| Flightcell
®
DZM Operating Manual | Firmware v2.00
Page 67 of 88 |
Setting satellite message size
When transmitting GPS positions over the satellite network using Short Burst Data (SBD) mode, you may define
the level of detail included within each message.
The DZM sends full position reports at programmed intervals. Between each position report it also records
intermediate positions (known as breadcrumbs or True Path) that provide additional course information.
Breadcrumbs are transmitted with the next position report.
SBD message size options:
The following SBD message size options are available:
Minimum Information –
The current GPS position plus the previous 2 breadcrumbs will be transmitted.
Maximum Information –
The current GPS position plus the previous 3 breadcrumbs will be transmitted.
By selecting 'Minimum Information' you should only be charged for the 30 byte minimum message charge by
your satellite network provider. By selecting 'Maximum Information', each message will be approximately 32
bytes so will cost around 10% more to transmit.
Specifying SBD message size:
From the ’Tracking Setup’ sub-menu, use the arrow keys to
navigate to ’SBD Message Size’.
Press the
ENTER key to select. The 'SBD Message Size'
screen displays.
Using the arrow keys, navigate to the mode required (e.g.
'Minimum Information').
Press the
ENTER key to save
Sending GPS location upon power up
When Power up messaging is switched on, the DZM will send the current GPS location of the aircraft as soon as it
powers up and the unit has a GPS lock. If power up messaging is switched off, GPS transmissions will not begin
until aircraft takeoff.
