The 4935A transmission impairment measuring set is a rugged, portable test set that provides the basic analog tests to isolate faults and to qualify circuits for voice, data, and broadcast services. Measurements include level, frequency, circuit noise, noise-with-tone, signal-to-noise ratio and noise-to-ground. The 4935A measurements are compatible with the Bell (BSTR 41009) and IEEE (IEEE 743-1984) standards.

• Basic analog tests to isolate faults and to qualify circuits for voice, data, and broadcast service
• Compatible with the Bell standards (BSTR 41009) and IEEE standards (IEEE 743-1984)
• Measurement: Level, frequency, circuit noise, noise-with-tone, signal-to-noise ratio, 3-level impulse noise (quiet or tone), noise-to-ground, P/AR (option)
• Filters: C-message, 3 kHz flat, Program, 15 kHz flat, 50 kbit, 1010 Hz notch