DRAKE DDC864 Manual

TM
12 POSITION RACK MOUNT
DDC864 DUC864 DDC864 DUC864 DDC864 DUC864 DDC864
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 CATV BC CATV BC CATV BC CATV
+100 TV +100 TV +100 TV +100 TV +100 TV +100 TV +100
CATV CATV CATV CATV CATV CATV
GAIN GAIN GAIN
DDC864
DOWNCONVERTER
The R.L. Drake DDC864 is a low noise
downconverter designed for translating
digital signals from their off-air or CATV
channel to a 44 MHz IF output. The output of
the DDC864 can be connected to a DUC
series upconverter to place the digital signal
on a new output channel.
When the DDC864 is used with the DUC550
or DUC860, all input/output channel
combinations are usable except "on
channel" conversions.
When the DDC864 is used with the DUC864,
"on channel" conversions, (the same input
channel on the DCC and output channel on
the DUC) are acceptable.
TM is a trademark of the R.L. Drake Company
is a registered trademark of the R.L. Drake Company
Copyright 2006 R.L. Drake Company
DDC864 DIGITAL DOWNCONVERTER
POWER SUPPLY
DUC864
PS8
PWR/
ERROR PWR/
ERROR
SIGNAL
2 5 2 1
BC CATV BC
TV +100 TV
CATV CATV
GAIN
DRMM4
The DDC864 provides low noise figure and low
phase noise as well as a flat passband to
minimize signal deterioration.
The DDC864 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 QQP860 is
preferred for this task .
P/N: 3852391A-1-2006 Printed in the U.S.A.
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.
F2 - SIGNAL Indicator
Lights when a signal is present.
F3 - Channel Number Switch
Sets the desired operating channel for standard
CATV channels 02 through 135 or Broadcast
TV channels 02 through 69. See also Item F4
which sets the type of channel (CATV or
Broadcast TV) and sets the leading "1" for
CATV channels 100 through 135.
DDC864
PWR/
F1
ERROR
SIGNAL
F2
F3
2 5
CATV BC
+100 TV
CATV
F4
Figure 1
F4 - Mode Switch
Sets the type of channel, CATV or Broadcast
TV ("BC TV"). The "+100" position of the switch
sets a leading "1" for CATV channels 100
through 135. See also Item F3 for setting the
channel number.
For example:
Setting for CATV
channel "124"-
2 5
CATV BC
+100 TV
CATV
For example:
Setting for CATV
channel "75"-
7 5
CATV BC
+100 TV
CATV