Must not be too critical if they are willing to wait 5 days to actually
run a test. Running on AT&T time I guess.
Of course, my partner's land line crapped out last Friday, and they
can't send a technician out to look at it until tomorrow.
Good luck with them Peter.
bp
<part15sbs{at}gmail{dot}com>
On 2/25/2015 11:23 AM, Peter Kranz wrote:
Meeting with AT&T on Friday..
*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]>
*From:*Af [mailto:[email protected]] *On Behalf Of *Jaime Solorza
*Sent:* Tuesday, February 24, 2015 4:59 PM
*To:* Animal Farm
*Subject:* Re: [AFMUG] 711Mhz carrier?
Any updates
Jaime Solorza
On Feb 24, 2015 11:43 AM, "Chuck McCown" <[email protected]
<mailto:[email protected]>> wrote:
Yep, however the chart does have warnings. I just wanted to take
a close look.
*From:*Bruce Robertson <mailto:[email protected]>
*Sent:*Tuesday, February 24, 2015 11:12 AM
*To:*[email protected] <mailto:[email protected]>
*Subject:*Re: [AFMUG] 711Mhz carrier?
They let you get that close in Class B? Hmmm...
On 02/24/2015 09:00 AM, Chuck McCown wrote:
Probably 300 feet but probably right in the center of the lobe
too.
*From:*Ty Featherling <mailto:[email protected]>
*Sent:*Tuesday, February 24, 2015 9:40 AM
*To:*[email protected] <mailto:[email protected]>
*Subject:*Re: [AFMUG] 711Mhz carrier?
Cool. How far from it did you get?
-Ty
On Tue, Feb 24, 2015 at 10:38 AM, Chuck McCown
<[email protected] <mailto:[email protected]>> wrote:
All the aircraft radios noised up and became unusable and
I was in class B airspace at the time flying with a
clearance.
*From:*Ty Featherling <mailto:[email protected]>
*Sent:*Tuesday, February 24, 2015 9:28 AM
*To:*[email protected] <mailto:[email protected]>
*Subject:*Re: [AFMUG] 711Mhz carrier?
What happened?
-Ty
On Tue, Feb 24, 2015 at 10:25 AM, Chuck McCown
<[email protected] <mailto:[email protected]>> wrote:
EIRP.
That is a 100 kW transmitter and a 10 dB antenna.
Don’t fly your plane too close to those. I did it once.
*From:*Ty Featherling <mailto:[email protected]>
*Sent:*Tuesday, February 24, 2015 9:23 AM
*To:*[email protected] <mailto:[email protected]>
*Subject:*Re: [AFMUG] 711Mhz carrier?
1mil Watts? Whoa!
-Ty
On Tue, Feb 24, 2015 at 10:07 AM, Bill Prince
<[email protected] <mailto:[email protected]>> wrote:
I read somewhere about lots of intermod issues
with the transition to DTV a few years back.
Probably more pronounced with the kind of power
levels they are using on some DTV stations. I
know that at least a couple of DTV stations are
transmitting at 90 dBm up on Sutro in SF.
bp
<part15sbs{at}gmail{dot}com>
On 2/24/2015 6:24 AM, Chuck McCown wrote:
The inadvertent diode story has been around
for a long time. I think it was much more of
a problem when you had two broadcasters at a
site where the difference between their
frequencies was on a 2 way FM repeater input
frequency. Every active electronic device on
the whole site could do the same thing.
Remember how everyone used to obsess about
intermod products at tower sites. Doesn’t seem
to be much of a problem any more. Or perhaps
it is but we are all on cell phones now.
*From:*Bill Prince <mailto:[email protected]>
*Sent:*Monday, February 23, 2015 5:14 PM
*To:*[email protected] <mailto:[email protected]>
*Subject:*Re: [AFMUG] 711Mhz carrier?
Oh I know. Our tower manager at Black Mt.
goes semi-ballistic when he sees anything on
the tower that is not HDG or stainless or
silicon-bronze. Then tells the story of
rusting bolts/nuts/washers turning into diodes
in the presence of higher-power RF. I don't
know how high the power needs to get, but we
have seen some interesting side-effects on
unshielded cable and other unshielded components.
bp
<part15sbs{at}gmail{dot}com>
On 2/23/2015 4:04 PM, Jaime Solorza wrote:
Noise can come from most unexpected
places. CQ rag had a story on spark plug
caused noise on motorcycle knocking out a
satellite system on bank building. Chucks
advise is good
And that would be my first step
Jaime Solorza
On Feb 23, 2015 3:08 PM, "Peter Kranz"
<[email protected]
<mailto:[email protected]>> wrote:
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
<tel:510-868-1614%20x100>
Mobile: 510-207-0000 <tel:510-207-0000>
[email protected]
<mailto:[email protected]>
!DSPAM:2,54ecae1d282581898217438!
