Answer / nitesh

when we have +ve voltage we can not transmit for long
distance cause that will come to 0 volt or voltage get
attenuated but if we have -48 volt that voltage lower to
ground potential losses will be very less couse always
energy flows from higher poitential to lower so so -48
lower potental simply never come to ground potential

My present SMPS ( +12V, -12V outputs, 1Amp Rating ) was faulty.I donot have similar model however i have two + 12V SMPS available. Can i use both of these SMPS as a replacement to present SMPS by connecting one of SMPS in reverese polarity.

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