Hytera DS-9300, User Manual

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System Maintenance User Manual
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 Regularly check and record the working status and main parameters such as receiving signal level,
output noise level, and downlink output power.
 Check whether the coverage meets the requirements.
 Check whether the monitoring system works properly.
 Check whether the signs and labels on the devices are complete.
 If the device malfunctions, return it for repair.
7.3
Alarm Handling
Alarm Information Solution
LNA and PA Alarm
Check whether the power supply and signal cable connection of the LNA and
PA modules are in good condition. If the alarm still exists, replace the module.
Power Fault and Power
Down Alarm
If the power down alarm is generated, check whether the AC power connection
is in good condition, and whether the power supply is normal.
PA Over-temperature
Alarm
Change the temperature threshold to clear the alarm. It's recommended to set
the maximum temperature threshold to 90°C. If the alarm still exists, cool the
device down.
Door Alarm
Check whether the cabinet door is properly closed. If the alarm still exists after
the door is closed, check whether the door and the alarm cable are properly
connected.
Location Alarm
Check whether the device is moved illegally. If not, check whether the alarm
cable is properly grounded.
Downlink VSWR Alarm
Check whether the SWR threshold of the downlink PA is set correct. It is
recommended to set the threshold as 3.0. If the alarm does not disappear,
check whether the antenna system is connected well, or flooded with water. It
is recommended to use a VSWR tester to test the actual SWR threshold.
Uplink/Downlink
Input/Output
Over-power/Under-power
Alarm
Change the input/output over-power/under-power thresholds to clear the
alarm. It is recommended to set the thresholds as follows:

Uplink Output Over-power Threshold (Donor Unit): 0 dBm (nominal
downlink output power)
 Downlink Input Over-power Threshold (Donor Unit): –5 dBm

Downlink Output Under-power Threshold (Remote Unit): +25 dBm (nominal