Telecast Adder TD161, Инструкция по эксплуатации

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Telecast Fiber Systems
Troubleshooting and Repair
Problems that you may encounter with the TD161 will be similar to those on the Adder
161 TX and RX. Refer to the Preventive Maintenance and Troubleshooting sections of
the Adder 161 System Instruction Manual for details.
For more troublshooting assistance, call the service department at Telecast Fiber
Systems, Inc. at 508-754-4858. To return a unit for repair, you must obtain a return
material authorization (RMA) number from Telecast service.
Accessory List
Accessories for the TD161 are the same as for the Adder 161. Refer to the Adder 161
System Instruction Manual for a list of parts that are available from Telecast Fiber
Systems.
Circuit Details
• As a demultiplexer, the Adder TD161 separates a selected contiguous pair of odd
and even channels from the multiplexed signal it receives from the fiber or coaxial
cable. It then converts the audio information back into analog signals.
• The fiber and coax inputs and outputs are identical regardless of the TD161 Output
Select switch setting.
• Both data channel outputs on the TD161 are always on and will output the data
stream on the input fiber or coaxial cable.
• Controls and status indicator lights are on the front panel. Inputs and outputs are
on the rear panel.
• The Data 1 and Data 2 outputs on the rear panel are always active, regardless of
the setting of the channel selector switch. Their outputs are exact replicas of the
respective inputs to the source Adder 161 TX.
• The TD161 does not detect or output the DATA 3 and DATA 4 channels on fiber
from the Adder 161 TX. These data connectors contain only switch closure
information; they do not carry digital data streams.
• The input circuits and output drivers on the TD161 are the same as those on the
Adder 161 TX.
• The output impedance of the audio channels is 30, fixed.
• The battery charger circuitry on the TD161 is the same as that on the Adder 161.
Refer to the Adder 161 System Instruction Manual for more information on the circuits
and schematics.
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