User's Manual

Product description

4.3 Safeness algorithms

The apparatus is provided with a hardware and software protective system which is

partly integrated and partly optional.

4.3.1 Software’s protections

4.3.1.1 IPF (Intelligent Proportional Foldback)

The IPF is an intelligent system which reduces the equipment’s output power in case

of excess of load mismatch, thus preventing the equipment turning off.

Foldback acts if the load mismatch increases slowly. If the event is fast (examples: a

spark into a connector, the detachment of a transmission line, a short circuit and so on),

the protection acts quickly.

The activation of this feature is shown on display and via telemetry as alarm no. “026”.

4.3.1.2 IPC (Intelligent Power Control)

When the equipment is properly working, the IPC keeps the output power constant

within $1% of the target set, irrespective of mains voltage, temperature and load vari-

ations.

This greatly contributes to making the equipment insensitive to its working conditions.

The IPC also allows to optimize the efficiency of the RF section by making work the

MOSFETs constantly at maximum efficiency, thus minimizing overall electrical con-

sumption.

4.3.1.3 Safety Management (“Lifextender”)R

The Safety Management consists of algorithms to perform real-time analysis of the

transmitter's operating status. It works in order to maintain the output power set,

according to kind and severity of any anomalies (internal or environmental) which may

occur.

The Safety Management may perform an output power reduction proportional to the

severity of the anomaly that occurs, in order to avoid the propagation of the fault.

The algorithms act at different levels and in various sections of the equipment: Ther

mal Management on the RF unit; Current Management, Fault Management and Ther

mal Management on the power supply units; Fault management on the RF unit; Cool

ing Management on the fans.

Thermal Management on the RF’s group (Lifextender)

When the temperature measured in close proximity to the MOSFET exceeds 72°C,

an algorithm intervenes that reduces the output power to a value such as to keep the

temperature back within a still acceptable value. If this appens, an alarm of “Rf thermal

derating” (no.010) is sent.

If this algorithm does not manage to maintain the temperature below 75°C, the trans

mitter is switched off.