How is the link coordinated? Split like FDD or both frequencies at both
ends? You could try flipping frequencies around and see if the low RSL
follows.
I have a couple regular FDD links with the symptoms you describe. One I
know is a Tx or Rx problem at one end or the other since the Rx at one
side dropped 6dB in 10 minutes out of the clear blue one day and hasn't
changed since. Not worth replacing until one end or the other dies. Then
another link was perfect at -42dBm both directions until we had to
re-mount one end and moved down 1 to 2 feet. Looks like we ended up
getting just on the tip of a knife-edge diffraction point somewhere
along the path with that small change. Now in the morning, one side will
fade about 5dB, they'll equalize around noon and then the other end will
drop 5dB in the afternoon.
Moral of the story is to not rule out a path issue. But a defective
radio is certainly possible.
On 8/30/2016 4:36 PM, Sean Heskett wrote:
i guess you could ask what would make one side of a link 10db weaker
than the other.
mimosa tech support seems to be stumped as well. not sure where to go
from here. The B5s we've used are awesome...the B11 so far seems a
bit half baked :-/
-sean
On Tue, Aug 30, 2016 at 12:11 PM, Jaime Solorza
<[email protected] <mailto:[email protected]>> wrote:
I will attending a Mimosa certification class tomorrow all day...
Any questions I should ask?
On Aug 30, 2016 11:21 AM, "Sean Heskett" <[email protected]
<mailto:[email protected]>> wrote:
Hi Gang,
I've already contacted mimosa support and they seem to be
stumped too, so i thought I'd check with y'all to see if
you've seen the same issue.
We have a B11 link that is 6 miles clear LOS (we currently
have a dragonwave horizon compact plus 18Ghz link in place
that the B11 will be replacing). The PCN states we should
have a -42.5 the B11 interface states we should have a -40.9.
On the near side with is also the AP side we have a -42 (as
expected) however on the far side (station side) we have a
-53.2. Both sides are using the Jirous 2' dishes. We've
tried swapping radios on both sides, i've downgraded to 1.3.1
and back to 1.4.1 and we've moved the dishes 5' vertically on
both sides with no change. the station side is always about
10-12db worse. We are not on a sidelobe since the other radio
is at expected signal level.
Mimosa has stated they are "looking into it" and they have
another customer with a similar problem. I've provided them
VPN access and they have run some diagnostic scripts. It's
been almost 2 weeks since I first contacted mimosa and they
don't have any answer other than "we are working on it".
I'm ready to switch vendors to another product. We have to get
this link live because it's going to start snowing here soon.
Anyone else have this issue or have any other ideas of what to
try??
-Sean
