The CL-SIP328 contains a triple varactor-tuned FM receiver with digital display. The highly sensitive, high quality training unit teaches the principles of FM reception. A quadrature detector and signal level indicator is included, along with a pair of 2-W output audio amplifiers. The receiver has a sensitivity of 6 μV. A center tuning meter and stereo indicator are included.

A bank of 12 malfunction DIP switches provides for fault insertion. The panel is reversible, enabling the student to work from the reverse side during troubleshooting. The audio output of the receiver is designed to feed 8-Ω loudspeakers. The course provides for 40 hours of instruction.