Comtech Radyne DD240XR Digital Video Broadcast Demodulator

Data rates up to 160 Mbps
User friendly front panel interface
Optional redundancy configuration
Internal Doppler buffer

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DD240XR Features

DVB-S and MPEG-2 compliant EN 300-421
DVB-DSNG compliant EN 301-210
DVB-S2 compliant EN 302-307
Feature and software upgrades readily available through easy-to-install PCMCIA feature cards
Data rates up to 144 Mbps for DVB-S
Data rates up to 160 Mbps for DVB-S2
QPSK, 8PSK and 16QAM operation in DVB-S
QPSK, 8PSK and 16APSK operation in DVB-S2
Reed-Solomon outer coding and LDPC/BCH
Frequency-agile 50 to 90, 100 to 180 and 950 to 2150 MHz
User-friendly front panel interface
Optional redundancy configuration
Internal Doppler buffer

DD240XR Digital Video Broadcast Demodulator

The Radyne DD240XR High-Speed Video Broadcast Demodulator is DVB-S and DVB-S2 compliant. It is an ideal choice for high data rate video and Internet applications, meeting the latest in DVB standards EN300-421, EN301-210 and EN302-307. The unit supports QPSK, 8PSK and 16QAM applications for DVB-S and QPSK, 8PSK, and 16APSK for DVB-S2 up to 45 Msps. Supporting a variety of data and IF interfaces, the DD240XR is configurable to meet all high-speed satellite applications. With field upgradeable features, the DD240XR can be easily upgraded, adding features like DVB-S2, 8PSK, 16QAM and 16APSK.

The powerful onboard Monitor and Control (M&C) processor has the unique capability to download upgraded firmware and enhanced features from a field-changeable PCMCIA card. Features can be added to the installed equipment base with extreme ease, allowing enhancements with changes in service while lowering initial installation budgets.

The DD240XR offers a frequency-agile IF input from 950 to 2150 MHz and 50 to 90 or 100 to 180 MHz. DVB-S variable data rates from 2 Mbps to 144 Mbps can be set in 1 bps steps. DVS-S2 variable data rates from 2 Mbps to 160 Mbps.

The Demodulator also offers the choice of remotely interfacing through one of two rear panel connections: Ethernet or RS-485. The front panel offers push-button control of all features and a backlit LCD display. Menus are specifically designed for ease of use and quick operation as well as changes in all demodulator parameters.

For applications requiring system redundancy, the DD240XR may be used with the Radyne RCS11 1:1 Redundancy Switch or the RCS20 M:N Redundancy Switch.

IF Interface
L-Band Specification (Standard)
Rx IF	950 to 2150 MHz
IF Step Size	1 Hz
Sweep Range	10 MHz
Input Level	C0+10 log (Symbol Rate), C0: -130 dBm/Hz to 105 dBm/Hz -70 to -45 dBm @ 1 Msps -60 to -35 dBm @ 10 Msps -53 to -28 dBm @ 45 Msps
Composite Power	<-20 dBm total input power
LNB Power	18V +/- 0.5 V, 350 mA max
Input Impedance	75 Ohm
Return Loss	7 dB
Input Connector	F Connector
Optional 70/140 MHz Specification (Includes L-Band)
Rx IF	70/140 MHz
IF Step Size	1 Hz
Sweep Range	10 MHz
Input Level	C0+10 log (Symbol Rate), C0: -130 dBm/Hz to 105 dBm/Hz -70 to -45 dBm @ 1 Msps -60 to -35 dBm @ 10 Msps -53 to -28 dBm @ 45 Msps
Composite Power	< -20 dBm total input power
Input Impedance	75 Ohm
Return Loss	15 dB
Input Connector	BNC Female
Baseband (DVB-S)
Variable data rate	2 to 144 Mbps
Step Size	1 bps
Symbol Rate	2 to 45 Msps
(FEC) Decoding
Inner Code	QPSK (Vitberbi), 8PSK (PTCM), 16 QAM (PTCM)
Code Rates	QPSK = 1/2, 2/3, 3/4, 5/6, 7/8 8PSK = 2/3, 5/6, 8/9 16 QAM = 3/4, 7/8
Outer Code	Reed Solomon, Per EN 300-421 (204,188, T=8)
Baseband (DVB-S2) EN 302 307
Variable data rate	2 to 160 Mbps
Step Size	1 bps
Symbol Rate	2 to 45 Msps
(FEC) Decoding
Inner Code	QPSK, 8PSK, 16APSK (LDPC)
Code Rates	QPSK: 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10 8PSK: 2/3, 3/4, 3/5, 5/6, 8/9, 9/10 16APSK: 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
Outer Code	BCH
Deinterleaving	Convolutional, I=12, Per EN 300-421
Data Descrambling	Per EN 300-421
Terrestrial Framing Modes	204, 188, 187
Internal Clock Source Stability	10 ppm
Internal Doppler Buffer	0 to 64 msec.
Monitor and Control
Interface	Serial RS485 (Remote) and SNMP v1, v2, v3, 10BaseT Ethernet
Parameters Controlled	IF Frequency Data Rate Symbol Rate Clock Polarity Data Polarity Inner Code Rate Test Modes Spectral Inversion Spectral Shape Factor
Parameters Monitored	Input Level (+/- 5 dB) Eb/No (+/- 1.0 dB) BER Faults Stored Faults
Optional Interfaces
Serial	G.703, E3, T3, STS-1 DVB ASI HSSI RS422/449 ECL
Ethernet	PRO MPEG COP3 & Bridge 100/1000 BaseT
Parallel	RS422 (M2P, DVB) LVDS (M2P, DVB)
Environmental
Prime Power	100-240 Vac, 50-60 Hz, 40 Watts Max.
Operating Temperature	0 to 50° C
Humidity	Up to 95%, non-condensing
Storage Temperature	-20 to 70° C
Humidity	Up to 99%, non-condensing
Physical
Size	19" W x 17" D x 1.75" H (48.3 x 43.2 x 4.45 (cm)
Weight	10 pounds (4 Kg)