Capable of testing and certifying multi-mode and single-mode applications, the Models FO600 and FO610 fiber-optic power meters measure over a 75 dB dynamic range with ±0.15 dB accuracy and 0.01 dB resolution. The FO600 measures from +5 dBm to -70 dBm, and the high-power FO610 measures from +25 dBM to -50 dBm.Both instruments can store up to 1,000 labeled data records, include a built-in calculator, and provide an RS-232 interface and Windows-compatible software. Their 2.5-mm universal fiber adapter accepts ST, SC, FC, DIN and E2000 fiber connectors. Prices start at $895. EXTECH INSTRUMENTS, Waltham, MA. (781) 890-7864.