CommScope ION-U L 7/8/85/17/19, Руководство пользователя

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2 Functional Description
MF0147A0A Page 17
2. Functional Description
In the Downlink (DL) path, the remote unit provides:

Optical to RF conversion of the input optical signal

Automatic Gain Control (AGC) of each converted signal to compensate for
optical losses

RF amplification of the converted RF signal for transmission while maintaining
a good signal-to-noise ratio

RF filtering to reject spurious emissions
In the Uplink (UL) path, the remote unit provides:

RF amplification to boost the signals received by the antennas to maintain a
good signal-to-noise ratio

RF filtering to reject spurious emissions

Automatic Level Control (ALC) to adjust the RF signal level to meet blocking
requirements

RF-to-optical conversion of the signal, which is convey to the output optical
port
2.1. SISO and MIMO Operation
The modular architecture of the ION-U 7/8/85/17/19 supports both SISO and MIMO
operation. MIMO operation is achieved by pairing two RUs.
The following figures show views of a single ION-U 7/8/85/17/19 remote unit for SISO
applications and two ION-U 7/8/85/17/19 remote units paired for MIMO applications.
figure 2-1 Remote unit, SISO figure 2-2 Remote unit, MIMO Two
units paired