On Fri, Sep 25, 2009 at 11:15:32AM -0400, Shane Ronan wrote: > Along these lines, but slightly off topic, what kind of light meters > do you guys use?
Search ebay for "optical power meter", you'll find any number of perfectly good 850/1310/1550 handheld meters for around $200. The hardest part is making sure the connector actually takes SC, rather than something less useful like ST or FC. You really can't go wrong with something like: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130333017553 Note that all light meters use wideband rx optics, and will receive and report a value for any color light you throw at them. The reason for the 850/1310/1550 selector is simply to "correct" the value picked up by the receiver, i.e. if you select 1310 but fire a 1550 signal at it the value reported will be higher than reality. Other than that, the only thing you need to know about a light meter is the difference between relative mode (measuring loss from a known fixed light source on the other end) and absolute mode (measuring the actual light received from any transmitter). If I had a nickle for every time a datacenter tech got confused between those two and told me I was transmitting +67dBm I'd be a very rich man (or own a very powerful laser). -- Richard A Steenbergen <r...@e-gerbil.net> http://www.e-gerbil.net/ras GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC) _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
