Quantel Ultra Big Sky Laser Series User Manual page 26

22 | Contents | Operation
Q-Switch Menu
To enter the "Q-Switch" menu from the Main Menu, scroll to "Q-Switch"
and press the "Enter Menu" button.
The Q-Switch menu contains:
Main menu

QS sync INT
FLQS dly 120µs
>QS mode AUTO
Ramp

Main menu:
Select this item to return to the Main menu from the
Q-Switch menu.
QS sync: Select "QS sync" to choose between Internal and
External Q-Switch synchronization. Press the "Increase/Decrease
Value" buttons to switch between INT (internal) and EXT (external).
Uses Internal mode, where the ICE450 generates
INT (internal):
Q-Switch pulses synchronous to the flashlamp fire order at the
time delay specified by "FLQS delay".
EXT (external): The Q-Switch fires when a valid signal is applied
to the QS-In BNC connector.
FLQS dly: Use "FLQS dly" to adjust the delay between the
flashlamp pulse and the Q-Switch pulse.
Scroll to "FLQS delay" and press the "Increase/Decrease Value"
buttons to change the delay value.
QS mode: Use the "QS mode" item to select one of three Q-Switch
operating modes: AUTO, BURST, SCAN.
Note: These features are available only in Internal Q-Switch
synchronization. In External synchronization, the External Q-Switch trigger
source controls the Q-Switch pulse. See
Requirements on page 52
for more information.
Version M 22-April-2012
External Trigger Signal
|
Ultra
AUTO mode: In "AUTO" mode the Q-Switch pulses on every
flashlamp pulse by default. An additional adjustment in "AUTO"
mode is "QS pulse".
The "QS pulse" setting causes the Q-Switch to pulse on every
second, third, fourth, etc., flashlamp pulse. Use the following steps
to adjust the "QS pulse" function:
To Set "QS pulse": Position the cursor on "QS mode" and use
the "Increase/Decrease Value" buttons to change to "AUTO".
Then press the "Enter Menu" button to show the QS AUTO mode
menu. It contains the following items:
QS menu

>QS mode: AUTO
QS pulse F/01
QS menu: Press the "Enter Menu" button to select this item to
return to the Q-Switch menu,
QS pulse: This item allows you to change the ratio of flashlamp
pulses to Q-Switch pulses. It is displayed as F/N. The Q-Switch
fires once every N times the flashlamp fires.
Example: If this setting is "1", the Q-Switch fires every time the
flashlamp fires; if "2", the Q-Switch fires every second time the
flashlamp fires and so forth. The range of acceptable values for
QS pulse is 1 to 99.
Example: If QS pulse is set to 50, the flashlamp will fire 49 times
without a Q-Switch pulse.
This feature may be used to ensure that the resonator is
thermally stable before the Q-Switch is fired.