24
Chapter 5 Operation Guide
（
4
）
Pin 18 is the Master Oscillator (MO) signal. The MO should be switched
ON at least 5ms earlier than the Booster (BS) is switched ON. Once the MO is
switched ON, the laser starts to consume more electrical power.
（
5
）
Pin 19 is the Booster control input. HIGH means switching the BS on and
LOW means switching it OFF. The laser starts to emit light within specified delay
time after the pin 19 is set HIGH and stops emitting when the pin 19 is set LOW.
Pin16 Pin21 Alarm description
L
L
Laser temperature is out of the operating temperature range.
L
H
Normal Operation
H
H
MO Alarm
CAUTION :
◎
The MO should be switched ON at least 5ms earlier than the BS is switched
ON. The laser does not start to emit if you switch the BS ON while the MO is
LOW/OFF.
◎
If the MO is switched ON later than the BS is switched ON, the laser will
emit about 1ms later than the switching of the MO. It is abnormal operation
which should be avoid and not listed in the user guide. The BS switches ON
simultaneously with the rising edge of the signal applied to the pin 19.
(6
）
Pin 20 is the Synchronization input. Pulse train with a repetition rate (PRR)
within specified operating range should be applied to the pin 20 (refer to the
optical specification for PRR limits). The laser emits pulses simultaneously with
the rising edge of the signal.
CAUTION
：
◎
If the PRR is out of the specified range (or no PRR signal is supplied) the
