Re: 50 ohm termination

Toaster <toaster@dne3.net> wrote:

Can I get away with terminating the far end of a transmission line or
do I need a series resistor at the source and a parallel resistor at
the destination?
 
Thank you,
Toaster
 
 

Depends.

In general, when you just have one source and one load, with no taps along
the way, the best approach is to series-terminate the source.

That is, you put a 50Ω resistor in series with the output connector, and
let the load be essentially an open circuit.

The load sees the full signal amplitude, and there’s no huge power
dissipation.

Anyplace in between, the waveform is more complicated.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics