User's Manual

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2.1 HROU (High power Remote Optic Unit)
HROU consists of two unit, one is HMRU(High power Main Remote Unit) and the other is HARU(High
power Add-on Remote Unit).
The biggest difference between HMRU and HARU is whether R-OPTIC module exist or not in the enclosure.
HMRU receives TX optical signals from ODU and converts them into RF signals. The converted RF signals
are amplified through High Power Amp in a corresponding HRDU band combined with UDCU, PAU and
Cavity duplexer, and then radiated to the antenna port.
When receiving RX signals through the antenna port, this unit filters out-of-band signals in a
corresponding HRDU and sends the results to R-OPTIC to make electronic-optical conversion of them.
After converted, the signals are sent to a upper device of ODU. HMRU can be equipped with up to four
HRDUs (High Remote Drive Unit) and the module supports single band only.
HARU receives TX RF signal from HMRU and amplifies through High Power Amp in a corresponding HRDU
combined with UDCU, PAU and Cavity duplexer, and then radiated to the CU(Combining Unit)
When receiving RX signals through the antenna port, HRDU filters out-of band signal in a corresponding
HRDU and sends the results to MHRU through RF cable.