User Manual

2.1.4 Temperature

Once the temperature sensor module is connected to the OSD main board, the

temperature sensed by the module will be shown on the top of the screen. The

temperature unit can be selected in the OSD conﬁguration menu or via PC conﬁguration

software between °C and °F.

2.2 Power Battery Information

2.2.1 Power Battery Voltage

The voltage of the power battery is displayed on the bottom-left of the screen. This value is

sensed by the power module in real-time. And the reading can be calibrated in the OSD

conﬁguration menu or via PC conﬁguration software.

2.2.2 Power Battery Gauge

The real-time fuel gauge of power battery is shown on the screen. The system will

calculate the fuel gauge of the power battery pack according to the set maximum and

minimum voltage range described in section 3.2.1. The fuel gauge has an liner relationship

with the set voltage range.

2.2.3 Power Battery Current

The output current of the power battery is displayed on the bottom-left of the screen. This

value is also sensed by the power module in real-time. And the reading can be calibrated

in the OSD conﬁguration menu or via PC conﬁguration software.

2.2.4 Power Battery Consumed Energy

The real-time consumed energy from the power battery in unit of mA-Hour is displayed in

this area as well. The pilot will have an idea of how much energy left in the battery pack

by calculating the battery full capacity minus this value. This reading will be accumulated

since the power on of the system, and will be reset once power off.

2.3 GPS Positioning Information

The GPS module is one of the most essential component of the OSD system. If there is no

associated sensing module is connected, all the real-time data is rely on the GPS module.

Therefore, it is recommended for the pilot to always keep an eye on the GPS information,

especially the HDOP reading in the GPS status.

2.3.1 GPS Status

When the system is powered up, the GPS status will indicating “GPS Searching...” in the

initial period. Once the GPS signal from one or more satellite is received, the GPS status

will indicate the received signal strength of each satellite in form of vertical bars. The GPS

is trying to lock the position during this time. You must not take off the plane during this

time. If the connection between GPS module and OSD main board is interrupted before

the GPS position is locked, the screen will show “GPS Fail”. Once the position is locked by

the GPS successfully, the GPS status will indicating the value of the calculated horizontal

dilution of precision (HDOP). The HDOP is the index that measures accuracy of the GPS

horizontal position. If the value is very close to 1, it means the position located by the GPS

is highly accurate. The position will not be reliable if the reading is more than 6 in general.

It is not recommended to take off the plane if this reading is more than 3. The signal bars

beside the HDOP value is the GPS signal quality indication. The more signal bars, the

better number of GPS satellites are utilised for position locking.

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