If it’s an 820C, isn’t that dual core, meaning 2 radios in one unit,
no separate combiner needed?
*From:*Af [mailto:[email protected]] *On Behalf Of *Bill Prince
*Sent:* Tuesday, October 25, 2016 10:27 AM
*To:* [email protected]
*Subject:* Re: [AFMUG] UT Local Ceragon Installer
Are the two radios mounted through an OMT or such? Did they happen to
switch which one is V and which one is H?
bp
<part15sbs{at}gmail{dot}com>
On 10/24/2016 8:06 PM, Sterling Jacobson wrote:
Well, worst case scenario someone along the way f’ed up the
hardware and I would need the same installer(s) to know enough to
tell me I need a new part or whatever.
They did take apart the mount and maybe even the antenna from the
radio in order to shift it to left or right hand mount.
So there is a possibility something happened when they did that.
This link WAS working from the same mountain tower to a slightly
different location about the same distance just on one polarity
for over a year.
Because of licensing, I had to have the radio pair removed, and
moved to opposite locations, with some storage in between time etc.
I’m going to be super pissed if something happened physically to
the radios or dishes.
But at the moment everyone working on it so far is too stupid
(including myself) to know the difference between config/aim and
hardware issue.
I’ll still pay to have someone competent tell me that everything
is all good except that I need a part fixed, IF they can discern
that with confidence.
*From:*Af [mailto:[email protected]] *On Behalf Of *Ken Hohhof
*Sent:* Monday, October 24, 2016 9:00 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] UT Local Ceragon Installer
Misalignment will almost always affect both directions. Yes, on a
licensed link the 2 directions are different frequencies, but not
that different.
What you describe sounds kind of like a bad radio, or a
configuration problem. Like xmt power set wrong on one end, or a
xmt frequency out of range of the diplexer. I’m not familiar with
Ceragon ordering, but I assume they have different diplexers for
different sub bands.
*From:*Af [mailto:[email protected]] *On Behalf Of *Sterling
Jacobson
*Sent:* Monday, October 24, 2016 9:45 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] UT Local Ceragon Installer
That’s probably exactly what happened.
They spent hours on it and were still way off on dB on one side only.
That’s why I assume the other side is angled or rotated too far
(dual polarity X-Pic).
One guy didn’t even use the volt meter, just had someone read dB
from the web page.
They didn’t even ask for angles, degrees, nothing.
Just all by supposed line of sight, no scopes, and not even
binoculars I think.
I wasn’t too happy about the whole situation, so I don’t want a
repeat of that.
It’s less than 10 miles across Utah Lake, one end on a leg on a
tower on top of a mountain, the other on a smaller tower attached
to concrete wall near the freeway.
*From:*Af [mailto:[email protected]] *On Behalf Of *Ken Hohhof
*Sent:* Monday, October 24, 2016 8:38 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] UT Local Ceragon Installer
Are these big dishes? Did you not get a well defined peak during
alignment? Is the signal more than a couple dB less than
predicted, like 20-30 dB low? You’re on a sidelobe. I’ve had
experienced tower guys run into this. They tend to be stubborn and
believe they can align a dish with a 1 degree beamwidth by eye,
and then they spend half an hour trying to tweak the alignment to
get an extra 1 dB when they’re 20 dB off. Once the signal starts
getting worse, they go back the other way instead of continuing.
Convince them to do a wide sweep, and they find the main lobe.
You have to go through the valley to find the mountain.
*From:*Af [mailto:[email protected]] *On Behalf Of *Sean Heskett
*Sent:* Monday, October 24, 2016 9:14 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] UT Local Ceragon Installer
The angle of the leg shouldn't matter...at most you'd loose ~3db
but it'd have to be almost at a 45* angle for that. (Chuck did a
demo at one of the animal farm events)
If you can get me remote access I can look at the config for ya.
They are very un-intuitive to say the least lol.
-Sean
On Monday, October 24, 2016, Sterling Jacobson
<[email protected] <mailto:[email protected]>> wrote:
I need to get my Ceragon link running, it's been forever.
I think someone on this list had offered me their service
local to Utah for this.
I am paying for this, either by Job or by hour.
If you remember offering, and it's you, or you think you would
like to help, then let me know.
I've got the link installed on both sides and configured, just
something not lined up or configured correctly.
The local guys I used originally earlier this year couldn't
figure it out.
And I think the mountain side link is not mounted true and
needs a proper mounting on the leg, or hardware to mount it
true, not on the leg at an angle.
