User's Manual

3CC12426AAAA TQ BJA 01 Issue 01 - April 2001 - Draft 04 51/346
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To connect the surge protector ground wire
1. Measure a length of insulated copper wire that is long enough to run from the closest safety ground
point to the surge protector.
2. Add a ring lug to one end of the ground wire, and connect it to the surge protector, as shown in Figure
21.
Figure 21 – Surge protector ground connection
3. Connect the unconnected end of the ground wire to the building ground.
2.6.1 – Replacing the gas discharge tube in a surge protector
The gas discharge tube should be replaced by qualified service personnel on a regular basis as
recommended by the manufacturer, using an exact replacement from the original manufacturer. The
surge protector carries –48 V dc that must be turned off before replacement.
To replace the gas discharge tube
1. Remove the dc power to the surge protector at the power source. Do not remove power by
disconnecting the BNC connector on the Bias-T power cable because reconnecting live dc voltage
can cause sparking and damage the connector.
2. Disconnect the Bias-T power cable and remove the surge protector from the Bias-T.
3. Remove the screw cap (see Figure 22) and the gas discharge tube. Inspect the surge protector for
damage. If there is damage, replace the surge protector and proceed to step 5; if not, proceed to
Danger - Do not replace the gas discharge tube during storm activity.
Warning - If dc power is not disconnected at the dc power supply, sparking may occur when
connecting any connector in the dc voltage path (surge protector, Bias-T, IF cable, X-Pol
RBS Tx/X-Pol RBS Rx) when the connector has dc voltage on it. Sparking may damage the
connector and affect service quality.
Ring lug
Surge protector
Washer
Ground screw
Ground wire