DRAKE DUC864 Handmatig

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DUC864 DIGITAL UPCONVERTER
TM
12 POSITION RACK MOUNT
8-VSB DEMODULATOR
TMQAM
TMQAM
TD8VSB
QAM
MODULATOR
MODULATOR
SNR
BIT RATE
LOCK
BIT RATE
CHANNEL
23 dB
19.327 M
19.327 M
2
5
ERROR
ENTER
14 dB
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.
is a trademark of the R.L. Drake Company
TM
is a registered trademark of the R.L. Drake Company
© Copyright 2005 R.L. Drake Company
POWER SUPPLY
DUC864
DUC864
TMQAM
PS8
QAM
PWR/
QAM
PWR/
ERROR
ERROR
MODULATOR
BIT RATE
19.327 M
2
5
2
5
CATV
BC
CATV
BC
+100
TV
+100
TV
ENTER
CATV
ENTER
CATV
GAIN
GAIN
DUC864
DRMM4
P/N: 3852387A-10-2005
Printed in the U.S.A.
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 - 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.
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.
F1
DUC864
PWR/
ERROR
F2
2
5
CATV
BC
+100
TV
F3
CATV
GAIN
F4
Figure 1
For example:
Setting for CATV
channel "125"-
2
5
CATV
BC
+100
CATV
F4 - GAIN Control
This control sets the RF output level. The full
clockwise setting is a minimum output of
+45 dBmV.
For example:
Setting for CATV
channel "25"-
2
5
CATV
BC
TV
+100
TV
CATV