Drake DUC864A Digital Up-Converter - Manual (Page 5)

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1. Place the units into the appropriate Drake micro-modular chassis by sliding the unit into the retaining rails.
a. It is recommended to physically place one Down-converter and one up-converter next to one another in the chassis,
if applicable in your installation.
2. Connect the IF source, typically from a DDC864A down-converter to the IF ‘F’ connector of the DUC864A.
3. Connect the RF ‘F’ connector of the DUC864A to the appropriate combining device.
4. Connect to the power supply using one of the power supply cables.
Setting Up the Unit
The DUC864A 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 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 up-converter 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.
PROGRAMMING RF LEVEL
1. Depress the RF Level p UP or q DN buttons to increment or decrement the RF output level to the desired setting.
a. The unit has a specified adjustment range of +35 dBmV to +45 dBmV output. The unit software however, will permit
entries from +33 to +47 dBmV, the out of range entries of 33-34 & 46-47 dBmV are meant for usage to correct any
display error, allowing the unit to be operated in the specified range.
ATTENTION: It is also recommended to set the output level to +45 dBmV for optimum noise performance and externally
attenuate down to a desired level.
2. Press the ENTER button when you reach the desired channel setting. This will tune the up-converter output to the
corresponding frequency for this entry.
a. The LED display readout will also flash continuously during the RF Level programming process. The LED display
will continue to flash for 30 seconds if the ENTER button is not depressed and then will return to the display of the
previously programmed channel entry setting.
Programming the Unit