Honestly haven't put that much work into it (well its really not my problem anymore, but the techs still call me with the weirder ones). Just get a truck roll out there every six months or so. I think the techs are primarily replacing the radios... maybe the radios are going deaf?
The SM shows the power level at -60 to the AP, and the AP shows -70. SA shows the whole spectrum in the -60 range, but then the noise clears up, then comes back... so it makes me think something is transmitting and causing issues. Anyways it sounds like it warrants further investigation. Daniel White 3-dB Networks -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chuck McCown - 3 Sent: Thursday, August 07, 2008 9:05 PM To: WISPA General List Subject: Re: [WISPA] Harmonic Frequencies With that much power on UHF TV a rusty nail in a fence could be mixing that channel with some other broadcast frequency and making a signal on your frequency. Anything is possible when you get close to high power RF. Can you drive a quarter mile away and get a good signal? Try to see if the proximity to the transmitter is the problem. What does the spectrum analyzer function show? If the TV station is your problem, you should be able to localize it to the transmitter building, feedline/tower or antenna by using the SM as a sniffer in spectrum analyze mode. ----- Original Message ----- From: "3-dB Networks" <[EMAIL PROTECTED]> To: "'WISPA General List'" <wireless@wispa.org> Sent: Thursday, August 07, 2008 8:56 PM Subject: [WISPA] Harmonic Frequencies >I understand the principle of harmonic frequencies, but in this case I'm >not > sure about the application... > > I've got a Canopy SM mounted to the control building of a 1000ft > communications tower. SM has odd jitter/spectrum analysis readings. > Tower > engineers claim nothing on the tower is operating close to the 5GHz band > (the AP is on 5.275GHz). No other customers in the area are having any > issues at all. > > The only thing the tower engineer could think of was that he has a > transmitter operating on 566MHz at 30kilowatts of power. Harmonics should > be 5.094GHz and 5.660GHz that would be near the band. > > So my question is, could my source of interference be that transmitter? > Or > am I missing something else altogether. > > Daniel White > 3-dB Networks > > > > ---------------------------------------------------------------------------- ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------------- ---- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > ---------------------------------------------------------------------------- ---- WISPA Wants You! Join today! http://signup.wispa.org/ ---------------------------------------------------------------------------- ---- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
