scope:

This section deals with baseband measurements on simulated radio-relay systems and is concerned with those measurements which are not directly related to the particular type of signal actually being transmitted, e.g. frequency division multiplex (f.d.m.) telephony or television. The baseband measurements to be described are carried out typically at the modulator input and demodulator outpot ports, where these are accessible, and exclude auxiliary terminal equipment, such as pre-emphasis and de-emphasis networks, which are associated with a particular type of baseband signal.