Specifications

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Section 1: Headend Equipment
Cableoptics: Headend
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1 - 11
OMNISTAR GX2 GX2-EM870 Series
1550 nm Broadcast Transmitter
The OmniStar GX2-EM870 series of 1550 nm Broadcast Transmitters uses advanced optical linearization
technology to provide low noise and superior distortion performance.
The suite of products satisfies various applications: full band loading or split
band loading, super trunking or distribution to nodes, long-distance transport or
short hops. Also, the transmitters are optimized to specific channel plans for 4 MHz
or 5 MHz transmission system standards. A patented amplitude modulation
technique provides Stimulated Brillouin Scattering (SBS) suppression up to 16 dBm to
enable long links when used in conjunction with optical amplifiers.
The transmitter uses a 1550 nm DFB laser diode as a precision light source, which is modulated by an optically
linearized Mach Zehnder modulator. Use of external modulation technology eliminates laser chirp and allows
designs of transport systems for distances well beyond 100 km.
Enhanced with PowerPC technology by Motorola, the GX2-EM870 series introduces a new found intelligence to
traditional headend equipment. The system performance is continuously monitored and a sophisticated control
algorithm assures optimum performance.
• Provides full performance 50 - 870 MHz forward bandwidth
• Designed for combination analog/digital operation
• SBS suppression up to +16 dBm
• Test point for RF input
• PowerPC provides advanced control to assure optimum performance
Ordering Information
Model Number Description
GX2-EM870B7/16 1550 nm Broadcast Tx, 79 NTSC channels, 7 dBm Tx, SBS suppression 16 dBm minimum
GX2-EM870B7/13 1550 nm Broadcast Tx, 79 NTSC channels, 7 dBm Tx, SBS suppression 13 dBm minimum
GX2-EM870B10/11 1550 nm Broadcast Tx, 79 NTSC channels, 10 dBm Tx, SBS suppression 11 dBm minimum
GX2-EM325B7/16 1550 nm Broadcast Tx, 40 NTSC channels low, 7 dBm Tx, SBS suppression 16 dBm minimum
GX2-EM550B7/16 1550 nm Broadcast Tx, 39 NTSC channels high, 7 dBm Tx, SBS suppression 16 dBm minimum
GX2-EM870D7/16 1550 nm Broadcast Tx, 64 PAL channels, 7 dBm Tx, SBS suppression 16 dBm minimum
GX2-EM870D7/13 1550 nm Broadcast Tx, 64 PAL channels, 7 dBm Tx, SBS suppression 13 dBm minimum
GX2-EM870D10/11 1550 nm Broadcast Tx, 64 PAL channels, 10 dBm Tx, SBS suppression 11 dBm minimum
GX2-EM325D7/16 1550 nm Broadcast Tx, 32 PAL channels low, 7 dBm Tx, SBS suppression 16 dBm minimum
GX2-EM550D7/16 1550 nm Broadcast Tx, 32 PAL channels high, 7 dBm Tx, SBS suppression 16 dBm minimum