User manual

DTS Broadcast PDH Microwave Digital Radio User Manual
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4.7 IDU Installation
The IDU requires only 1RU of vertical rack space and 254 mm rack depth. No space above or
below the IDU is required for ventilation purposes. IDUs may be stacked adjacently in racks. The
connections of 4/8/16E1 (75ohm unbalanced) IDU are descripted in Figure 4-4. The deffrents between
diffrent service-type connections only are main services; refer to service card descriptions in section 1.
Figure 4-5 Connectors of IDU for 4/8/16E1 75ohm unbalanced Service card
IDU Installation Procedure
Step 1. Position the IDU as required in the equipment rack.
Step 2.Lay in, secure with cable ties and terminate ground cable.
Step 3. Tighten the TNC connector on the IDU “ODU” connectors.
Step 4. Install tributary data signal cables on the IDU “TRIB” connectors. Use 75ohm CC4 male
connectors and CC4-8G or CC4-16G connectors for 4/8/16E1 unbalanced systems, RJ-45 plugs for
4/8/16E1 balanced systems and 10/100BASE-T system. Refer to the Table 4-4 for RJ-45 and DB37
wiring details.
Step 5. If required, install alarm relay wiring to female DB15 connector on IDU front panel. Refer
to the Table 4-3.
Step 6. If required, install auxally data wiring to RJ-45 connector on IDU front panel. Refer to the
Table 5-3.
Step 5. Install phone wiring to RJ-11 phone connector on IDU front panel.
Step 8. The L54 requires DC power -48V ( -40VDC ~ -60VDC) via a 2-pin connector. Ensure
that the plug provided in the installation kit is wired as detailed in table 5-3. Recommend use of 1.5mm
2 conductor wire. Make sure power is off before power on the device.