User's Manual

3. Functional Description
MF0200A5C_ION-U_L_7_80-85_17EP_19P.docx Manual for ION
®
-U Page 17
3. Functional Description
3.1. General
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