Specifications

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Section 1: Headend Equipment
Upconverter
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Analog Signal Processing
Commander 8
®
Dual Upconverter
• Superior phase noise performance
• Dual independent upconverters in 1RU
• 1 GHz bandwidth in two models
• Frequency selection in 12.5 kHz steps or by HRC, IRC, EIA channel maps
• User friendly display and interface
• Network management ready
• Internal sensors for IF and RF signals
• DC power capable
• Downloadable firmware
The Commander 8
®
Upconverter (model C8U) is the next generation of headend upconverter which builds on the
award winning success of the Commander 6
®
Upconverter. The C8U leads the upconverter industry in performance
and features and is an ideal solution for both analog and digital headend and hub locations. Two frequency agile
models, the C8U-L (50 to 600 MHz) and the C8U-H (550 to 1000 MHz), cover all current and future broadband
frequency requirements up to 1 GHz, with a convenient 50 MHz frequency overlap between models.
The C8U consists of dual independent upconverters in a reliable single rack unit (1RU) package, avoiding thermal
and mating problems while providing space efficiency. A bright, wide two-line vacuum fluorescent display (VFD)
provides access to all upconverter controls and is accessed via a convenient menu system. Front panel access to
independent RF and IF test points is provided. Easy rear panel fuse access is also provided.
Each independent upconverter in the C8U incorporates three switchable IF inputs for redundancy, emergency alert
or programming purposes, facilitating operational flexibility. These IF sources may be switched automatically or
manually.
The C8U is network management ready and is compatible with Motorola’s NETsentry Network Management
Systems via the LIFEnet proxy as well as with Motorola’s Headend Control Software (HCS).
In a digital system, the C8U can accept any digital IF signal between 41.0 and 47.0 MHz. The C8U continues the
C6U legacy of handling many types of digital signals including 64 QAM, 256 QAM, 8-VSB and QPSK signals.
In an analog system, the C8U supports addressable channels. An encoded composite IF signal is received from a
scrambler, such as Motorola’s model MVP-II, and is upconverted to the proper RF channel for transmission.
Ordering Information
• C8U-L-X .................................. NTSC Dual Upconverter, 50-600 MHz
• C8U-L-D .................................NTSC Dual Upconverter, 50-600 MHz DC Power
• C8U-H-X .................................NTSC Dual Upconverter, 550-1000 MHz
• C8U-H-D .................................NTSC Dual Upconverter, 550-1000 MHz, DC Power
• C8U-LH-X ...............................NTSC Dual Upconverter, 1 Low Channel & 1 High Channel
• C8U-LHDX ..............................NTSC Dual Upconverter, 1 Low Channel & 1 High Channel, DC Power