Telecast Adder 162 User Manual page 36

+13.8 VDC to +18 VDC
Front Panel,
Power
Connector
The optical output is generated from a high power Lased Diode coupled to the fiber. User
connections are made at a bulkhead type ST connector on the front panel of the assembly.
Transmission cable must be matched to the fiber pigtail type specified at the time of
manufacture.
The input uses a PIN Photodiode and amplifier to convert the optical signal back into an
electrical signal.
A high capacity Ni-Cad rechargeable battery pack is mounted to the top cover for easy
accessibility. Replace this battery pack approximately every two years or as required.
Replacement battery packs are available from Telecast. Dispose of batteries in accordance with
local regulations.
1. Move the power switch to OFF.
2. Remove the ten screws holding the top cover.
3. Remove the four screws holding the battery bracket.
4. Disconnect the battery and replace it.
5. Replace the bracket and cover.
The battery is connected to the main system board via a polarized 2-pin connector, and is
secured by a bracket and four screws.
With a full charge, this battery will operate Model 162 for 30 minutes and Model 322 for 15
minutes. Operation time varies with module complement in the assembly.
The following accessories are available from Telecast:
1. Optical power meter kit
2. Cable repair kit with Quick-crimp kit to attach ST connectors to fiber optic cable
3. Loop-back cable to localize signals during installation test
4. Prefabricated cables built to custom lengths
Charge
Control
4
Circuit
DC INPUT
1
Figure 36: Battery Charger Block Diagram
Front Panel
Power Switch
Power to
Electronics
Switch
Internal
Mode
Battery
Power
Front
Panel
External
Power
LED
Internal
Reserve
LED
36