The only problem we had sweeping to 865 Mhz was from the connectors and splicers that think the engineers are stupid. The LRC connector has a plastic sleeve instead of a metal one, this helps reduce the amount of reflection caused by the connector. As for the individuals that are telling you to use a torch, this changes the properties of the metals in the center conductor, if one scrapes the dielectric off with ones thumb you get oils and acids from your hands on the cener conductor and jump start the corrosive process. The biggest problem with sweep at higher frequencies is in the splicing, proper installation of connectors especially the length of the pin, all the pins must be cut to the same length, many manufactuers will precut and polish the pins for you. If the pins are differant lengths it will cause an impedance mismatch which is very difficult to sweep past, and you end up resplicing to the proper specs anyway. So save yourselves some time and reduce the number of short cuts, you'll make more money in the long run or you will get a reputation as a hack.
>Are any of you splicers or sweepers having trouble sweeping at 860 mhz QR-type cable? Here in the Charter system, if we do not clean the fine mylar film away from the inside of the outer aluminum jacket, it won't sweep. We are having to use small screwdrivers which have been partially sharpened to help move it back out of the way. The coring tools do not remove this fine film. We have tried various coring tools. Once in a while, one might remove the mylar. Most of the time, it doesn't. It surely is slowing us splicers down. We understand from one sweeper that there is not a problem until after it passes 800 mhz. Would like some feedback on possible solution other than what we are doing.
Re:Sweeping at 860 and QR cable
Member #: 13444
Registered: 1996-2001
Posted:
1616
Name:
Brian Farmer
Name:
Brian Farmer
Company:
Wave
Occupation:
Other duties as assigned
Location:
Where ever they need me
Personal:
Experience:
~40 years
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