I never heard back from Alpha Delta but it seems like they forgot to list the specs for the 75Ohm version and treating the 75Ohm as a 50Ohm model.
I e-mailed Jim at Jim's Cable World asking him if the cables were 3Ghz or 2.3Ghz and this is his response so according to him, RF cable for what we are using it for has the signal on the shield and not the actual conductor itself as this was his response and he no longer sells 2.3Ghz cable.
"I no longer carry 3 GHz cable since I only use the number one cable brand in the world which is Commscope, and also the brand used most cable and dish companies. Even though Commscope specs are tested at 2300 MHz, you could take a cable that is listed as 1000 MHz and it still should pass the 3 GHz test since your cable serves as signal transport agent, not to mention that when your signal hits the 1000 or 2000 MHz splitter, it will not allow more than 1000 or 2000 MHz through the cable anyhow.
In conclusion the term tested to 3 GHz is similar to the Chinese selling scams of monster cables, monster speaker wires and other monster everything else that were so popular in the 90's. It didn't take long for consumers to realize that they were paying up to four times as much for a cable that had the same, and many times inferior quality. Another example of Chinese products scams are the 'Gold' series splitters and connectors. If anyone thinks they are getting an actual gold plated splitter for under five bucks, apparently they haven't checked the gold prices lately. The only nice thing about 'Gold' splitters is that you don't have to recycle them because they are usually made of cheap plastic with gold paint.
When purchasing cable what you really want to look for is the quality of the cable jacket since signal travels around the outside of the cable, not through cable so whether it is solid copper of copper clad, it doesn't matter other than copper corrodes easier, so the lifetime of copper clad cables exceeds solid copper cables. As for sheilding, cables come in a range from Single-Shield, Dual-Shield, Tri-Shield and Quad-Shield. I would not recommend Single-Shield cable since there is very little shielding and even something as simple as a garage door opener or the spark plugs in your car running outside could cause interference. Dual-Shield is ok and also the choice of some Satellite companies, but they can get away with less shielding because most of their signal is transferred on the higher frequency spectrum, and personally I recommend Tri-Shield over Quad-Shield. Why Tri-Shield over Quad-Shield? It's a well known fact in the cable and satellite industry that Tri-Shield outperforms Quad-Shield due to Tri-Shields one braid shielding system with a higher percentage of braid than Quad-Shields two layers of shielding with the same percentage braid count. So the bottom line is you get approximately the same amount of braid coverage with both the Tri-Shield and the Quad-Shield and the foil layers are exactly the same. The big difference that makes the Tri-Shield better than the Quad-Shield is that the Tri-Shield is a tighter woven ribbed, one shielded cable where the Quad-shield has a looser jacket due to its two thinner layers of braid, which in return causes the cable jacket to be more spongy, creating poor connection seals which can cause problems with signal leakage, poor picture quality and signal packet loss. Also with a looser jacket, overtime weather and bends in the cable will cause the Quad-Shield cable to become out of round and cause tiling and packet loss, since the signal can't flow consistently down the center conductor when the jacket is out of round. Tri-Shield eliminates these problems, making Tri-Shield the cable of choice with most major cable companies and dish networks."
