Blonder tongue AMM-806, Reference Manual

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AQM - Agile QAM Modulator
The AQM is designed to accept a DVB ASI (Asynchronous Serial
Interface) digital transport stream and modulate it into a QAM
(Quadrature Amplitude Modulation) signal. The QAM modulator in
the AQM achieves state-of-the-art performance with capabilities to
improve bandwidth efficiency by supporting advanced QAM modes
like 256, 512 & 1024 QAM. Plus, the built in advanced bit stuffing
circuitry ensures that Null Packets are inserted into the ASI transport
stream if needed to ensure the correct baud rate is transmitted.
Excellent RF performance is vital to the health of every cable system.
Incorporating digital signals into that cable system increases the
complexity required to keep it operating smoothly. The AQM’s
integrated upconverter is designed to accomplish this very goal.
The BT Agile QAM Modulator incorporates a custom design
approach utilizing the latest generation technology available to
ensure extremely low phase noise and a highly stable output signal.
This eliminates the hassles and potential for problems caused
by module based interconnects, especially when using products
without integrated upconverters.
The AQM is easily accommodated in Blonder Tongue’s standard HE
Series of micro-modular rack chassis units (MIRC-12V) and the MIPS
power supply units. This allows existing modulators or demodulators
to coexist effortlessly.
Features
• AQM Unit Integrates the QAM Modulator and a High Performance
Upconverter
• Compact Design allows 6 Modules in a 2 RU Rack Chassis
• DVB ASI Input, Complies with DVB ASI Standards
• Improve Bandwidth Efficiency with Support for All Advanced QAM
Modes including, 256, 512 & 1024 QAM
• Agile QAM Output 54—864 MHz, (NTSC Mode Channel 2—135
& 12.5 kHz Steps in MHz Frequency Mode)
• NTSC & PAL B/G Capable
• Self Test PRBS Mode Built In
• Optional IF Output Available via Special Order
• Optional LVDS Input Available via Special Order