RFSatellite Modem Manufacturers and Suppliers
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“Modem” is short for modulator and demodulator. Modems are fundamental components in both wireless and wireline communication systems.
The primary function of a modem is to modulate baseband information onto an RF (Radio Frequency) carrier for transmission and, conversely, to demodulate a modulated RF signal to recover the original baseband information.
A satellite modem is specifically designed to access and provide connectivity to satellite networks.
It typically interfaces with a MUX (Multiplexer) or EPABX (Electronic Private Automatic Branch Exchange) on one side and an RF Transceiver on the other. These modems are commonly used to connect remote areas via satellite, enabling voice and data applications.
Satellite Modem Generic Specifications
When purchasing a satellite modem, consider the following essential features:
- RF Frequency of Operation: The specific frequency band the modem operates in.
- Baseband Bandwidth: The range of frequencies the modem can process in the baseband signal.
- Modulation Schemes Supported: The types of modulation techniques the modem can handle, such as BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), and QAM (Quadrature Amplitude Modulation). Different schemes offer varying data rates and robustness.
- FEC Schemes Supported: The error correction methods the modem employs, including Convolutional encoding, Reed-Solomon, and Turbo codes. These techniques help ensure reliable data transmission in noisy environments.
- Power Level Control: The ability to adjust the transmit power of the modem.
- RF Frequency Step Size: The granularity with which the modem can tune to different RF frequencies.
- Scrambler ON/OFF Feature: A scrambler helps to randomize the data stream to improve performance.
- Other Interfaces/Ports: Availability of interfaces like RS232, RS485, and RS422 for various control and data connections.
Satellite Modem Manufacturers and Suppliers
The following table lists prominent satellite modem manufacturers and suppliers:
| Company Name | Products |
|---|---|
| Comtech EF Data Corporation- www.comtechefdata.com | Satellite modem, Gateway router, VSAT solutions, RAN/WAN optimization products, satellite router and more. |
| Hughes Network Systems- www.hughes.com | |
| Teledyne Paradise Datacom Ltd- www.paradisedata.com | Satellite modem, SSPA (Solid State Power Amplifier), RF converter, modem/router and more. |
| ViaSat, Inc.- www.viasat.com | Satellite modem, IP cores, Antenna, Gateway, Radar and more |
| Gilat Satellite Networks Ltd.- www.gilatnetworks.com | Antenna, satellite modem, RF amplifier and more. |
| Singapore Technologies Electronics Limited- www.stee.stengg.com | Satellite modem, LNA (Low Noise Amplifier), TWTA (Traveling Wave Tube Amplifier), Block up converter, transceiver and more. |
| THURAYA- www.thuraya.com | Satellite modem, voice and data based products and more. |
| CDOT INDIA- www.cdot.in | ATM (Asynchronous Transfer Mode), switches, exchanges, optical network, satellite modem and more satellite related products. |
| IRIDIUM- www.iridium.com | Satellite modem, satellite transceiver, wifi & encryption related products and more. |
| NEWTEC- www.newtec.eu | Satellite modem and other satellite communication related products. |
