I was wondering about ducting as well....like maybe when the weather is
just right their link bumps into yours.
I would guess that's something a frequency coordinator could look into.
On 12/11/2015 2:46 PM, Ken Hohhof wrote:
It would appear to be interference into Side 1. MSE=SNR, and –7.70 is
terrible, not good enough apparently to link even at QPSK.
So who is stepping on your frequency and polarization? Or legally on
your frequency but not supposed to be aimed at you. Could possibly be
some reflection or ducting thing, but the interfering signal appears
to be at about –55, which is more than just some low level
interference keeping you from achieving full modulation.
The other possibility is a radio problem.
*From:* mailto:[email protected]
*Sent:* Friday, December 11, 2015 12:34 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* [AFMUG] Trango Apex Issue
Twice a year for a few weeks we have a Trango Apex 11GHz link that
acts up. Here is what we are seeing:
Side 1:
# linktest
LOCK RSSI MSE BER TX RX
1> 0 -43.40 dBm -7.70 dB 0.00E+00
QPSK QPSK
Side 2:
# linktest
LOCK RSSI MSE BER TX RX
1> 1 -45.00 dBm -34.30 dB 0.00E+00
QPSK 64QAM
Any idea what could be causing this? We saw something similar on Giga
11GHz links as well.
