3.11 LNA/LNB power supply monitoring

The IO-FEP2 provides 6 power supply circuits for LNAs / LNBs with short circuit protection and monitoring capabilities for voltage and current. This page controls the voltage and current limits for each individual supply circuit.

• Enable --- Enables or disables monitoring for this particular supply circuit. When enabled, voltage and current are measured and compared to the limits defined for this circuit. Measurement values and the comparison results are displayed at the main status page. When disabled, these fields remain empty. The short circuit protection remains active, even if monitoring is disabled.
• Name --- You may define a descriptive name for the LNA supplied by this circuit.
• VoltageLowLimit --- The voltage limit (V). If the supply voltage drops below this value, a fault is raised an a message is written to the event log.
• CurrentLowLimit --- The current low limit (mA). If the supply current drops below this value, a fault is raised an a message is written to the event log.
• CurrentHighLimit --- The current high limit (mA). If the supply current raises above this value, a fault is raised an a message is written to the event log.
• calc --- Clicking to this link lets you enter a percentage value for the low/high current limits. The IO-FEP2 takes the actual current reading and sets the limits the given number of percent points below and above it.

Remarks

LNA/LNB power supply monitoring is only available, if this feature is licensed.

In case of a short circuit the voltage will drop to zero due to the protection circuit built into the IO-FEP2.