User's Manual Part 1

ROI-S05748 SYSTEM CONFIGURATION AND CHARACTERISTICS
2-23
2.3 Interconnection between ODU and IDU
Table 2-8 IF Cable
No. Item Specification
1 Interconnection Single coaxial cable /50 ohms
2 Standard Type of Cable 5D-FB, 8D-FB (standard), 10D-FB
3 Signals IF signal, alarms, control, monitoring and power source
4 Maximum Cable Length 150 m (5D-FB)
300 m (8D-FB)
350 m (10D-FB)
5 Cable Equalization Automatic level equalization
6 Guaranteed temperature range −33°C to +50°C (workable : −40°C to +55°C)
Note 1 : In case of employing hitless protection, set each length
of two IF
cables same or the difference of their cable
length shall be less than 100 meters.
Note 2 : Salt damage (custom order)
In case of operating in the sea or around the coast area
(within 3 km from coastline), measure must be taken for
the ODU against salt damage. Please contact NEC for
the countermeasure.
Note 3 : Water Proof N type connector
The waterproof N type connectors must be used for IF
cable of ODU side, because DC voltage power is
supplied in it.
Note 4 : IDU IF connector = TNC (Female),
ODU IF connector = N (Female)
Note 5 : TNC (Male) L-angle connector
for the 8D-FB IF cable
is used to connect it to the IDU. When the N (Male)
straight connector is attached to the 5D-FB or 10D-FB
IF cable, the TNC (Male) - N (Female) L-angle adapter
is used.