10
HE-12/HE-4
Instruction Manual
Operating Controls and Indicators
1. Stereo Indicator -
Lit when video and stereo
audio are present.
2. Audio/Video
Ratio
Adjustment
-
Adjustment of the A/V Ratio is permitted
from approximately -17 dB (full clockwise
position) to approximately -10 dB (full
counterclockwise position) by rotating the
potentiometer.
3. Video Adjustment
- Adjustment of the Video Modulation Level is permitted by rotating the
potentiometer.
4. Video Over Modulation LED Indicator
5. Audio Adjustment
- Adjustment of the Audio Modulation Level is permitted by rotating the
potentiometer.
6. Audio Over Modulation LED Indicator
7. Up/Down Buttons
- Used to set the desired channel or mode.
8. +100 Indicator -
Lights when channel settings are 100 -135.
9. Channel ENT Button
- Enter button used to enter a desired channel or mode.
10. RF Level Adjustment
- Potentiometer adjustment used to set the output level. Has a range of
15 dB, optimum performance with a 10 dB adjustment.
11. Video Input
- “F” Connector
12. Right Stereo Audio In
- RCA Connector
13. Left Stereo Audio or Mono In
- RCA Connector
14. Power Connector
15. RF Output
- “F” Connector
Programming the Unit
The AMCM unit comes factory set to operate in the Standard CATV mode. The unit has 4 valid operating modes: STD CATV,
IRC, HRC & broadcast UHF/VHF. (Skip to the next section for programming the operating mode)
Programming a Channel
1. Navigate to the desired channel number by depressing the
p
UP and
q
DN buttons.
a. Continuous past 99 for channels 100-135, the +100 red LED will illuminate.
2. Press
ENTER
when you reach the desired channel setting. This will tune the modulator output to the corresponding
channel frequency for this entry.
a. The LED display will blink continuously during the channel programming process and will not change the output
frequency the unit is programmed until
ENTER
is depressed.
b. The unit has a special feature that alerts an operator of an inadvertent or desired change to the channel display by
flashing the LED readout. The LED display will continue to flash for 30 seconds if
ENTER
is not depressed and then
will return to the display of the previously programming channel entry setting.
It is strongly recommended to use the Blonder Tongue MIPS-12C or the MIRC-4D
power supplies with the AMCM-860. It is also recommended to use the optional
headend fan unit (QTHF, Stock No. 6235) when deploying more than 6 AMCM-
860 units in the MIRC-12V chassis. A rack space above and below the chassis unit
is suggested for heat dissipation and air flow.
7
1
2
9
3
4
6
STEREO
A/V
AUDIO
VIDEO
AMCM-860H
UP
DN
+100
ENT
CHANNEL
RF
Level
10
5
8
Rear Panel
Front Panel
VIDEO
IN
RF
OUT
P
O
W
E
R
11
14
13
12
STEREO
RIGHT
LEFT
MONO
15
AUDIO IN
AMCM
A/V
RF
Level
ENT
STEREO
860
AUD
7
1
10
+100
UP
DN
CH
VID
2
9
8
5
3
4
6
Front Panel
