Flymaster GPS - Settings Menu

Note that on Figure 4.17 when selecting and pushing ENTER the Goto Page option is not active and the
focus will be on the Enable Page . Pressing ENTER will re-enable the page.
4.8 Settings Menu
The Settings Menu is used to congure the GPS 's many features. The menu screen is divided into two
sections. On the top of the screen all the menu options are shown. Depending on the menu option selected
the associated congurable parameters are shown on the bottom of the screen (see Figure 4.18). The
desired option can be selected using the UP and DOWN keys, and the corresponding parameters altered
after pushing the ENTER key.
Figure 4.18: Settings Menu
Note that on the right hand side of the display is a scroll bar showing where the relative position of the
displayed menu compared to all of the other settings available in this menu.
All the menu options are explained on the folowing sections.
4.8.1 Set Altimeter
The Set Altimeter page (Figure 4.19) allows the user to adjusts the barometric altimeter. A barometric
altimeter calculates altitude based on atmospheric pressure , and should not be confused with the GPS al-
titude, which is calculated based on satellite information (See the article in http://www.xcmag.com/2011/
07/gps-versus-barometric-altitude-the-definitive-answer/ GPS versus Barometric Altitude). Since
atmospheric pressure can vary substantially with meteorological conditions, and so with time, the baro-
metric altitude also varies according. In order to have the correct altitude for a certain place the altimeter
should be calibrated.
Calibrating the altimeter can be achieved by entering the know altitude of the location. Entering an
altitude automatically calculates the QNH, which is the local barometric pressure adjusted to sea level.
Alternatively, the altimeter can be calibrated by adjusting the QNH for the local, and time. Changing the
QNH will adjust the barometric altitude.
Altitude can also be set from the GPS. Below the QNH you will nd a Get from GPS eld which can
be set to Yes No or Auto . Adjusting this value to Yes will make the GPS take the altitude from the
GPS and adjust the altitude accordingly. The Yes is not stored in the setting, since it is a one time only
operation. The Get from GPS can also be set to Auto , with this value being stored in the settings. When
Auto is selected, after being turned On, the GPS will automatically set the altimeter to the GPS altitude
(once the a valid GPS signal exists), or whenever the pdop value is lower than the previous one. Note
that position dilution of precision (pdop) gives you an indication of how reliable the GPS altitude is at
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