1 DUC864 DIGITAL UPCONVERTER
TM
2
FRONT PANEL CONTROLS and INDICATORS
Figure 1
For example:
For example:
Setting for CATV
Setting for CATV
channel "125"-
channel "25"-
F1
F2
F3
F4
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 - Channel Number Switch
Sets the 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.
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.
The R.L. Drake DUC864 is a low noise
upconverter used to translate the 44 MHz
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.
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.
TMQAM
QAM
MODULATOR
BIT RATE
19.327 M
ENTER
ENTER
19.327 M
BIT RATE
MODULATOR
QAM
TMQAM
SNR
14 dB
23 dB
TD8VSB
8-VSB DEMODULATOR
2
5
CHANNEL
LOCK
ERROR
2
5
DUC864
GAIN
PWR/
ERROR
CATV
+100
BC
TV
CATV
TMQAM
QAM
MODULATOR
BIT RATE
19.327 M
ENTER
CATV
TV
BC
+100
CATV
PWR/
GAIN
DUC864
2
5
PS8
POWER SUPPLY
ERROR
DUC864
2
5
DUC864
GAIN
PWR/
ERROR
CATV
+100
BC
TV
CATV
CATV
TV
BC
+100
CATV
ERROR
PWR/
GAIN
DUC864
25
CATV
TV
BC
+100
CATV
ERROR
PWR/
GAIN
DUC864
25
CATV
TV
BC
+100
CATV
ERROR
PWR/
GAIN
DUC864
25
CATV
TV
BC
+100
CATV
ERROR
PWR/
GAIN
DUC864
25
DRMM4
F4 - GAIN Control
This control sets the RF output level. The full
clockwise setting is a minimum output of
+45 dBmV.
12 POSITION RACK MOUNT POWER SUPPLY
2
5
2
5
CATV
+100
CATV
CATV
+100
CATV
BC
TV
TV
BC