- Buyers Guide
Compressed Digital Video Exciter
The DVE series Compressed Digital Video ExciterTM is reportedly the industry's first and most compact solution for satellite uplink applications. The unit integrates an all-in-one modulator and RF converter with DiviCom's MediaView MV10 program encoder. The result is a two-rack, fully integrated solution that combines Moving Picture Experts Group-2 encoding, digital video broadcasting modulation and RF conversion functions in one package. A full range of RF output models are available, including Ka-, Ku-, C- and L-band frequency ranges, all synthesized in 125 kHz steps. A 70 MHz IF model is also available. Data rates are available from 1.5 to 15 Mbps.
LNR Communications Inc., Hauppauge, NY (516) 273-7111.
Low Cost VSAT Modem
The model STEL-9260 very small aperture terminal (VSAT) modem is reportedly the first modem designed specifically for mid-range data rate applications such as Internet access and rural telephony. The unit uses a low noise block (LNB) downconverter based on a DRO rather than a more costly high stability LNB based on a phase-locked synthesizer, reducing cost. The transmitter section has direct RF output covering the 52 to 88 MHz IF range, and programmable power levels from -5 to -25 dBm. The receiver is a true variable-rate demodulator, which is user programmable from 19.6 to 1024 kbps BPSK and 64 to 2048 kbps quadrature PSK (QPSK). The modem can track input frequency drift up to ±2 MHz without the loss of signal lock. The carrier tracking range narrows to ±1 MHz for data rates of 1 Mbps with BPSK and 2 Mbps with QPSK. Production quantities of the modem are scheduled to be available in January 1998. Price: $2100 each (100).
Stanford Telecom, Telecom Component Products Group, Sunnyvale, CA (408) 745-2660.