Broadcast Transmitter Management

The Best-in-Class Automated Transmitter Remote Control

Broadcast Transmitters are unique and complex pieces of equipment. Davicom’s Cortex units can adapt to any transmitter and be used to perform extensive automation, monitoring and control with these transmitters. One example of a heavy-lift configuration is a versatile N+1 controller.

An explicit Graphical User Interface provides instant visibility of system status and switchover progress while allowing safe manual control, if required. Switchover can occur in as little as 2 seconds, if the interlocks and RF switch allow rapid operation.

Interfacing to the transmitters and switches is achieved via metering and status inputs as well as relay outputs. SNMP control and monitoring is also optionally available for transmitters having such capabilities.

A typical switchover sequence goes as follows:

  • Problem detected in Main TX (low RF power, no response to ping, no audio)
  • Shut-down main TX
  • Check to ensure both TX’s are off
  • Switch Main TX to RF load and Backup TX to antenna
  • Validate the position of Baseball switch
  • Turn Backup TX RF power ON
  • Keep checking the rest of the conditions in real-time and wait for manual Return-to-Main TX command

Find out what sensors or features can be used to achieve this functionality

USEFUL FEATURE

SNMP
MANAGER

Most modern broadcast transmitters have built-in SNMP agents that can be used to monitor and control many operational parameters within the transmitter. Settings such as the main RF power level, RF standby mode, Audio input selection should all be controllable. Readings indicating RF output power, antenna VSWR, Audio modulation level, internal temperature, control processor loading, power supply voltage and current are often available.

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USEFUL FEATURE

VIRTUAL LOGIC &
SEQUENCES

Cortex systems provide automation with decision making features and commands that go well beyond conventional telemetry systems. Units can for example detect an RF failure; place the standby transmitter on-air to restore the signal, and alert on-call personnel. Engineering staff can then diagnose the problem from the event history log and, using remote measurements, decide on the appropriate course of action. These actions are programmed by using simple Virtual Logic Gates and cascading them to create more complex automations.

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