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]
*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.
