That's not exactly true. TIA-603-C clearly states that there are two reverse-burst formats, 120 (AKA 240) and 180 degrees, and gives neither one special "standard" status. Motorola found that a 120-degree reverse-burst shift stopped the mechanical reeds quicker than a 180-degree shift. Now that DSP has replaced mechanical reeds, the technical aspect has lost its importance.
Nate is correct that the shift is now a marketing ploy, wherein a newly-installed Brand X repeater will suddenly cause all Brand Y radios to have squelch crashes, and the Brand X sales rep will claim that the Brand Y radios use "obsolete" technology. That happened in my local police department when a Brand X repeater was installed; a large number of Brand Y radios were immediately replaced with Brand X radios. 73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of wd8chl Sent: Tuesday, February 03, 2009 11:22 AM To: [email protected] Subject: Re: [Repeater-Builder] Kenwood TKR-850 question <snip> > > Snuck a little Marketing into their programming software, did they? :-) > > Nate WY0X > > ------------------------------------ Yeah-especially since the 120 degree shift is the 'non-standard' shift. WD8CHI
