some of the ubiquiti poe supplies are noisy... some not.
Since I have 5 poe access points pointing in different directions, i
have two third party power hubs one a 24vdc one a 48 vdc ... both
carry CE markings as does the last Ubiquiti POE ps I used. I do
remember back a while I did have ferrites on both sides of one early
switchers.
Also my HF antennas are at at least 50 feet away , with the tower 140
feet out.
No broadband available for about three miles away. So much for RURAL
BROADBAND.
having to deal with a bit of rfi supression is a small price to pay for
having broadband.
On 10/22/2019 4:09 PM, Jim Brown wrote:
On 10/22/2019 12:56 PM, Joe Subich, W4TV wrote:
The typical source of noise with PoE is from the switching supply -
either connected to a power injector or in some terminal device
(e.g. Router/Modem) with the Ethernet cable acting as the antenna.
Common mode chokes on the Ethernet cable as close to the device as
possible should help but experimentation (and replacing the noisy
power supply) will probably be necessary.
If that is the ONLY source, it might be better to replace it with a
linear supply of suitable current rating. I wouldn't be certain that
it is the only source -- perhaps there's some power conversion
happening at the unit (that is, up on the pole), in which case a choke
there would also be required.
But that doesn't answer the key question I asked Bill -- is the system
noisy or not.
73, Jim K9YC
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
