OPHIR vega User Manual page 14

To subtract background and set current reading to zero:
1. From the main power measurement screen press
"Offset".
2. Press "Offset" again to cancel. See Section 4.4.2.2 for
full details.
To use the Vega to fine-tune Laser power:
1. From the main power measurement screen select
"Menu" and enter. Select "Tune" and enter.
2. Set the percentage range of the power scale to be
displayed by repeatedly pressing the ±50% key.
3. Now select the horizontal sweep time you desire by
selecting "Graph" and choosing the time scale.
4. You may now use the screen to tune the laser power.
See Section 4.4.2.3. for full details.
5. Press "Power" to exit to the main measurement
screen.
To use the Vega to measure Laser energy:
1. Verify that the display shows "Energy" in the upper
right hand side of the display.
2. If the display shows "Power" and units of W (or mW
etc) then press "Energy" to switch to the energy
measurement mode.
3. Energy measurement is performed in manual ranges
only. Select "Range" and hit the Enter key. Use the
navigation keys to select the proper range. To save
this range as the default startup, press "Save". The
correct range to select is the lowest one that is larger
than the expected pulse energy to be measured. Note
that the range will be displayed in the lower right
corner of the main display.
4. When the Vega screen flashes "READY," on and off,
fire the laser. See Section 4.5 for full details.
To save configuration:
1. To save configuration, follow directions in Section
2.2.2 above.
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