General
The DS303C is a multi signal generator for terrestrial
digital TV broadcasting. If assembled together with
the optional units, it can output signals compatible
with terrestrial digital TV broadcasting systems used
in countries around the world, including ATSC in
North America, DVB in Europe, ISDB in Japan, and
DTTB in China.
Using an optional modulation methods, it can also output signals for different types of terrestrial digital
TV broadcasting. This makes it possible to handle different TV broadcasting systems without the need
to prepare different signal generators for different TV broadcasting systems.
■ Features
◇ The DS303C is a multi signal generator for terrestrial digital TV broadcasting in worldwide.
◇ Supports multi terrestrial digital TV broadcasting systems
ATSC, SCTE (USA QAM, Annex B), DVB-C (Annex A), ISDB-T (including 1 segment), ISDB-C (Annex
C), DVB-T, DTTB (China, GB20600-2006)
◇ The DS303C consists of TS SG unit, Modulation unit, and Up Converter unit
TS SG Unit: Generates moving pictures and test patterns for each modulation system
TS output from its internal HDD or the external HDD connected via USB.
☆NOTE: We do not guarantee the performance of the equipments connected via USB
Modulation Unit: Up to 8 different modulation systems can be installed into a unit
Up Converter Unit: Generates RF signals from 35MHz to 955MHz
◇ Noise signal can be added. (C/N 0.0 to 30.0dB, 0.1dB step)
◇ BER (Bit Error Rate) measurement is available.
◇ TS-Remux for ISDB-T system can be executed by external PC software.
◇ If a power amplifier (optional RA series) is added to the DS303C, a centralized TV signal generator
system can be established.

Specifications
◇ Main Frame
REF output signal
Connector BNC-J/ 50 ohm
Frequency 10 MHz within 0.1ppm (It follows the
input signal at an External input mode)
Level 0.9Vp-p (Typ.), sine wave
REF input signal
Connector BNC-J/ 50 ohm
Frequency 10 MHz
Level 0.8 to 1.1Vp-p, sine wave
Monitoring functions Fan monitor, power failure, Alarm of each
optional unit.
◇ TS SG Unit (Optional DS303C100)
Output signal DVB-SPI (Conforms to EN50083-9)
Drives DVD drive and HDD (80 GB or more)
Interfaces USB, LAN, Serial (for UPS connection)
Compatible stream
Compliant with ISO/IEC 13818-1, MPEG-2
system, and MPEG2-TS
Transmissionrate 0.5 to 60 Mbps (depends on TS contents)
Packet length 188/204/208 bytes
TS Play mode Normal, Cycle, Repeat
◇ TS Contents
Moving picture
Signal name Fujisan
Systems HDTV 1080i
SDTV 576i for DVB-T/DTTB system
Natural still picture
Signal name Dining Table
Systems HDTV 1080i
SDTV 576i for DVB-T/DTTB system
Test signal
Signal name Colorbar
Systems HDTV 1080i
SDTV 576i for DVB-T/DTTB system
◇ Modulation Unit (Option DS303C200)
Input signal DVB-SPI (Conforms to EN50083-9)
DVB-ASI (Conforms to EN50083-9)
IF output signal
Connector BNC-J/75ohm
Frequency 44 MHz +/-200 kHz (1 Hz step)
Level -15 dBm, Typical
Additional functions
CN function (0.0 to 30.0dB, 0.1dB step)
BER measurement
☆NOTE: CN and BER function is available for ATSC, DVB-T,
ISDB-T, and DTTB system.
PRBS signal can be generated
IF signal polarity switchable
Modulation (Options)
ATSC DS303C210, ATSC/A53 standard
ISDB-T DS303C211, ARIB STD-B31
DVB-T DS303C212, ETSI EN 300744
DTTB DS303C215, SAC GB20600-2006
SCTE DS303C220, ANSI/SCTE 07,
ITU-T Recommendation J.83 Annex B
ISDB-C DS303C221, ITU-T Recommendation
J.83 Annex C
DVB-C DS303C222, ETSI EN 300429,
ITU-T Recommendation J.83 Annex A
◇ Up Converter Unit (Optional DS303C300)
IF input signal
Connector BNC-J/75ohm
Frequency 44 MHz
Level -15 dBm, Typical
RF output f signal
Connector BNC-J/75 ohm
Frequency 35 to 955 MHz (1Hz step)
Frequency Accuracy
within 0.1ppm (at +25 degree C)
within 0.2ppm (at +5 to +40 degree C)
Level +10 to –100 dBm (0.1 dB step)
Level Accuracy
within 2dB for +10dBm to –50dBm
within 3dB for –50.1dBm to –100dBm
Spurious Less than -60dBc
(at 0dBm output, except harmonic wave)
Monitor output signal
BNC-J/75ohm (About –20dB from the
RF output)
◇ Remote control option (Optional DS303C001)
RS232C, GP-IB, GPI
◇ General specifications
Operating temperature
5 to 40 degree C, 20 to 85%RH (non dewing)
Power supply AC100 to 240 V, 50/60 Hz
Power consumption
Max. 250 VA
Dimensions 426(W) x 149(H) x 460(D) mm
Weight 17 kg or less (within TS SG, modulation and
up converter unit)