Solid SC-DAS, Installation And Operation Manual

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Confidential & Proprietary 37/117 SC ‐ DAS
Figure 4.12 – ODU Internal View
No. Unit Description Remark
1 DOU
Donor Optic Unit
Converts TX RF signals into optical signals;
Converts RX optical signals into RF signals;
Provides up to four optical ports per DOU
Max 2 ea.
2 2W
2Way Divider
Divides TX RF signals into two;
Combines two RX RF signals into one
3 DU
Distribution Unit
Distributes power and signals to DOU
4 Shelf 19” rack, 1RU
5 Accessories
25PIN DSUB, Male to female 1pcs
RF Coaxial Cable Assembly 2pcs
4.2.4
Sub Assembly description
1) Donor Optic Unit (DOU)
The DOU performs the RF to optical conversion of TX signals as well as the optical to RF conversion
of RX signals.
Using an optical splitter, this unit divides optical signals from a Laser Diode into four and then
distributes them to each optical port. With a total of four Photo Diodes in RX, the DOU performs the
optical to RF conversion of signals received from each optical port. In addition, the unit is equipped
with an ATT to compensate for optical loss in the fiber or fiber connectors.
Since is uses a WDM, it uses only one strand of fiber for each ROU it connects to.
With internal FSK modem, it will allow operation from a remote site.