We just did two 11+ mile links on HP3-11's. And the guys ended up about
20dB from target RSL on both of them. I said you're stuck on side lobes,
try again. They were all like, well, how are we supposed to aim these
things if it's hazy and we can't see the other end? I promptly and semi
violently explained that you get behind the motherf***er and eye it up
with that house/tree/whatever a 1/2 mile away that I told you was in the
center. And then you peak it out with the volt meter. This shit ain't
rocket science. No, instead you were 10 degrees off of where I told you.
Sometimes you can't fix derp.
In your case though, why way off on one side? Sounds more like Tx power
setting. Maybe ATPC is on and misconfigured? I did that on a Trango
once. Confused the hell out of me for a few minutes until I saw what I
did.. or didn't do (set power per mod in the ATPC setup).
On 10/24/2016 9:45 PM, Sterling Jacobson wrote:
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:af-boun...@afmug.com] *On Behalf Of *Ken Hohhof
*Sent:* Monday, October 24, 2016 8:38 PM
*To:* af@afmug.com
*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:af-boun...@afmug.com] *On Behalf Of *Sean Heskett
*Sent:* Monday, October 24, 2016 9:14 PM
*To:* af@afmug.com <mailto:af@afmug.com>
*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 <sterl...@avative.net
<mailto:sterl...@avative.net>> 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.
