Manuals / Paradyne / Computer Equipment / Network Card

Paradyne DMD15L operation manual Modulator Specifications, Demodulator Specifications, Fec

Models: DMD15 DMD15L

1 201
Download 201 pages 34.1 Kb
Page 174
Image 174

DMD15/DMD15L/DMD15/DMD15LL/DMD15/DMD15LIBS/IDR Satellite Modem

Technical Specifications

 

 

Section 7 – Technical Specifications

7.0 Modulator Specifications

Modulation:

BPSK and QPSK (OQPSK, 8PSK, 16QAM optional)

Data Rates:

9.6 Kbps to 10 Mbps in 1 bps steps

Symbol Rates:

6300 to 6500000 Symbols per second

 

128000 to 6500000 Symbols per second (8PSK/16QAM

IF Tuning Range:

50 to 90, 100 to 180 MHz in 1 Hz steps

 

950 – 1750 MHz (optional L-Band)

IF Impedance:

75 Ohms, 50 Ohms (optional)

 

50 Ohms (optional L-Band)

IF Connector:

BNC, (L-Band, SMA)

IF Return Loss:

20 dB minimum (13 dB L-Band)

Output Power:

-20 to +5.0 dB in 0.1 dB steps (L-Band -5 to -30 dB)

Output Stability:

±0.5 dB over time and temperature

Output Spectrum:

Meets IESS 308/309/310 Power Spectral mask

Spurious

< -55 dBc in any 4 kHz band

On/Off Power Ratio:

> 60 dB

Scrambler:

CCITT V.35 or IBS (others optional)

FEC:

Viterbi, K = 7 at 1/2, 3/4 and 7/8

 

Rate Sequential 1/2, 3/4, 7/8 (optional)

 

Trellis 2/3 (optional)

 

Turbo Product Code (optional)

 

Rate 3/4 (0.793) - (64, 57) x (64, 57)

 

Rate 1/2 (0.495) - (32,26) x (32,26) x (4,3)

 

(Turbo supported at all modulation types)

Outer Encoder Options:

Reed-Solomon INTELSAT Rates

Data Clock Source:

Internal, External, Rx Recovered

Internal Stability:

1 x 10-6Typical (optional to 1 x 10-7)

7.1 Demodulator Specifications

Demodulation:

BPSK and QPSK (OQPSK, 8PSK, 16QAM optional)

Data Rates:

9.6 Kbps to 10 Mbps, 1 bps steps

Symbol Rates:

12696 to 6500000 Symbols per second (B/O/QPSK)

 

128000 to 6500000 Symbols per second (8PSK/16QAM)

IF Tuning Range:

50 to 90, 100 to 180 MHz in 1 Hz steps

 

950 to 1750 MHz (optional L-Band)

IF Impedance:

75 Ohms, 50 Ohms (optional)

 

50 Ohms (optional L-Band)

IF Connector:

BNC, SMA (optional L-Band)

IF Return Loss:

20 dB minimum

Spectrum:

INTELSAT IESS 308/309/310 compliant

Input Level:

-55 to -25 dBm

Adjacent Channel Rejection Ratio:

> +14 dBc

Total Input Power:

+10 dBm or +40 dBc (the lesser)

TM051 - Rev. 5.8

7-1

Page 173 Page 175
Page 174
Image 174
Paradyne DMD15L operation manual Modulator Specifications, Demodulator Specifications, Fec
Page 173 Page 175

DMD15, DMD15L specifications

The Paradyne DMD15L and DMD15 are advanced digital modems designed to enhance communication in a variety of networking environments. As part of Paradyne's robust portfolio of networking solutions, these devices are engineered to deliver reliable and efficient data transmission over both copper and fiber optic connections.

One of the main features of the DMD15L and DMD15 is their capability to support Multiple Protocol Data Units (MPDUs), which enables them to handle a diverse range of network protocols seamlessly. This flexibility makes them suitable for different applications, from industrial automation to telecommunications.

These modems utilize advanced modulation techniques, such as Quadrature Amplitude Modulation (QAM), to maximize data throughput while maintaining signal integrity. This ensures that users benefit from high-speed connections, even in challenging signal environments. Furthermore, the DMD15 series incorporates Error Correction Codes (ECC) that enhance data reliability, effectively reducing packet loss and ensuring data coherence during transmission.

The DMD15L is particularly notable for its long-range capabilities, making it a go-to solution for users requiring extended distances without compromising data quality. It features built-in Adaptive Equalization, which automatically adjusts signal levels to optimize performance over varying transmission distances. This technology is crucial in maintaining consistent high-speed connectivity, especially in environments with variable conditions.

Both models are equipped with user-friendly interfaces that facilitate configuration and management. They support SNMP (Simple Network Management Protocol) for real-time network monitoring, allowing administrators to track performance metrics and identify potential issues before they impact users. The devices also include LED indicators for quick status checks, ensuring that users have immediate visibility of operational conditions.

In terms of physical characteristics, the DMD15 and DMD15L are designed for durability and ease of installation. They come in a compact form factor, making them suitable for deployment in constrained spaces. Additionally, their robust casing is built to withstand harsh environmental conditions, making them suitable for both indoor and outdoor installations.

Overall, the Paradyne DMD15L and DMD15 are high-performance modems that combine versatile technologies, reliability, and user-friendly features. They are excellent choices for organizations looking to enhance their communication capabilities and ensure robust data transmission across diverse networks. With their advanced functionalities and adaptability, these modems stand out as key components in modern network infrastructure.