3 Jan
2022
3 Jan
'22
12:59 a.m.
On 1/2/22 3:17 PM, Toussaint OTTAVI via 44Net wrote:
But I'd like to be able to carry 10 MHz reference signal to various locations in the
shack over network cabling. My first idea is about using existing converters for TV/SAT :
- RF to Ethernet passive couplers (a F connector tied to pins 1-2 of a RJ45 connector, $1
on Chinese warehouses).
- RF to fiber adapters (such as those used in FTTH/CATV). But a first look shows
frequency range is 50-1000 MHz.
I have not handled that particular scenario. What we have done (at least temporarily):
- used commercial "video distribution amplifiers" from the old analog video days
to split the 10 MHz signal over several coax outputs. works fine.
- used "coax to utp baluns" from China (intended to use oldfashioned analog
cameras over UTP wiring). also worked fine while we needed it. I think that is what you
meant with the first option?
So I guess the combination of these two will also work.
Video stuff is of course specifiied for the 0-6 MHz range but as long as there is no
intentional lowpass filter in them, it will work at 10 MHz.
Of course the CATV baluns do not work well for the purpose they are intended for, but for
10 MHz it does not really matter.
But I think using coax is the better option, it tends to radiate (and pickup interference)
less than UTP.
Rob