QAM/8VSB Monitoring Blade VB262
The VB262 DUAL QAM/8VSB input option offers monitoring of QAM signals as found in QAM cable networks and DTT signals found in 8VSB networks. The chassis can be equipped with a single VB120 or VB220 IP-PROBE master card that has one or two VB262 QAM input cards under its control.
The complete configuration with the fully licensed VB120 provides real-time monitoring and alarming for four QAM or 8VSB RF inputs, 10 IP MPTS/SPTS multicasts and one ASI TS input. ETSI TR 101 290 analysis is performed in parallel for QAM inputs, the ASI input and the IP input. If the VB220 is used as master card the IP monitoring capacity is increased to impressive 260 MPTS/SPTS multicasts in addition to the RF inputs.
The combined unit is ideal for hybrid networks where IP is used as a carrier from head-end to the regional edge-multiplexer/modulator/transmitter. The built-in round-robin functionality allows sequential analysis of multiple QAM or 8VSB multiplexes, making it possible to monitor the total broadcast contents of a cable transmission system using a single VB262.
The VB262 DUAL QAM/8VSB input option card is an ideal solution for complete monitoring in DVB-C or hybrid DVB-C/IP networks. One VB262 module is capable of demodulating two multiplexes (one per input) for ETSI TR101290 fault detection and alarm generation in the full frequency band (44-855 MHz). By running in sweep mode the VB262 module is further capable of measuring analog signal levels, in effect offering the operator a basic frequency analyzer function at the deployment location.
