Motorola BLE100 - Manual (Page 35)

3-14 Amplifier Setup
BLE100 Installation and Operation Manual
Return levels used for alignment are not necessarily operational system levels. These levels
vary from system to system due to differences in equipment, architectures and design
philosophies. For an in-depth analysis and discussion of the return path, refer to Motorola
reference guide Return Path Level Selection, Setup and Alignment Procedure.
Powering and Surge Protection
In conventional applications, the BLE100s are powered through the input port.
CAUTION!
To avoid damage to the hybrids, it is recommended that you remove the input pad (JXP-IN) before you apply power to
the BLE100.
A 20-ampere, blade-type fuse is furnished in the amplifier module and provides overcurrent
protection for AC power applied to the input. You can power the BLE100 from the output
without passing power through to the input port. To block power from the input port, remove
the power-block jumper illustrated in Figure 2-8.
WARNING!
To avoid possible injury to personnel or damage to the equipment, remove 60/90 volt ac power from the system
before you remove any components from the housing.
The BLE100 is shipped from the factory configured for 38 through 90 VAC powering as
described in Section 2, “Overview”. To configure the BLE100 for 55 VAC through 90 VAC
operation:
1 Remove the electronics chassis from the housing.
2 Remove the power-supply cover.
3 Move the LO / HI selector (jumper J1 on the power-supply board) from the LO to HI position.
Figure 2-6 illustrates the jumper location.
4 Re-install the power-supply cover and torque the screws to 10 to 12 in-lbs.
5 Re-install the electronics chassis in the housing and torque the hold-down bolts to 18 to
22 in-lbs.