Peter,
They will not go away until they can't read a carrier out of your equipment. So probably ~-120dB or so. I'd at least isolate which radio it is. Have him take measurements while you turn one radio off, then the other. I've seen lots of reasons for radios to otherwise start spewing noise into 700MHz. it could be a harmonic of an IF frequency inside the radio, or a failing component for instance (or just an out of spec component). No manufacturer I am aware of tests for supurious emissions past the FCC certification requirements initially (not something you check on a per radio or even per batch basis). *************************************************************************** Daniel White - Managing Director SAF North America LLC Cell: +1 (303) 746-3590 <mailto:[email protected]> [email protected] Skype: danieldwhite Social: <http://www.linkedin.com/in/danielwhite84> LinkedIn *************************************************************************** From: Af [mailto:[email protected]] On Behalf Of Peter Kranz Sent: Monday, February 23, 2015 5:08 PM To: [email protected] Subject: [AFMUG] 711Mhz carrier? Had an AT&T contractor show up at one of our datacenter sites today and claim that one of our radio systems was emitting a carrier at 711Mhz and he pointed at where we have a Dragonwave Compact 18Ghz system and Redline AN-80i 5Ghz system mounted on the building. 711Mhz doesn't sound like an IF of either of these systems to me, but I've got tickets in with the equipment manuf. It looks like they are some 3rd party AT&T has sweeping buildings downtown. Anyone dealt with these guys before? He told me he measured a -87 with his directional antenna 10 feet away from the equipment and acted like that was a really big deal, sounds like a pretty low level to me honestly. Anyone know what the legal limits for spurious emissions are in the 700-800Mhz band? Peter Kranz Founder/CEO - Unwired Ltd www.UnwiredLtd.com <http://www.unwiredltd.com/> Desk: 510-868-1614 x100 Mobile: 510-207-0000 [email protected] <mailto:[email protected]>
