You'd absolutely, ABSOLUTELY limit the energy you emit (the frequency converted input signal) to fit within the allowable "channel" you're repeater/transponder is coordinated. That's no different with the FM brand of repeater. You're responsible for your output. The IF is where you'd probably want to limit the frequency "excursions" of the input signal. We do that now. If the user's off frequency, part of their energy is clipped off by the filtering of the IF bandpass.
As to the ID, MCW should suffice. I don't see any requirement that you must ID in the mode your delivering. Otherwise you'd be required to have a voice ID for a FM voice repeater and not CW. I hope no one minds this thread. I'm finding it fun and a good discussion of the merits/problems with doing something a little different. 73 Rod ---- Nate Duehr <[EMAIL PROTECTED]> wrote: > On 4/26/07, Rod Lane <[EMAIL PROTECTED]> wrote: > > > go through unimpeded ( and undistorted.) One possible minor down side > > is that the user's radio needs to be somewhat on-frequency. If they > > come in 1 KHz low, they go out 1 KHz low. In theory, it's not the > > repeater owner's problem, but can be noticed on the output. > > Numerous issues there... > > If they're off-frequency, so is your repeater... and your repeater is > only coordinated ON-frequency. This would be a bigger deal in areas > (like mine) if you were on VHF with 15 KHz channel-spacing, for > example... letting your linear transponder repeater doing digital > traffic splatter all over your neighbor's analog output isn't going to > win many friends. > > If they're over-deviating... same thing... unless you brick-wall limit > them and cause the waveform to clip, making it useless... but at least > they'd know their radio was Foo-BAR'ed up... > > Etc. Etc. Etc. There be dragons here. > > I don't think it's good engineering practice to put the end-users that > much "in charge" of the signal you're putting out with your callsign > on it. > > That would be another interesting thing... how to ID it properly... > digital? CW? That one's easier than the others... but still a > headache. > > (Come to think of it, now I want to go read the regs on satellite > ID's... heh... hmmm... How does that work? The beacon? What if it's > off, but the transponder's still on? Interesting campfire question > for AMSAT friends... please answer off-list if you're tempted... ha... > not here, unless we're going to start discussing linear ORBITING > transponders as a form of "repeater"... GRIN...) > > Nate WY0X > p.s. Want to drive people crazy? Hack up the code in your digital > radio to understand received traffic that's been INVERTED by an > inverting linear transponder... LOL... no encryption, just > mega-geekiness...
