DRAKE DDC864A Manuel
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DDC864A DIGITAL DOWNCONVERTER
TM
12 POSITION RACK MOUNT
DDC864A
DUC864
DDC864A
DUC864
DDC864A
DUC864
DDC864A
PWR/
PWR/
PWR/
ERROR
PWR/
ERROR
PWR/
ERROR
PWR/
ERROR
ERROR
ERROR
SIGNAL
SIGNAL
SIGNAL
2
5
2
1
2
5
2
1
2
5
2
1
CATV
BC
CATV
BC
CATV
BC
+100
TV
+100
TV
+100
TV
CATV
CATV
CATV
GAIN
GAIN
GAIN
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.
is a trademark of the R.L. Drake LLC
TM
is a registered trademark of the R.L. Drake LLC
Copyright 2008R.L. Drake LLC
POWER SUPPLY
DUC864
PS8
PWR/
ERROR
PWR/
ERROR
SIGNAL
2
5
2
1
CATV
BC
+100
TV
CATV
GAIN
DRMM4
The DDC864A provides low noise figure and low
phase noise as well as a flat passband to
minimize signal deterioration.
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.
.
P/N: 3852391B-9-2008
1
2
FRONT PANEL CONTROLS and INDICATORS
POWER SUPPLY
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.
DDC864A
PWR/
F1
ERROR
SIGNAL
F2
F3
2
5
Figure 1
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.