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Coaxial Cable tester

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James Johnston
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Hello,

Would anyone have a good recommendation for and industrial grade cable tester for GNSS coaxial cables (base and radio).

Looking to test:

Continuity / Resistance

Would prefer a tester designed in away that the cable being tested is screwed in on both ends - To replicate the actual way the cable is used in the field - screwed in (not clipped in).

Thank you,

Georges


 
Posted : January 8, 2015 1:31 pm
bill93
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You can test continuity/resistance with $5 Harbor Freight multimeter, although you either have to hold probes on the cable ends or else build yourself a fixture with mating connectors.

But there's a lot that can be wrong with a cable at GNSS frequencies besides continuity. If a cable gets badly kinked it will have internal reflections of the signal that degrade signal quality.


 
Posted : January 8, 2015 3:37 pm
rfc
 rfc
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> But there's a lot that can be wrong with a cable at GNSS frequencies besides continuity. If a cable gets badly kinked it will have internal reflections of the signal that degrade signal quality.

Absolutely correct. To measure the IMPEDANCE of the cable, and whether any crushing or bending of the cable has affected its transmissivity, you need more equipment than the average surveyor is likely to have laying around (i.e. a pulse generator and a scope).

With any RF cables operating at these frequencies, the best course of action is always: if in doubt, replace the cable.


 
Posted : January 8, 2015 3:59 pm
a-harris
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You need to talk with someone in the ham radio organization and/or CB radio end of things.

They have the testers and know what to look for about cables.

I had a cable that was damaged and I repaired it and wrapped with electrical tape and then did a resistance test of all my cables and they were in the same range, it appears good to go for me.

B-)


 
Posted : January 8, 2015 6:21 pm