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Alarms

Access through SYSTEM → ALARMS tab.
The parameters that trigger alarms are based on the FM tuner signal.
  • If RF Level < 40 dB or multipath > 10%, measurements are not valid.
  • In this case, fields appear dimmed and no alarms are generated.
The 542APC can send email alerts for the following events:
  1. AUDIO SILENCE
  2. OVERMODULATION
  3. LOW RF POWER

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Alarms Configuration

542 Alarms System Pn
  • E-mail Send To → address where alerts will be sent.
    • “Send Test” sends a test email.
To send alerts to multiple addresses, use the mail forwarding feature on the configured account.
  • LOG and E-MAIL checkboxes → enable internal memory logging and/or email sending.

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Alarm Types

  • AUDIO SILENCE:
    • Triggers when the signal falls below the threshold defined in Fail Backup.
    • The time limit (seconds) is adjusted with a slider control.
    • Important: the FM Receiver post-Gain signal is analyzed, so gain affects detection.
  • OVERMODULATION:
    • Activates if modulation exceeds the value defined in the alarm.
    • This setting does not affect transmission, only detection.
  • LOW RF POWER LEVEL:
    • Activates when low transmission power is detected.
    • Procedure: press Set REF under normal conditions. Then define the % of loss that triggers the alarm.
    • Does not affect transmission.
  • SYSTEM START:
    • Generates alarm when equipment restarts (e.g. power outage).
  • SYSTEM ERRORS:
    • For internal use only. Events are logged in SYSLOG.