Description:
The QHD4040 is a Quad digital upconverter which achieves previously unavailable density and conservation of headend rack space for upconverter intensive applications such as digital video on demand (DVOD) and cable modem service. Advanced design allows a single card to cover a frequency band from 88 to 858 MHz and still maintain a phase noise specification which exceeds the requirements of 64/256 QAM. Remarkably low out of band noise performance and low spurious are achieved through high level mixing, a microwave frequency IF and multiple levels of filtering.
Each chassis with common power supply contains 4 independent frequency agile upconverters in a 1U rack mount configuration. The redundancy features of this product make it suitable for the most demanding applications. Built-in power detectors allow for easy input and output level configuration. The controller module features a remote control interface (with optional SNMP), allowing full control and monitoring of all frequencies and levels. This advanced, cost effective upconverter offers high performance, flexibility and space efficiency.
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Features:
 High level output, +61 dBmV 88 to 858 MHz
Front panel selectable output frequency in 12.5 kHz step size
Digital slope compensation to achieve <±0.3 dB slope over any channel
Auto IF ALC automatically corrects for input level changes (non-bursty)
Out of band noise performance < -12dBmV/-30dBmV / 6 MHz
Excellent in band noise performance
User defined soft alarms for IF and RF levels can be enabled from remote control
RF output mutes when changing output configuration
High reliability, state-of-the-art design using microstrip MMIC and surface mount technology
Conservative component derating and 100% burn in help ensure reliable operation
Low power consumption
All local oscillators are frequency synthesized and locked to a common internal high stability reference
Local control via Vacuum Fluorescent
Display and 4 soft touch push buttons
Remote control via RS232/RS485/Terminal mode or optional SNMP
FLASH memory for fast, easy updates
Front panel displays IF and RF power levels
International internal autosensing power supply (100 to 240 VAC; 50 to 60 Hz); -48 VDC power supply optional
High reliability fans ensure cool operation for long product life
1-to-1 redundancy (50 ms switching)
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