This is, incidentally, why isolators should be used on these runs. This does create a problem with LNAs that are DC powered via coax, however the reality is that many antennas and receivers do not have that great a match to the coax impedance and could benefit from the clean up of an isolator. (however as magnetic devices, I wonder about the delay stability of isolators as a function of temperature)
And while on the obsessive kick, if using splitters, unused ports must be terminated. Group delay measurements of an RF transmission system can reveal a lot of problems that simple loss and return loss will not catch. Lester B Veenstra M0YCM K1YCM M0YCM/6Y5 K1YCM/6Y5 Mail Address: Lester Veenstra Dawn Cottage Norwood, Harrogate HG3 1SD UK Telephones: Office 940-6456 Office +44-(0)1423-846-385 Home: +44-(0)1943-880-963 UK Cell: +44-(0)7716-298-224 -----Original Message----- <NIP> John ...... minimise the effects of residual mismatches at either end of the cable. Bruce _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
