ** 41 CC MO ND *15E* *5670.0* - *5670.0**0.0016*** ** 39 41 CC MO *15E* *5180.0* - *5240.0**0.0396*** Note that the first approvals on the list (around -5 dBm) are for operation very close to a band edge (5250 was a band edge at the time; it no longer is.) The U-NII-1 approval begins at 5180. However, XM 5.5.10 does allow the NanoStation to be tuned down lower, or even to 5155 if you set it to 5 MHz. And if you leave on "auto adjust to EIRP limit", it caps the power on the AP side to +36 (the PtMP limit) on 5150-5250, but doesn't enforce the +36 cap on 5725+. I'm not 100% certain that the test lab was following the rules, though, as there is no band edge to protect at 5725. *From: *"Fred Goldstein" *To: *wireless@wispa.org *Sent: *Sunday, November 30, 2014 11:23:35 PM *Subject: *Re: [WISPA] 5 ghz backhaul sanity check On 11/30/2014 11:55 PM, Josh Luthman wrote: > I have a link at 6.6 miles with a pair of Rocket M5. It's at 5765 and > has worked beautifully for a couple of years now. It is -55 on each > side with 2' dishes. > > I'm looking at doing another link that's almost identical (one similar > tower) and my calculations are showing if I use 5660 at 14dbm tx power > I should see -56. Does this sound right at all? 6.6 miles seems far > off the top of my head for the DFS band. The ERP limit there is +30, so if you're using +14 tx power, then the antenna gain is only 16 dB or you're noncompliant. That's what a NanoStation does on DFS. A big dish (like the 2 footer, around 30 dB gain) would still help with receive gain but you would have to turn down the Rocket to something lower (0 dBm). UBNT DFS stuff is approved for +41 dBm EIRP or so on the 5150 band, though. -- Fred R. Goldstein k1iofred "at" interisle.net Interisle Consulting Group +1 617 795 2701 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless -- Fred R. Goldstein k1iofred "at" interisle.net Interisle Consulting Group +1 617 795 2701 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
Re: [WISPA] 5 ghz backhaul sanity check
5150 != DFS. - Mike Hammett Intelligent Computing Solutions http://www.ics-il.com - Original Message - From: "Fred Goldstein" To: wireless@wispa.org Sent: Sunday, November 30, 2014 11:23:35 PM Subject: Re: [WISPA] 5 ghz backhaul sanity check On 11/30/2014 11:55 PM, Josh Luthman wrote: > I have a link at 6.6 miles with a pair of Rocket M5. It's at 5765 and > has worked beautifully for a couple of years now. It is -55 on each > side with 2' dishes. > > I'm looking at doing another link that's almost identical (one similar > tower) and my calculations are showing if I use 5660 at 14dbm tx power > I should see -56. Does this sound right at all? 6.6 miles seems far > off the top of my head for the DFS band. The ERP limit there is +30, so if you're using +14 tx power, then the antenna gain is only 16 dB or you're noncompliant. That's what a NanoStation does on DFS. A big dish (like the 2 footer, around 30 dB gain) would still help with receive gain but you would have to turn down the Rocket to something lower (0 dBm). UBNT DFS stuff is approved for +41 dBm EIRP or so on the 5150 band, though. -- Fred R. Goldstein k1io fred "at" interisle.net Interisle Consulting Group +1 617 795 2701 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
Re: [WISPA] 5 ghz backhaul sanity check
If you're using 2' dishes, you should be using a Tx power of around 0 dB. - Mike Hammett Intelligent Computing Solutions http://www.ics-il.com - Original Message - From: "Josh Luthman" To: "WISPA General List" Sent: Sunday, November 30, 2014 10:55:02 PM Subject: [WISPA] 5 ghz backhaul sanity check I have a link at 6.6 miles with a pair of Rocket M5. It's at 5765 and has worked beautifully for a couple of years now. It is -55 on each side with 2' dishes. I'm looking at doing another link that's almost identical (one similar tower) and my calculations are showing if I use 5660 at 14dbm tx power I should see -56. Does this sound right at all? 6.6 miles seems far off the top of my head for the DFS band. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
Re: [WISPA] 5 ghz backhaul sanity check
That's what the problem is, thanks. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Dec 1, 2014 12:25 AM, "Josh Reynolds" wrote: > Max EIRP is 30dBm on DFS. > > josh reynolds :: chief information officer > spitwspots :: www.spitwspots.com > > On 11/30/2014 07:55 PM, Josh Luthman wrote: > > I have a link at 6.6 miles with a pair of Rocket M5. It's at 5765 and has > worked beautifully for a couple of years now. It is -55 on each side with > 2' dishes. > > I'm looking at doing another link that's almost identical (one similar > tower) and my calculations are showing if I use 5660 at 14dbm tx power I > should see -56. Does this sound right at all? 6.6 miles seems far off the > top of my head for the DFS band. > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > > ___ > Wireless mailing > listWireless@wispa.orghttp://lists.wispa.org/mailman/listinfo/wireless > > > > ___ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless > > ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
