Spectra Precision ProMark 800 Reference Manual - Manual (Page 20)

8
Introduction
Antenna
Characteristics
The diagram below gives the dimensional parameters of the
ProMark 800 antenna required for the system to determine
the true height of the antenna from the measured value
obtained using one of the standard height measurement
methods, i.e. slant or vertical.
The height mark allows you to hook the measure tape onto it
so you can unroll the tape down to the survey mark and read
the slant height measurement directly on the tape.
Special Button
Combinations
• With the ProMark 800 OFF, pressing the Power, Log and
Scroll buttons simultaneously for a few seconds will
restore all the factory settings. Always use this
combination after changing the radio module. This allows
the receiver to recognize the new module.
• With the ProMark 800 OFF and a USB key connected,
pressing the Power and Scroll buttons simultaneously for
a few seconds will cause the ProMark 800 to start a
firmware upload process. If there is no USB key
connected or the key does not contain a firmware upgrade,
then the process will abort after a few seconds.
Because data has to be decompressed on the USB key
during upgrades, the USB key must be unlocked, with at
least 10 MBytes of free memory, before starting the
upgrade.
These button combinations are summarized in the table
below:
100.1 mm 104.0 mm
L1
L2
Antenna Radius
= 98 mm
SHMP Offset
=40 mm
Height Mark
Button
Combination
ProMark 800
State
Function
Power+Log+Scroll OFF Restores Factory Settings.
Power+Scroll OFF Initiates firmware update from USB key.