Downstream

HDO774 downstream transmitter supports frequencies up to 1218 MHz and has one 5 dBm output. HDO774 is a 1550 nm DWDM transmitter for long distances. It supports broadband, narrowcast and broadcast services in digital and analog formats.

Feature:

• DOCSIS 3.1 compatible
• User settable ITU channels
• External modulation enables different link spans with one transmitter (more than one receiver)
• External modulation doesn’t require dispersion compensation
• Standardised input and test point levels
• Low power consumption and high performance
• Two inputs with level adjustments
• Equaliser in both inputs
• High isolation between inputs
• Unused input can be switched off for power saving and noise reduction
• Integrated input amplifiers and laser driver amplifiers
• Automatic power control providing constant total OMI as standard feature
• Optional integrated xWDM filter to combine forward and return paths into one fibre or to combine various forward wavelengths into one fibre
• Fibre connectors can be located at the rear or at the front panel
• Small form factor family, 2 RU height
• Local and remote software control of all adjustments
• Forced cooling through the unit

Management features:

• Setting of ITU channel (wavelength)
• Monitoring of APC (Automatic Power Control) functionality with user configurable offset
• Signal level adjustment in both inputs
• Slope adjustment in both inputs
• Input 2 switch on/off
• LED indicators for signal and module statuses
• Internal temperature measurement and monitoring
• Intelligent fan speed control with monitoring
• Non-volatile logging of 32 latest events, including alarms, alarming values, settings changes and application starts.
• Uptime and total uptime counters
• All adjustments and alarm limits fully user configurable
• Local PC connection through backplane HDO bus with HDX021 cable
• Remote IP connection through HDC100 controller module
• SNMP monitoring and configuration through HDC100 controller module