Thunderbolt Monitor Kit Manual v5.0.6
Page 6
3/8/2020
The difference between UTC time and Local time is set by the Time Zone offset and
then Daylight Savings Time option, which are dependent on your location and laws in
your region. Therefore the Time Zone and Daylight Savings Time options are also
adjustable through the menu. You will need to adjust these settings if Local Time is
selected.
Sidereal time is displayed on the GPS second therefore the Sidereal Time is displayed
with fractional seconds.
Note that sidereal time display uses longitude information from the Thunderbolt. If the
longitude fluctuates such as it will if the antenna location is poor, sidereal time will
fluctuate as well. To reduce noise, the longitude value used for sidereal time calculations
is averaged 10 times. If that is not sufficient for your application, the best solution is to
make sure your antenna is getting a good signal. There is only so much that we can do
in software to compensate for poor antenna location.
Self Survey:
To perform its duty as a precision instrument, the Thunderbolt receiver needs to know its
position accurately. This is done through a Self-Survey. When completing a Self Survey,
the Thunderbolt may be instructed to store its position in non-volatile memory.
If moved, the Thunderbolt may have difficulty reacquiring proper timing information
unless Self-Survey is performed again. In such cases, use the Android app’s Self Survey
command or Trimble’s TBoltMon Windows software to start the self survey. Note that the
duration of self survey is typically 2000 seconds, during which timing information from
the Thunderbolt may be unreliable.
Test Alarms:
The kit can display all the available alarm messages (and trigger the alarm outputs)
when the Test Alarm menu setting is used. This is convenient for testing any logic or
indicator you may have hooked up to the Alarm outputs. When you select Test Alarms
through the menu, make sure you exit without saving (select ‘No’ when asked to Save
Settings.) Otherwise, the kit will reboot in normal mode (Test Alarm mode is not saved to
EEPROM and does not survive a power cycle or a forced reboot.)
Menu:
To activate the menu, press the Menu (+) key briefly.
Once the first menu item is displayed, navigate through the various options using short
presses on the Menu (+) and Edit (-) keys. The parameter name is displayed on the top
row with an arrow in front of it, and the current setting is displayed on the second row.
When the setting you want to change is displayed, press the Edit (-) with a long press (at
least 800mS) until the arrow moves to the second line in front of the value. Release the
Edit (-) key and use short presses on the Menu (+) and Edit (-) keys to adjust the
parameter to the desired value.
When the desired value has been selected, press the Edit (-) with a long press until the
arrow moves back on the top row. Continue the process until you have changed all the
parameters you wish to change.
