20
HE-12/HE-4
Instruction Manual
Setting Up the Units
1. Place each of the units into the appropriate Blonder Tongue Micromodular chassis by sliding the unit into the
retaining rails.
a. It is recommended to physically place one Downconverter and one Upconverter next to one
another in the chassis.
2. Connect the digital or HDTV signal (8VSb format) to the RF ‘F’ connector on the DHDC-D unit.
3. Connect the IF ‘F’ connector of the DHDC-D to the IF ‘F’ connector of the DHDC-U.
4. Connect the RF ‘F’ connector of the DHDC-U to the appropriate combining device.
5. Connect each unit to the power supply using one of the power supply cables.
Programming the Unit
The DHDC-D unit is intended to accept any digital UHF or VHF signal and convert it to IF. The DHDC-U unit is intended to
accept any digital IF signal and process it to any channel from 54-864 MHz. The unit has 4 valid operating modes, STD CATV,
IRC, HRC & broadcast UHF/VHF. It comes factory set to operate in Standard CATV Mode. If you wish to change the operating
mode skip to the Operating Mode Selection section.
Programming the DHDC-D
1. Navigate to the desired channel number by depressing the CH
p
UP and
q
DN buttons.
a. Press and hold the CH
p
UP or
q
DN arrow button for fast scrolling.
2. Press the ENTER button when you reach the desired channel setting. This will tune the downconverter input to the
corresponding frequency for this entry.
a. The LED display will blink continuously during the channel programming process and will not change the channel
until the ENTER button is depressed.
b. The unit has a special feature that alerts an operator of an inadvertent or desired change to the unit by flashing
LED readout. The LED will continue to flash for 30 seconds if the ENTER button is not depressed and if no
additional entries are made then the readout will return to the display of the previously programmed channel
entry setting.
Programming the DHDC-U
The DHDC-U 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 (see the operating mode selection section for programming information).
Programming a Channel
1. Navigate to the desired channel number by depressing the CH
p
UP and
q
DN buttons.
a. Continue past 99 for channels 100-135, the +100 LED will illuminate.
b. Press and hold the CH
p
UP or
q
DN arrow button for fast scrolling.
2. Press the ENTER button when you reach the desired channel setting. This will tune the upconverter output to the
corresponding frequency for this entry.
a. The LED display will blink continuously during the channel programming process and will not change the output
channel until the ENTER button is depressed.
b. The unit has a special feature that alerts an operator of an inadvertent or desired change to the unit by flashing
LED readout. The LED will continue to flash for 30 seconds if the ENTER button is not depressed and if no
additional entries are made then the readout will return to the display of the previously programmed channel
entry setting.
