Common control unit for FM and TV transmitters - Rohde & Schwarz

straightforward menus provide access toall parameters of the transmitter system.You can call up setting ranges and abrief description for each parameter; thisespecially facilitates the system‘s occasionalon-site use (FIG 3).ExciterR&S NetCCU®800Since the R&S NetCCU®800 uses Javasoftware and the XML description language,the menus can easily be adaptedto customer-specific requirements (e.g.other languages).In addition to the increasingly importantremote control of unattended stations,network management systems of thenetwork operator can be directly connectedwith the control unit and communicatewith its integrated SNMP agent.The agent automatically informs the controlcenter about errors on the transmitterstation via SNMP trap. The CCU isalso equipped with a web server, providingthe maintenance personnel, whichis often at different sites, access to allparameters of the transmitter systemvia a standard web browser when andwhere needed (FIG 4). Structure andcontent of the menus are identical to thelocal operation of the transmitter via display.EthernetEthernetLocal controlAmplifierCAN busFIG 2Designed to achieve highperformance: The ControlUnit R&S NetCCU®800 communicatesvia Ethernet or aCAN bus with the transmittercomponents.FIG 3For local operation, the instrumentdisplay provides comprehensiveinformation aboutthe transmitter parameters.DVB-T receiver module optionFIG 4Convenient remote control via a web browser.As with the predecessor model of thecontrol unit, the DVB-T receiver moduleoption [3] is available for monitoringthe output signal of a DVB-T transmitter.This allows monitoring of importantparameters such as MER, BER, S/N,input level and modulation mode andcall them up via the user interfaces(local, SNMP and web). In the retransmitterapplication, this option is used tocost-efficiently feed the modulation signalwhen receiving the RF of a mastertransmitter.Manfred Reitmeier45News from Rohde&Schwarz Number 188 (2005/IV)