Standard features include: Reed-Solomon, Asynchronous
Overhead, automatic uplink power control and CM701 compatible
satellite control channel
DMD20 LBST L-Band
The DMD20 LBST L-Band Satellite Modem breaks new ground in flexibility, operation and cost. With
standards including IDR, IBS and DVB, and covering data rates up to 20 Mbps, this 1RU duplex modem
covers virtually all your Satellite IP, Telecom, Video and Internet applications.
DMD20 LBST now offers DoubleTalk Carrier-in-Carrier bandwidth compression. DoubleTalk Carrier-in-
Carrier, based on patented “Adaptive Cancellation” technology, allows transmit and receive carriers of a
duplex link to share the same transponder space. DoubleTalk Carrier-in-Carrier is complementary to all
advances in modem technology, including advanced FEC and modulation techniques. As these
technologies approach theoretical limits of power and bandwidth efficiency, DoubleTalk Carrier-in-Carrier
utilizing advanced signal processing techniques provides a new dimension in bandwidth and power
The extensive list of software options allows for configuring the modem for today's needs while covering tomorrow's plans. These options
can be purchased and then activated in seconds via the front panel. Additional hardware options like Turbo Product Code (TPC),
interface expansion, high-stability and DC operation complete the modem's dynamic feature coverage.
This modem can be stocked at its minimum configuration (and cost) locally for immediate distribution. Then configure on-site, allowing
huge savings in time and dollars with just-in-time feature installation.
The DMD20 LBST's remote control via the RLLP (Radyne Link Level Protocol) 10 BaseT SNMP Ethernet or web browser interfaces
include control of all the modem's features plus software maintenance. Additionally, the two-line backlit LCD can be supplemented with
terminal software or a standard web browser running on a PC or laptop. The modem presents its entire monitor and control functions on
the big screen.
Supported by an extensive line of redundancy switches, converters, encoders and decoders, the DMD20 LBST can be built into any
satellite requirement. Compatibility with current modems, such as the DMD2401 and DMD15, are maintained for seamless substitution
and addition to your existing systems.
The DMD20 LBST FSK Communications Link allows the full use of all supported smart BUCs monitor and control parameters. From the
front panel, a quick status will be displayed, and the most commonly used control parameters can be modified.
Additionally, the FSK Communications Link will be accessed by the DMD20 LBST terminal port, remote port, and the Ethernet port (Web
browser/SNMP). From any of these connections, the operator can issue any valid ASCII command or request to the smart BUC. Multiple
ports can be used simultaneously without affecting the performance of the system.
BPSK, QPSK, and OQPSK (8PSK, 16QAM Optional)
L-Band Tuning Range
950 to 2050 MHz in 1 Hz Steps
Female Type N
10 dB Minimum
0 to -25 dBm
±1.0 dB Over Frequency and Temperature
Meets IESS 308/309/310 Power Spectral Mask
On/Off Power Ratio
CCITT V.35 or IBS (Others Optional)
Viterbi, K=7 at 1/2, 3/4 and 7/8
Turbo Product Code (Optional) Per IESS 315
QPSK/OQPSK 1/2, 3/4, 7/8
8PSK/16QAM 3/4, 7/8
Legacy Turbo Rates: 0.495, 0.793