Standing waves are impedance mismatches usually caused by damaged cable. A cable gets it's impedance from the ratio between the center conductor and the sheath. 75 ohms is used for cable tv, if the cable is damaged it changes the ratio between the sheath and the center conductor and that will change the ohms from 75 to ....whatever. The best way to find the problem is to sweep it....I know that everyone dosen't have a sweep meter if you have a meter that will scan the entire spectrum that is almost as good as a sweep meter...go back to a point where you have a flat response then find the first place where you have standing waves....The problem is between thoes two points...Also Taps, Actives and just about anything can cause standing waves.......most of the time I have found it to be cable.
> I could really use some pointers in troubleshooting standing wave on an active system (large cascades 450 system, many thanks in advance.
Re: standing wave
Member #: 6608
Registered: 1996-2001
Posted:
101
Name:
Darryl Thomas
Name:
Darryl Thomas
Occupation:
Sweep Supervisor
Location:
Orlando, Florida
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