Added information on power related issues

en/sensor/sf45_rotating_lidar.md

@@ -66,3 +66,11 @@ The obstacle overlay in QGC will look like this:
 The [sensor driver](../modules/modules_driver_distance_sensor.md#lightware-sf45-serial) publishes the [ObstacleDistance](../msg_docs/ObstacleDistance.md) UORB Message that is used by PX4 [Collision Prevention](../computer_vision/collision_prevention.md).
 The measurements in each sector will correspond to the lowest measurement the sensor had in that corresponding sector.
 The data is then published to the [OBSTACLE_DISTANCE](https://mavlink.io/en/messages/common.html#OBSTACLE_DISTANCE) MAVLink message.
+
+## Debugging / Common problems
+If you are experiencing start-up issues, jerky movements or a lot of com errors displayed with `lightware_sf45_serial status` this could mean that you are having power issues.
+
+The Sensor seems to be quite sensitive in regard to whether he gets enough power.
+According to the Datasheet, the sensor needs 300 mA of current at 5V, whereby the stock cable is fairly long and can cause problems where the voltage drops too much.
+So it's important to make sure that the cable is kept as short as possible.
+As an alternative, you can power the SF45 via a separate Step-down converter from battery voltage. With this approach, you're able to eliminate all power-related issues.