What to do if the red error indicator is flashing on my Em-Trak B924?
- SStephanie BartonSep 2, 2025
If the red error indicator is flashing on your Em-Trak Transceiver, it may indicate a problem with the VHF antenna system. You can confirm this using proAIS2. If the 'High VSWR' alarm is active, check for a faulty VHF antenna, cable, or connectors, a poor connection at the VHF antenna/cable/connectors, the suitability of the VHF antenna (antennas tuned to 162MHz are recommended for AIS only, while antennas tuned to 159MHz are recommended for splitter variants), and the VHF antenna location (ensure it isn't mounted near other transmitting antennas, sources of interference, metal structures, or other obstructions).













