8
HE-12/HE-4
Instruction Manual
AMCM-860B MHz Agile Micro Modulator
Description
The AMCM-860B is a professional quality agile audio/video modulator with an output frequency
range of 54-860 MHz. It joins Blonder Tongue’s impressive family of modular headend components
and works in conjunction with the MIRC-4D and MIRC-12V rack chassis, MIRC-4CUBE-CH and MIPS-
12C power supply.
The unit provides a modulated aural & visual carrier on any channel in the 54 to 860 MHz range.
Frequency plans including Standard CATV, IRC, HRC and broadcast are accommodated via front
panel selection. Channel tuning is easily accomplished with the use of front panel switches following
the entry instructions. All channels with appropriate FCC offsets are pre-programmed and tuned
electronically via microprocessor.
Features
• Supports all broadcast and CATV channels, including HRC and IRC assignments from 54 to 860 MHz.
• Meets FCC docket 21006 aeronautical frequency response offset requirements
• Front panel access to all level controls and indicators
• Integrated stereo encoder available
• Die-cast chassis offers superior RFI protection
The AMCM-860 dissipates twice the wattage in comparison to other Blonder Tongue HE-12 modulators
and demodulators. Due to this wattage increase, care must be taken when installing AMCM-860’s
into an existing MIRC-12 configured with MIPS-12 power supplies (Stock No. 7722 or 7722B). These
power supplies can only support one (1) AMCM-860. Installing more than one AMCM-860 will cause
the power supply to fail. Should two (2) or more AMCM’s be required, the power supply must be
changed to the new MIPS-12C (Stock #7722C) power supply. The “C” version power supply can easily
be identified by the presence of fan vents on the front panel.
A further enhancement to our HE Series product line is the MIRC-12V (Stock #7715) chassis. It is
designed to provide increased ventilation for improved heat dissipation.
