> >Adding or removing cable lengths between the transmitter and
> duplexer also
> >does not change the VSWR as seen by the transmitter (minimal
> cable loss
> >effects notwithstanding).
> >
> > --- Jeff
> True but only if everything (tx out, cable and duplexer) is matched Z.
No, NOT true. The VSWR always remains the same, only the impedance at the
transmitter end of the interconnect cable going to the duplexer changes.
> If duplexer in and tx output are not exactly the same then
> adding or subtracting cable lengths can change the vswr the tx sees.
No, it will not.
> I have seen this in real life, I do not have a network
> anylizer so I can not be sure what was happening but to make
> the tx happy some cable was added until the reflected power
> was minimized and the desense went away like magic.
Yes, you were changing the Z the transmitter sees. You were NOT changing
the VSWR. The two are not the same. Re-read follow up posts from the last
week or so for further clarification.
--- Jeff
