I will join the "An ohmmeter is not enough" crowd. You need a couple of devices.
Coax cable is actually a fairly complex electronic circuit,,, If it's pinched, the characteristics change, Your ohmmeter test (And by the way the terminating resistor can be any vale for a DC test) you will find shorts and opens, but how about a pinch, or a too-tight turn, or other issues that can cause a change in the electronic characteristics of the cable at RF but not at DC (and there are many).. And if it is a TRANSMITTING cable (HAM/CB) well.. Read on.
A Time Domain Reflectometer with the proper terminating resistor (in this case it must be the same as the coax) will find RF Faults. it will also identify where on the cable the fault is. .SO a cable that is pinched (Changing the ratio of conductor diamaters) or bent too tight (Forcing the solid center wire to get too close to the outer shield in TV coax) is quickly diagnosed.
And a device called a MEGGER (A very high voltage ohmeter) will find cables where the insulation has broken down so that the usually less than 10 volts of a standard ohmeter (And that only on the el-cheapo 9v square battery powered ones) may show them as good.. the MEGGER may well show 'em shorted as the voltage gets up to .. Well higher levels, and it arcs right through the insulatin.
Let's see e^2/52 = 5 so E=Sqrt(265) = a bit over 16 volts
e^2/52 = 100 in my case so sqrt() 72 volts (About) and this assumes a 1:1 SWR in both cases. Somewhere I have the figures for non 1:1 and it can get impressive.
