EXFO T200S, User Manual, Page: 40 / 146

Setting the Emission Wavelength/Frequency
34
T200S
Performing a Sweep Sequence
Triggering the Sweep Sequence
The following procedure explains how to control the sweep by using an input trigger: the
laser starts sweeping when it receives a rising edge trigger signal. When it reaches the stop,
it waits for a trigger to sweep again (for more details on signal levels, see
Technical
Specifications
on page 1).
The following figure illustrates a triggered one-way sweep:
To perform a sweep sequence with a trigger signal:
1.
Connect the external trigger generator to the Trigger In BNC connector located on the
T200S rear panel (see
Rear panel on page 3).
2. In the SWEEP mode window, touch the button.
The Sweep mode settings menu appears.
3. In the Sweep Control area, select Trigger In .
The icon appears in the
Parameters
area of the SWEEP window.
4.
Touch anywhere outside the menu to exit.
5. Enable the laser output (see Enabling/Disabling the Laser Output on page 39).
6.
If you want to arm the laser to the start position before sweeping, touch the button.
The laser moves to the start position and is ready to perform a sweep.
7.
Touch the button to start the triggered sweep cycle.
³
If the laser was not armed, the laser first moves to the start wavelength/frequency
before waiting for a trigger signal.
³
If the laser was previously armed to the start position, it directly waits for a trigger.
Start
Trigger in
signal
No trigger
accepted
Trigger in
signal
Wait for
trigger
Pause
(if any)
Wait for
trigger
Stop
Backward
full speed
Wait for
trigger
Trigger in
signal
Pause
(if any)
Start
wavelength
Stop
wavelength
No trigger
accepted
No trigger
accepted