Keysight-Agilent 4935A

The 4935A Transmission Impairment Measuring Set tests circuits for faults and qualifies circuits for voice, data, and broadcast service. In addition, with its 110kHz bandwidth, it performs the required tests to qualify the local loop for Digital Data Systems (DDS) up to 56 kbps. The 4935A performs measurements compatible with the Bell standards (BSTR 41009) and IEEE standards (IEEE 743-1984). The 4935A measures for level, frequency, circuit noise, noise-with-tone, signal-to-noise ratio, 3 level impulse noise (with tone), and noise-to-ground.