Primes HP-MSM-HB, Оригинальное руководство пользователя

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95 Revision 00 EN - 01/2021
HP-MSM-HB
35,0(6
22.2.3 Examples for triggered measuring mode
Example 1: Pulse duration 50 ns
Pulse frequency 1 kHz
HP-MSM-HB Settings:
Delay:
950 µs
Integration duration: 0.1 ms
Trigger channel: External trigger
Depending on how precisely you are able to set off the trigger, you can also extend or shorten the integration
time.
Measure:
Initiate a measurement. You now have 20 sec. to set off a trigger.
As a result of the delay value of 0.95 ms and the fixed integration time of
100 µs, the HP-MSM-HB detects the second laser pulse after setting off the trigger.
Example 2: Pulse duration 1 ms
HP-MSM-HB Settings:
Delay:
12 µs
Integration duration: 1 ms
Trigger channel: Internal trigger
Measure:
Initiate a measurement. You now have 20 sec. to set off a laser pulse.
The HP-MSM-HB measures 12 µs after the trigger is set off.
In this example, the first 12 µs of the laser pulse are not measured:
Example 3: Measuring exactly one pulse
Trigger mode: Triggered operation
In the
CCD Settings
dialog window, there is a selection menu called
CCD Operating Modes
. There you can
choose between background, raw data, and measurement data.
When measuring in raw data mode, the CCD is read out quite normally. A second, dark measurement, is not
performed though. Depending on the application case, wavelength, and integration time, there may be obvi-
ous errors in the background.
It makes sense to measure in this mode when exactly one pulse will be triggered. Since there won’t be a
second, dark, measurement, this single pulse is enough. Here the attenuation should be chosen so that the
integration time is longer than the pulse duration. This makes it possible to avoid most background effects. If
the integration time is too long though, more dark electrons will be generated.
If you would like to record the entire pulse, it must be triggered externally. In this case, the minimum delay
between the trigger and start of the measurement should be 12 µs.