Comtech Radyne DD240XR Digital Satellite Video Broadcast Demodulator
L-Band or 70/140 MHz IF Input, data rates up to 160 Mbps DVB-S2
DD240XR Video Broadcast Demodulator
This product has been designated end of life by the manufacturer. Please contact us for info on a suitable replacement.
The Comtech Radyne DD240XR Digital 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 16-QAM 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 240XR is configurable to meet all high-speed satellite applications. With field upgradeable features, the Comtech DD240XR can be easily upgraded, adding features like DVB-S2, 8PSK, 16-QAM and 16APSK.
Control Processing
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.
Agile RF Input
The popular Radyne 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. DVB-S2 variable data rates from 2 Mbps to 160 Mbps.
Remote Interface
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 RCS11 1:1 Redundancy Switch or the RCS20 M:N Redundancy Switch.
SpecificationsIF Interface L-Band Specification (Standard) |
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RX IF |
950 to 2150 MHz |
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IF Step Size |
1 Hz |
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Sweep Range |
10 MHz |
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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 |
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Composite Power |
< -20 dBm total input power |
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LNB Power |
18 V +/-0.5 V, 350 mA max. |
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Input Impedance |
75 Ohm |
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Return Loss |
7 dB |
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Input Connector |
F Connector |
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Optional 70/140 MHz Specification (Includes L-Band) |
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RX IF |
70/140 MHz |
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IF Step Size |
1 Hz |
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Sweep Range |
10 MHz |
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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 |
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Composite Power |
< -20 dBm total input power |
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Input Impedance |
75 Ohm |
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Return Loss |
15 dB |
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Input Connector BNC female Baseband (DVB-S) Variable data rate 2 to 144 Mbps |
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Step Size |
1 bps |
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Symbol Rate |
2 to 45 Msps |
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(FEC) Decoding |
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Inner Code |
QPSK (Vitberbi), 8PSK (PTCM), 16-QAM (PTCM) |
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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 |
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Outer Code Reed Solomon, Per EN 300-421 (204,188, T=8) Baseband (DVB-S2) EN 302-307Variable data rate 2 to 160 Mbps |
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Step Size |
1 bps |
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Symbol Rate |
2 to 45 Msps |
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(FEC) Decoding |
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Inner Code |
QPSK, 8PSK, 16APSK (LDPC) |
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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 |
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Outer Code |
BCH |
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Deinterleaving |
Convolutional, I=12, Per EN 300-421 |
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Data Descrambling |
Per EN 300-421 |
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Terrestrial Framing Modes |
204, 188, 187 |
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Internal Clock Source Stability |
10 ppm |
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Internal Doppler Buffer |
0 to 64 msec |
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Broadband Internet Broadcasting Services, DVB-S2 Compliant, High Data Rate Video Reception Via Satellite
