User's Manual

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22 UltraWAVE BTS Installation and Commissioning Guide, Release 6.5A

BNC Connector Cards

By placing a jumper between pins 1 and 2 of headers P4 (port 1) and P6 (port 2), the outer conductor of

the dual port BNC 75 Ohm E1 card is grounded. This adheres to the ITU G.703 specification, which

states that the receive coaxial pair must be floating, but with the option to ground.

The BTS is shipped with 4 jumpers in place which ground both the transmit and the receive coaxial pair.

It is mandatory that the transmit pair is grounded. However, whether the receive pair is grounded is

determined by the customer equipment to which the BSC is connected.

The configuration of these jumpers can be changed at this point.

Tools Required

• Phillips screwdriver

• Electrostatic wrist strap, provided with the BTS

Procedure

1 Place the supplied electrostatic wrist strap around your wrist. Attach the metallized tape of

the wrist strap to the closest ground, for example, to the chassis of the BTS.

2 Unscrew the 75 Ohm dual port E1 card from the chassis, and pull it halfway out.

3 Look for the four jumpers silk-screened P3, P4, P5, and P6, located next to the external

connectors on the dual port E1 card. See Figure 2-6

• A jumper connects pins 1 and 2 of P4 and P6. This ensures that the outer conductor is

grounded. It is mandatory that these jumpers be installed in this configuration.

• A jumper connects pins 1 and 2 of P3 and P5. Remove these jumpers if the receive

pair must be floating. Keep these jumpers installed if the receive pair is to be

grounded.

Figure 2-6 Placement of the Jumper for Ports P3-P6

IW272806

Jumper

Item No.0015

Jumper Position 1,2

For P3-P6

Receive

Transmit

Receive

Transmit