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How to test TV cables and amplifiers with a multimeter for signal integrity

Cy59 -  
Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   -
Hello,

I no longer receive TNT, no signal. Antenna on the roof
With a multimeter
How can I test
- if the cable is cut, the other end is on the roof
- the power supply of the 24v amplifier in the living room, fuse ok
Is there a voltage to measure on the output plug that goes to the TV
Is it 24v on the central wire+ and the metal mesh outside?..

Or another way to test the antenna inaccessible on the roof

Thank you

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3 answers

  1. Cy59
     
    I wanted to test the wire with an ohmmeter, but it's impossible as the other end is connected to the antenna. To see if I have a return

    So there's no return current on the plug going to the TV to check if the amplifier on the antenna is dead
    I can't therefore test the power supply going to the antenna?
    7
    1. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 208
       
      But you can test at the output of the power supply.
      0