Instruction Manual

71
5−3 From Configuration of Logger Mode to Completion of Measurement
⑪ Set the filter and the recording start time.
For details on configuring the pre-amplifier,
see "Pre-amplifier setting" under "4-7
Explanation of Equipment Settings and
Operations" on p. 35.
It is not necessary to set the sensitivity
because the sensitivity is automatically
adjusted before recording starts.
When setting the recording start time,
remember to take into account the time
required to install the logger.
Note that the logger's circuitry starts up
approximately 1 minute before the recording
start time in order to perform various
adjustments.
⑫ Verify that the GPS LED on the
pre-amplifier is lit.
When it is lit, the sync with GPS is complete
and measurement is possible.
⑬ After sending the pre-amplifier settings,
press the pre-amplifier switch again
and verify that the settings of each
pre-amplifier are correct.
Ten minutes after the settings are sent, the
pre-amplifier enters recording standby mode
and the settings can no longer be changed
wirelessly. Once the pre-amplifier is in
standby mode, it is necessary to start again
from ① to change the settings.
⑭ Verify that all the LEDs on the pre-amplifier
are lit.
If all the LEDs are lit, the transition to logger
mode was successful.
If there is a pre-amplifier that is not lit, try
setting the pre-amplifier again.
⑮ Turn off the main unit.
When the main unit is turned on, the main
unit and the pre-amplifiers communicate
wirelessly.
⑯ The pre-amplifier circuit is activated, the
sensitivity is automatically adjusted, and then
recording starts 1 minute after the automatic
adjustment.
If the main unit is on, the pre-amplifier
recording will not start.
⑰ After 5 minutes of recording, the
post-processing starts.
The post-processing tries to acquire a
1-second timing pulse with GPS and acquire
the time delay information. If it is not
possible to acquire a 1-second timing pulse,
it tries to acquire the GPS signal by cycling
the power on and off.
⑱ When the lamps other than the power LED
turn off, press and hold the power switch to
turn off the pre-amplifier.
Recording and acquisition of correction
information for improving correlation
accuracy have been completed.