Re: [WISPA] 5 ghz backhaul sanity check
Max EIRP is 30dBmon DFS. josh reynolds :: chief information officer spitwspots :: www.spitwspots.com On 11/30/2014 07:55 PM, Josh Luthman wrote: I have a link at 6.6 miles with a pair of Rocket M5. It's at 5765 and has worked beautifully for a couple of years now. It is -55 on each side with 2' dishes. I'm looking at doing another link that's almost identical (one similar tower) and my calculations are showing if I use 5660 at 14dbm tx power I should see -56. Does this sound right at all? 6.6 miles seems far off the top of my head for the DFS band. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
Re: [WISPA] 5 ghz backhaul sanity check
I missed that from his first email. yes, he would be over power at +14dBm. On Sun, Nov 30, 2014 at 11:23 PM, Fred Goldstein wrote: > On 11/30/2014 11:55 PM, Josh Luthman wrote: > > I have a link at 6.6 miles with a pair of Rocket M5. It's at 5765 and > > has worked beautifully for a couple of years now. It is -55 on each > > side with 2' dishes. > > > > I'm looking at doing another link that's almost identical (one similar > > tower) and my calculations are showing if I use 5660 at 14dbm tx power > > I should see -56. Does this sound right at all? 6.6 miles seems far > > off the top of my head for the DFS band. > > The ERP limit there is +30, so if you're using +14 tx power, then the > antenna gain is only 16 dB or you're noncompliant. That's what a > NanoStation does on DFS. A big dish (like the 2 footer, around 30 dB > gain) would still help with receive gain but you would have to turn down > the Rocket to something lower (0 dBm). > > UBNT DFS stuff is approved for +41 dBm EIRP or so on the 5150 band, though. > > -- > Fred R. Goldstein k1iofred "at" interisle.net > Interisle Consulting Group > +1 617 795 2701 > > ___ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless > -- Adair Winter VP, Network Operations / Owner Amarillo Wireless | 806.316.5071 C: 806.231.7180 http://www.amarillowireless.net ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
Re: [WISPA] 5 ghz backhaul sanity check
On 11/30/2014 11:55 PM, Josh Luthman wrote: > I have a link at 6.6 miles with a pair of Rocket M5. It's at 5765 and > has worked beautifully for a couple of years now. It is -55 on each > side with 2' dishes. > > I'm looking at doing another link that's almost identical (one similar > tower) and my calculations are showing if I use 5660 at 14dbm tx power > I should see -56. Does this sound right at all? 6.6 miles seems far > off the top of my head for the DFS band. The ERP limit there is +30, so if you're using +14 tx power, then the antenna gain is only 16 dB or you're noncompliant. That's what a NanoStation does on DFS. A big dish (like the 2 footer, around 30 dB gain) would still help with receive gain but you would have to turn down the Rocket to something lower (0 dBm). UBNT DFS stuff is approved for +41 dBm EIRP or so on the 5150 band, though. -- Fred R. Goldstein k1iofred "at" interisle.net Interisle Consulting Group +1 617 795 2701 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
Re: [WISPA] 5 ghz backhaul sanity check
that does seem a bit off to me. but maybe not. a bunch of my DFS shorts are with Nanobridge M5-25's and are all less than 5 miles. 2.2 miles running at -55. 3.8 miles at -62. adding 5 db more gain would put these at -50 and -57. the rest is just FSL On Sun, Nov 30, 2014 at 10:55 PM, Josh Luthman wrote: > I have a link at 6.6 miles with a pair of Rocket M5. It's at 5765 and has > worked beautifully for a couple of years now. It is -55 on each side with > 2' dishes. > > I'm looking at doing another link that's almost identical (one similar > tower) and my calculations are showing if I use 5660 at 14dbm tx power I > should see -56. Does this sound right at all? 6.6 miles seems far off the > top of my head for the DFS band. > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > ___ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless > > -- Adair Winter VP, Network Operations / Owner Amarillo Wireless | 806.316.5071 C: 806.231.7180 http://www.amarillowireless.net ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
[WISPA] 5 ghz backhaul sanity check
I have a link at 6.6 miles with a pair of Rocket M5. It's at 5765 and has worked beautifully for a couple of years now. It is -55 on each side with 2' dishes. I'm looking at doing another link that's almost identical (one similar tower) and my calculations are showing if I use 5660 at 14dbm tx power I should see -56. Does this sound right at all? 6.6 miles seems far off the top of my head for the DFS band. Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 ___ Wireless mailing list Wireless@wispa.org http://lists.wispa.org/mailman/listinfo/wireless
