Installation Manual

User Reference and Installation Manual 3-25

CarrierWave Digital Radio MK-MAN-01

6. When the installation is complete, test the iConductor

by going to the Windows Programs-

>CarrierComm->vX-XX->IC menu (or the appropriate menu or icon) and start the

iConductor

software.

3.7.2.2 Connecting the IDU to the PC and Power Source

Perform the following steps to ensure the IDU is powered up and connected to you PC:

1. To connect to the IDU DC power connector (located on the IDU rear panel), an IDU power

cable is required. A mating power cable connector (Phoenix Contact P/N 17 86 83 1) is

provided with the CarrierWave IDU for construction of this cable. This connector has screw

clamp terminals that accommodate 24 AWG to 12 AWG wire. The recommended wire size

for construction of power cables under 10 feet in length, supplying –48 V dc, is 18 AWG. The

opposite end of the IDU power cable should have a termination appropriate for the power

supply being used. The IDU power cable should be of sufficient length to avoid tension in the

cable and provide a service loop for connection, but not be of excessive length. Stranded

wire should be used over a solid conductor to reduce tension on the IDU DC Power

connector. Using the supplied power cable connector, pin 2 (labeled -V) should be connected

to the power supply terminal supplying –48 V dc, while pin 1 (labeled RET) should be

connected to the power supply return. Refer to Figure 3-15. Note that pin 1 (RET) of the IDU

DC Power connector is connected to the IDU chassis ground internal to the IDU. Use of a

power supply with an inappropriate ground reference may cause damage to the IDU and / or

the supply.

2. Connect the IDU power cable to the –48 V dc power supply, and place the voltmeter probes

on the unconnected IDU end of the power cable, with the positive voltmeter probe on pin 2

(-V) of the cable connector and the negative probe on pin 1(RET). The connector screw

terminal screw heads may be used as convenient monitor points. Refer to Figure 3-15.

3. Turn on the –48 V dc supply. Verify that the digital voltmeter reads between –44 V dc and –

52 V dc when monitoring the cable points specified above. Adjust the power supply output

voltage and/or change the connections at the power supply to achieve this reading.

4. With the negative voltmeter probe still on pin 1 (RET) of the power cable connector (and the

power supply still on), press the positive voltmeter probe to the IDU chassis and verify a

potential of zero volts between the IDU chassis and cable pin 1 (RET). If the measured

potential is not zero, the power supply may be grounded incorrectly and should not be used in

this condition with an IDU. Note that this measurement assumes that the IDU is installed and

properly grounded. If this is not the case, the same measurement can be made between

cable pin 1 (RET) and a convenient ground (such as an ac outlet third-wire ground).

5. Turn the –48 V dc supply off.

6. Plug the IDU power cable into the IDU rear panel DC Power connector (DC Input). Place the

voltmeter probes on the cable connector screw terminal screw heads as per step 2 above.

Refer to Figure 3-15. Note that the CarrierWave Digital Radio IDU does not have a power

on/off switch. When DC power is connected, the digital radio powers up and is operational.

There can be up to 200 mW of RF power present at the antenna port. The antenna should be

directed safely when power is applied.

7. Turn on the –48 V dc power supply, and verify that the reading on the digital voltmeter is as

specified in step 3 above.