Vaisala LT31, Руководство пользователя, Страница: 226 / 294

User's Guide ______________________________________________________________________
226 _________________________________________________________________ M210667EN-C
synchronization signal which is transmitted by the transmitter
measurement unit and received by the receiver measurement unit.
The Main Receiver Signal Strength is the relation between the main
receiver signal value and the expected maximum receiver signal value.
The expected maximum receiver signal value is a calculated value
which is derived from the configured baseline length. A reading of a
100 % or even above is not an indication of a receiver signal
saturation.
- The lower part is used for user interaction.
Any action is started by simply pressing the appropriate key:
A Start Raw and Fine Alignment
B Start Fine Alignment only
All status information has to be read as OK for proper operation during
the alignment.
During the raw alignment, all axes of the transmitter or receiver
measurement unit are set to the mid position.
When all the mid positions have been reached, an acoustical signal is
generated at the transmitter and receiver location. Information about the
finalisation of raw alignment by the user has to be given to the LT31
system.
After that the fine alignment will be started by the LT31 system. During
the fine alignment, all axes are scanned to find the axis’ position for the
highest main receiver signal available.
To run the fine alignment, you must have at least some transmitter light
at the LT31 receiver.
It is recommended to perform the calibration procedure after the fine
alignment.
Raw and Fine Alignment
To start the raw and fine alignment, press A after entering the Alignment
menu.
CAUTION The transport protection in the transmitter and receiver measurement
unit must be removed before moving any optics.