PCM and std FM

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  • rpm
    Junior Member
    • Apr 2003
    • 57

    #1

    PCM and std FM

    Whats the point of delaying a failsafe signal? I want my boats to surface as soon as the link is comprimised. like with PCM

    I have found that PCM rarely falsely triggers it's failsafe, it has always been because too deep.
  • Guest

    #2
    I've already explained the reason

    I've already explained the reason for a delayed failsafe in submarines.

    Andy

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    • koeze
      Junior Member
      • May 2003
      • 204

      #3
      PCM will not surface your

      PCM will not surface your boat when the signal goes bad. It will substitute a signal (last known good or preprogrammed) as long as the signal is out of the set bounderies. As soon as the recieved servo signal within 1ms to 2ms it switches back to the recieved signal.

      EJK

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      • tmsmalley
        SubCommittee Member
        • Feb 2003
        • 2376

        #4
        Once in awhile, you may

        Once in awhile, you may lose signal for a second or two that has nothing to do with a radio problem or other failure. Lots of minerals in the water, interference from another source etc. No reason to waste Propel or (battery juice for pumps) for a momentary glitch.

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        • turbobearcat
          Junior Member
          • Apr 2003
          • 404

          #5
          ]http://www.subcommittee.com/forum/icon_smile.gif

          Mark

          ]http://www.subcommittee.com/forum/icon_smile.gif[/img]

          Mark

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          • turbobearcat
            Junior Member
            • Apr 2003
            • 404

            #6
            Opps..that was not Tim !!

            Sorry...too

            Opps..that was not Tim !!

            Sorry...too early in the morning for me..


            Mark

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            • rpm
              Junior Member
              • Apr 2003
              • 57

              #7
              You can program PCM to

              You can program PCM to do anything on any channel when the signal is lost. What do you mean it will not surface the boat?

              I have used it with great success, just wondering why people would want to add another gizmo instead of PCM. One of my boats worked badly with plain FM, because there was so much electrical stuff inside, it would jump and jitter sometimes. PCM fixed that completely. I had everything isolated and capaciters etc, FM just would not run smoothly. My point is that the signal has more integrity in the first place with PCM.

              Not trying to knock what anyone is saying or using, just a discussion.

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