I have problem witch Mikrotik in outside box in about 3 m from MT is TV antena and when i put power on to MT one channel (36) is snowing on TV. Other channels are OK. When i get power off from MT everythig is OK.
The mikoritk is grounded. The same is when i dissconet anneta from MT and get out Wireeles Cards.
I seen this too
Someone told me it was the cat5.
For a test can you not use POE but use header to see if it still snows?
If it fix it maybe STP will help?
If it is the Cat5, stick a ferrite choke around it, close where it meets the unit outside.
It is a well known problem, and it seems to be connected to certain batches of RB. We have seen it on both 532 and its variants, but never on RB220/230. We do not have experience with the 100-series.
We have tried to work around it with shielded cables, perfect grounding, different PSU’s with and without ferrite, different radios (type and make) and I don’t know what…
The only fix we know of, is to find a different RB, purchased at a different time - and then put the noisy one up on a spot where noise doesn’t matter.
I have a similar problem with an AM radio and a mikrotik 112 board w/ SR9 card.
Another seperate instance with a Tranzeo 2.4GHz CPE (TR-CPQ-19f) and snowy picture on VHF channel 3.
Another seperate instance with a Tranzeo 2.4GHz CPE (TR-CPQ-19f) and setting off an emergency pager at random.
I’ll give the ferrite choke a shot and see if it fixes any of the above problems.