+ Reply to Thread
Results 1 to 5 of 5

Thread: DiAEqC switch problem

  1. #1
    Senior Member
    Join Date
    Dec 2015
    Location
    Christchurch
    Posts
    546

    Default DiAEqC switch problem

    Hi All

    I was going nuts with a fault on a two dish / two receiver set up.
    The DiSEqC 22kHz switch commands were passing to the other unit, signals were mixed up etc.

    I found the problem.
    The cheap DiSEqC 1.0 two port switches were only switching power, while still passing signal through.

    This means that with the second dish / LNB powered from the second receiver, the signals were active and were passing through the 2 port switch.
    The switch was acting like a splitter.

    This would not pose a problem with only one receiver as only one LNB would be powered on.

    Drove me nuts. Brand new switches fresh out of the box.
    Brought them from "mike485" on Trademe.

    Click image for larger version

Name:	TwoPortSw.JPG
Views:	55
Size:	24.5 KB
ID:	479

    Owen

  2. #2
    Senior Member
    Join Date
    Nov 2007
    Location
    Hawkes bay
    Posts
    630

    Default

    See those nasty switch es have only 1 signal diode per leg
    3 would give far better isolation
    Check if power is coming out of both legs means shorted transistor driving each leg

  3. #3
    Senior Member
    Join Date
    Dec 2015
    Location
    Christchurch
    Posts
    546

    Default

    No there is no short, its just the signal passes through.

  4. #4
    Senior Member
    Join Date
    Nov 2007
    Location
    Hawkes bay
    Posts
    630

    Default

    Any short will be internal causing both signal diodes to both be on rather than one at a time

  5. #5
    Senior Member
    Join Date
    Dec 2015
    Location
    Christchurch
    Posts
    546

    Default

    Yes I know that, I tried three new switches and all did it.

    I thought it was a burnt out diode due to there having been a short on that port, but no power passes through the non "ON" port.

    Just crappy switches.

    Owen

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts