3M Dynatel 965DSP: 0 to 300 V DC; 0 to 250 V AC; 0 to 110 mA; 0 to 900 MΩ
The 3M Dynatel 965DSP Subscriber Loop Analyzer is a microprocessor-controlled integrated test set that provide full-featured POTS and fundamental ISDN testing. The functions include fault location and repair verification on twisted-pair, quad and coaxial cable (utilizing capacitance bridge, resistance bridge and Time Domain Reflectometer (TDR) functions). The Dynatel 965DSP subscriber loop analyzer executes a wide range of individual tests, or performs automatic test routines as specified by the user to categorize and sectionalize problems.
Specific tests and measurements performed by the 965DSP include:
- Voltage – detects and measures the presence of exchange or foreign DC or AC voltages
- Tone – provides a test tone for conductor identification; user-selected tones from 1 to 40 kHz for transmission measurements
- Current – measures DC loop current
- Ohms – measures conductor and insulation resistance up to 1000 megohms
- Resistance fault location – displays distance to fault
- Opens – locates opens at distances up to 100,000 ft (30 km)
- Splits – locates splits on paired cable
- Ringer count – counts the number of ringers on a particular loop
- Load coil count – indicates the presence of load coils in loop circuit
- Wideband loss – loss measurements to 200 kHz for pre-qualifying ISDN and HDSL
- Loss – measures voice band loss
- Noise – measures noise metallic and noise to ground in dBrnc
- Longitudinal balance – provides active measurement of line balance
