A rusted yagi could also cause these emissions.
On 2/24/2015 5:38 AM, Daniel White wrote:
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
[email protected] <mailto:[email protected]>
Skype: danieldwhite
Social: LinkedIn <http://www.linkedin.com/in/danielwhite84>
__
***************************************************************************
*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 3^rd 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]>
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