British Telecom


Oscillator 87J

Operating Mode

Output Transformer Configuration
Used for tracing wire pairs.
The cable pair is connected across the output transformer.

Single Ended Configuration
Use for tracing cables
One output is connected to the cable the other is connected to ground.

DIS Configuration
Allows pair tracing while connected to the exchange without drawing current.
A DC blocked connection is made via an internal capacitor

Short Circuit Detection
An LED lights to indicate a short circuit on a cable pair up to 2km long


User Guide