This explanation sounds right.
If the Link Planner software says "down tilt" without specifying
mechanical, I would assume you subtract the electrical down tilt.
------ Original Message ------
From: "Mathew Howard" <[email protected]>
To: "af" <[email protected]>
Sent: 6/30/2017 2:55:24 PM
Subject: Re: [AFMUG] epmp 2000 downtilt
I'm thinking it's not taking the built in downtilt into account. I'm
planning with an online downtilt calculator, and it's showing the outer
radius as only being 1.45 miles at 200' and 4.5 degrees downtilt.
Those have a 6 degree vertical beam, so I'd normally shoot for around
2.5-3 degrees total downtilt (using the reasoning that there aren't
going to be any customers floating around in the sky). Personally, I'd
just put it at somewhere between 0.5 and 1 degree mechanical downtilt
and call it a day.
On Fri, Jun 30, 2017 at 1:46 PM, Steve Jones
<[email protected]> wrote:
we have always gone between 0 and 1 degree downtil after drive
testing. we never cranked it down that extreme though.
maybe some cambium guy can clarify whether the link planner antenna
pattern takes into account the built in tilt
On Fri, Jun 30, 2017 at 1:43 PM, Mathew Howard <[email protected]>
wrote:
Yeah, I would think Linkplanner would know about that... but there is
2 degrees of electrical downtilt on those antennas, so that's like
4.5 degrees total... seems excessive to me.
On Fri, Jun 30, 2017 at 1:30 PM, Steve Jones
<[email protected]> wrote:
its just what linkplanner says when I run the tilt calc. I assume
this means mechanical elevation
On Fri, Jun 30, 2017 at 1:26 PM, Mathew Howard
<[email protected]> wrote:
Is that in addition to the built in downtilt?
On Fri, Jun 30, 2017 at 1:23 PM, Steve Jones
<[email protected]> wrote:
we are running these at 8 miles
sticking sms in along the bore and the edges at 1 mile, 3 mile 5
mile and 8 mile (15foot)
Linkplanner keeps telling us 2.5 degrees downtilt is what we want,
even with removing the 1 mile and 3 mile sets. this is the same 80
feet to 200 feet AGL, mostly flat terrain.
That seems like a lot to me
