DRAKE DDC864A Manuals

DDC864A DIGITAL DOWNCONVERTER 1 TM 12 POSITION RACK MOUNT POWER SUPPLY DDC864A DOWNCONVERTER The R.L. Drake DDC864A is a low noise downconverter designed for translating digital ATSC, 8VSB signals from their off-air channel to a 44 MHz IF output. The output of the DDC864A can be connected to a DUC series upconverter to place the digital signal on a new output channel. When the DDC864A is used with the DUC864, "on channel" conversions, (the same input channel on the DCC and output channel on the DUC) are acceptable. The DDC864A is optimized for use with ATSC 8VSB modulation in a 6 MHz wide channel assignment. The passband is designed for optimized operation with 8VSB signals in an adjacent channel environment. For translation of QAM signals, the Drake model DQT1000 is preferred for this task. The DDC864A provides low noise figure and low phase noise as well as a flat passband to minimize signal deterioration. . TM is a trademark of the R.L. Drake LLC is a registered trademark of the R.L. Drake LLC Copyright 2008R.L. Drake LLC P/N: 3852391B-9-2008 2 FRONT PANEL CONTROLS and INDICATORS F1 F2 F3 Figure 1 F1 - POWER/ERROR Indicator Lights when the unit is connected to the required source of DC power via the rear panel DC INPUT connector. A flashing condition indicates an invalid channel setting or other conditions that would cause the unit to operate on an invalid channel. The RF output is switched off for flashing (ERROR) conditions. F2 - SIGNAL Indicator Lights when a signal is present. F3 - Channel Number Switch Sets the desired operating channel for standard Broadcast TV channels 02 through 69. DDC864A PWR/ ERROR 2 5 SIGNAL PS8 POWER SUPPLY DUC864 GAIN PWR/ ERROR CATV +100 BC TV CATV 2 1 DDC864A PWR/ ERROR 2 5 SIGNAL DUC864 GAIN PWR/ ERROR CATV +100 BC TV CATV 2 1 DDC864A PWR/ ERROR 2 5 SIGNAL DUC864 GAIN PWR/ ERROR CATV +100 BC TV CATV 2 1 DDC864A PWR/ ERROR 2 5 SIGNAL DUC864 GAIN PWR/ ERROR CATV +100 BC TV CATV 2 1 DDC864A PWR/ ERROR 2 5 SIGNAL 2 5 CATV TV BC +100 CATV ERROR PWR/ GAIN DUC864 3 5 CATV TV BC +100 CATV ERROR PWR/ GAIN DUC864 2 8 DDC864A 2 5 DRMM4 SIGNAL ERROR PWR/ SIGNAL ERROR PWR/ DDC864A