I agree, the 4000 is a good OTDR, but they are a bit bulky by todays standards. The AFL/Noyes units are smaller and very reliable, roughly $6K +/- (new) depending on options. Also, I have a couple of OWL OTDR's (Optical Wavelength Labs) that I use for backups. I have had them over a year and have been very pleased with them. No issues, very compact and actually pretty rugged. You can get the SM & MM package for well under $4K new. Happy shopping
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