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
25
CATV
TV
BC
+100
CATV
ERROR
PWR/
GAIN
DUC864
35
CATV
TV
BC
+100
CATV
ERROR
PWR/
GAIN
DUC864
28
DDC864A
25
DRMM4
SIGNAL
ERROR
PWR/
SIGNAL
ERROR
PWR/
DDC864A
