Technically, yes, but any means of obtaining the return loss gets you the info you need.
I use an old network analyzer that's one of the handiest gadgets around. Dick ----- Original Message ----- From: "Jeff DePolo WN3A" <[EMAIL PROTECTED]> To: <Repeater-Builder@yahoogroups.com> Sent: 21 December, 2005 09:26 Subject: RE: [Repeater-Builder] Duplexer tuning with Return Loss Bridge The Bird is a directional wattmeter. It's not a return loss bridge (it's not a bridge at all). Yes, you can compute a spot-frequency measurement of return loss that way, that doesn't help you with swept-frequency analysis using a spectrum analyzer and tracking generator. > -----Original Message----- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of Dick > Sent: Wednesday, December 21, 2005 12:01 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Duplexer tuning with Return > Loss Bridge > > > Yes, really. You measure the forward power, then turn the > element around > and measure the > reflected power. Then use 10 log (FP/RP) and you have the > return loss in > dB. > > Dick > > ----- Original Message ----- > From: "Jeff DePolo WN3A" <[EMAIL PROTECTED]> > To: <Repeater-Builder@yahoogroups.com> > Sent: 21 December, 2005 08:46 > Subject: RE: [Repeater-Builder] Duplexer tuning with Return > Loss Bridge > > > > The Bird Model 43 is a typical RLB. > > Oh really???!??!? > > The Eagle return loss bridges are a good value for the buck. > www.eagle-1st.com. They have a whitepaper on tuning duplexers too. > http://www.eagle-1st.com/notes/duplex/body.htm > > I believe IFR (now Aeroflex) sells (or at least sold) the Eagle RLB's. > > --- Jeff > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
