HE 12 Series, Modular Agile Audio/Video Modulator
The AMCM-860 is a frequency-agile analog audio/video modulator available in NTSC channels 2-135 (54-860 MHz).
Models are available in both stereo and mono audio inputs. Mono Audio unit is notated by a "D" instead of a "DS" after the model number. This 4th generation of AMCM-860 is equipped with the CALMTones feature, utilizing Audio AGC (Automatic Gain Control) circuitry that eliminates variations in loudness level that may be present among various program sources.