
PW R/
ERRO R
+100 TV
CATV
GAIN
ERRO R
CATV BC
+100 TV
CATV
ERRO R
CATV
+100 TV
CATV
GAIN
PW R/
ERRO R
CATV
+100 TV
GAIN
1
TM
DUC864 DIGITAL UPCONVERTER
12
POSITION RACK MOUNT POWER SUPPLY
2 FRONT PANEL CONTROLS and INDICATORS
F1
DUC864
PWR/
ERROR
F2
TMQA M
QA M
TD8VSB
8-VSB DEMODULATOR
TMQA M
QA M
DU C864
P WR /
TMQA M
QA M
DU C864
P WR /
PS8
POWER SUPPLY
MODULA TOR
BIT RATE
19.327 M
SNR
23 dB
LOCK
ERRO R
CHA NNEL
2
5
MODULA TOR
BIT RATE
19.327 M
CAT V
ERRO R
2 5
BC
MODULA TOR
BIT RATE
19.327 M
CAT V
ERROR
2 5
BC
2 5
CATV BC
E NTE R ENTER
14 dB
+100
TV
CA TV
ENTER
+100
TV
CA TV
+100 TV
F3
GAI N
GAI N
CAT V
GAI N
F4
DUC864
Figure 1
DRMM4
F1 - POW
ER/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.
For example: For example:
Setting for CATV Setting for CATV
channel "125"-
channel "25"-
2 5 2 5
The R.L. Drake DUC864 is a low noise
upconverter used to translate the 44 MHz
F2 - Channel Number Switch
CATV BC
+100 TV
CATV BC
+100 TV
digital IF signal from a QAM or VSB modulator,
DDC downconverter, or other similar equip-
ment to the desired CATV or off-air output
channel. A single model covers the entire 54 to
860 MHz output range. The DUC864 features
low phase noise and can be used for QAM
modulation up to 256 QAM. This module can be
rack mounted using the DRMM4 or DRMM12
rack mount. The PS8 power supply module is
required with the DRMM12.
Sets t
he desired operating channel for standard
CATV or Broadcast channel plans. See also
Item F3 which sets the type of channel (CATV
or Broadcast TV) and sets the leading “1” for
CATV channels 100 through 135.
F3 - Channel Mode Switch
Sets the type of channel, CATV or Broadcast.
The CATV +100 mode sets a leading “1” for
CATV channels 100 through 135.
CATV CATV
F4 - GAIN Control
This control sets the RF o utput level. The full
clockwise setting is a minimum output of
+45 dBmV.
TM is a trademark of the R.L. Drake Company
is a registered trademark of the R.L. Drake Company
© Copyright 2005 R.L. Drake Company P/N: 3852387A-10-2005 Printed in the U.S.A.
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