Brilliant as usual Skip.....if the device you are using is active low toggle it to active high...the alluded problem....power fails - goes low and keys up...love listening to carriers!! You actually can learn a lot from carriers...especially pigeons!
Doug On 03/06/2010 16:53:46, skipp025 (skipp...@yahoo.com) wrote: > Re: Active Low COR > > > What is the advantage of an active low COR. > > Goes well with red wine... > > > Most I have talked to say they have their controllers set > > that way, so I set mine that way,plus the Maxtrac I am using > > as a receiver default is active low. > > Normally... > If the source device fails, the trailing device does not > receive an active low (turn-on or key on the air) logic > signal. > > > I simulated a power failure to the receiver and the line > > went low and the transmitter thought it was time to > > transmit. > > Normally one would hopefully expect the active low output of > a device (receiver) not to have adjacent paralleled parts > (resistors) pulling the output control (cor) line down when > the unit loses power. The "pull-up resistor" located at the > input of the trailing device ensures the receiver status on/off > doesn't matter to the controlling logic line. > > So it's probably the > location of a pull up resistor and now > you've described a valid reason for preferring an active high > cor in your specific situation. > > > I also accidentally pulled the cord from the controller off > > the back of the receiver and aga
