The PROLINK-4 Premium with B&W CRT with 5" LCD/TFT incorporate functions to determine the quality of both analogue and digital signals.

For analogue signals Level, Video/Audio, Carrier/Noise measurements are available.

In the case of digital signals they measure Channel Power, Carrier/Noise, Bit Error Rate (BER) with DVB Channel Identification as well as MPEG-2 decoding and wrong packet detection.

Optionally they can decode channels encrypted with some conditional access systems via the common interface.