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Product introduction:In the MDAS system, the access unit (AU) coupled the downlink rf signals from DCS, WCDMA and LTE sources into the optical fiber distribution system, converted them into digital signals for framing, and then transmitted them to the extended unit through optical fiber after being converted into optical signals through optoelectronics. At the same time, the optical signal uploaded by the extension unit is converted into a digital signal for de-framing, and then converted into an uplink rf signal and transmitted to the source.

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