The transmitter frequency range is from 200Hz to 3950Hz with a resolution of 1Hz.
The transmitter level range is from +10 dBm to -40 dBm with a resolution of 0.1 dBm.
The receiver frequency range covers 200Hz to 4100Hz with a resolution of 1Hz.
The receiver level range is from +10 dBm to -69.9 dBm with a resolution of 0.1 dBm. The transmitter impedances are 600-ohms and 900-ohms nominal.
The receiver terminating impedances are 600-ohms and 900-ohms.
This unit comes with weighting filters C-message or 3kHz flat, and notch filter (>50 dB rejection from 995Hz to 1025Hz).
The impulse noise threshold range is from 30 dBrn to 109 dBrn

The Agilent HP 4944A Transmission Impairment Measuring Set (TIMS) measures analog parameters on voice bandwidth data circuits.

This unit tests loss, message circuit noise, noise-with-tone, signal-to-noise ratio, impulse noise, envelope delay distortion, and nonlinear distortion tariffed for C- and D-conditioned leased data lines. The Agile