What to do if COMBA Antenna shows DL Input Power Overload Alarm?
If the COMBA Antenna DL Input Power Overload Alarm occurs, test the DL input power of the MU. If it exceeds +32dBm, reduce the source output power or add an external attenuator with a suitable attenuating value.
How to fix COMBA Antenna Over-Temperature alarm?
If the COMBA Antenna experiences an Over-Temperature alarm, ensure the environment temperature is within the supported range (0~40? or -20~50?). For harsh environments, apply climatic protection to the system.
What causes COMBA Antenna DL Output Power Overload Alarm and how to resolve it?
If the COMBA Antenna displays a DL Output Power Overload Alarm, it might be because the output power exceeds the threshold (39dBm for MRU). To resolve this, decrease the gain to reduce the output power.
What to do if COMBA Antenna shows Optical RX Alarm?
If the COMBA Antenna shows an Optical RX Alarm, test if the MU transmit optical power is normal (-4~-2dBm or 3~5dBm). Also, check if the optical loss of the fiber link is higher than 6.5dBo.
How to resolve COMBA Antenna Optical TX Alarm?
If the COMBA Antenna shows Optical TX Alarm because the transmit optical power is less than -7dBm or 0dBm, replace the FOU.
What should I do if my COMBA Antenna displays a PA Shutdown Alarm?
If the COMBA Antenna displays a PA Shutdown Alarm, reset the PA. If the PA service status turns to [Recovery], refer to DL PA Alarms. If the PA still shuts down, the PA module may be damaged, please contact with Comba to replace the RU.
How do I troubleshoot DL PA alarms on my COMBA Antenna?
If the COMBA Antenna has DL PA alarms and it is in [Recovery], reset PA on the WEB GUI Management page, then check the RU output power. If the output power exceeds the threshold, reduce the gain or input power; if the output power is normal, check whether the antenna port VSWR is too high.
What does it mean when my COMBA Antenna shows an External Alarm?
If the COMBA Antenna shows an External Alarm, check to ensure that the connected external device is working normally.
Provides critical safety warnings and alerts related to installation procedures.
Step-by-step instructions for installing MU and RU, including inspection and assembly.
Instructions for establishing proper grounding for MU and RU units.
Essential checks and tasks to perform before powering and commissioning the equipment.
Guides through the commissioning process including device scan, parameters, setup, and calibration.
Steps to connect to and configure the WEB GUI, including IP settings.
Details the procedure for scanning RU devices to update system information.
Configures the working mode for 2500 TDD, including DL Normal Open.
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