The ME446B is a compact test set which consists of the MG442A Synthesized Level Generator and the ML424B Level Meter.
The MG442A has a superior output level accuracy of within ±0.2 dB including all the frequency characteristics, step accuracy of the attenuator, temperature stability, etc. Output level can be varied in fine steps of 0.1 dB. For this reason, the test set is capable of end-to-end tests of transmission lines by matching the dials of frequency and level without adjustment of the transmitting level. The
ML424B is capable of measuring the level of a signal or noise with high accuracy. The frequency range is wide, from 30 Hz to 150 kHz at 600 Ω balanced input impedance, from 4 to 650 kHz at 75 Ω and 150 Ω balanced, and from 10 Hz to 20 MHz at 75 Ω unbalanced, so that apparatus and transmission lines from the voice frequency band to the carrier frequency band up to 3600 channels can be tested. The ME446B allows both efficient and economical maintenance of multichannel communication systems.