17
HE-12/HE-4
Instruction Manual
MIDM-806C Demodulators
Description
The MIDM-806C is a professional quality single channel, agile audio/video demodulator. It provides an A/V output
from any VHF, UHF or CATV channel (54-806 MHz) and is designed for use in the blonder Tongue Modular Headend
System. The MIDM-806C demodulator and an MICM/AMCM modulator can be paired to perform off-air channel
processing or to cherry pick cable channels.
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Note: A MIPS-12C, (Stock #7722C) Power Supply is required for full chassis deployment.
The MIDM-806C can demodulate any single broadcast or CATV, VHF & UHF channel in the 54 to 806 MHz frequency
range. It is ideal for off-air signal processing (audio/video processing and remodulation) and CATV cherry picking
applications.
The MIDM-806C series features rock solid, phase lock loop (PLL) synthesized frequency control. Agile frequency
selection is accomplished via front panel channel up/down buttons with a LED channel readout for easy on-the-fly
channel changes. A channel lockout mode is also provided to prevent accidental channel changes. Non-volatile
memory maintains the programmed channel selection in case of power loss. All MIDM series units are compatible
with any modulators requiring a baseband input, and can be used in any combination with the MIPS-12C power
supply in a MIRC-12V chassis.
Specifications MIDM-806C (Typical)
RF
Frequency: Range:
54-806 MHz, VHF, UHF, CATV (Std., IRC, HRC)
Input Lev el Range: -5 to +30 dbm VHF/UHF,
+2 to +12 dbmV (CATV)
Noise Figure: 8 db
Image Rejection: VHF 60 db
Input Impedance: 75 ohm
Video
Output Lev el: 1.0 V p-p
Output Impedance: 75 ohm
Audio
Output Lev el: 1 Vp-p
Output Impedance: 600 ohm, unbalanced
General
Power Re quire ments - External:
+12 VDC @ 140 mA, 5 VDC @ 150 mA
Temperature Range: 0° to +50° C
Mechanical
Dimensions (W x H x D): 1.0 x 3.5 x 7.5 inches
Weight: 1.2 lbs (0.56 kg)
Connectors/Impedance
Audio Out put: RCA Phono, fe male
Video Output: 75 ohm “F” type, fe male
RF In put: 75 ohm “F” type, female
Power: Locking Header, 3 pin
Controls
Channel Selection: Push buttons
ANT/CATV: Push button
Power On/OFF: Push button
Channel Lock: Push button
Audio Level: Pot
Video Level: Pot
Indicators
Channel: 2 digit, 7 segment LED
