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FAQs - Frequently Asked Questions

What is the TTL-synchronization-option for?

As the wavelength-meters are provided with a photodiode which detects a laserpulse and triggers the measurement, this option is usually not necessary. But in some special cases, like you want to measure only every 10th pulse, or you have big background-radiation, which fills up the array with noise, you need the TTL-synchronization-option which is done via TTL-cable. This cable is included in the wlm delivery, if the external trigger is asked for.
To measure in pulsed mode with IR-wavelength-meters, this option is needed too, as IR-wavelength-meters are not equipped with a photodiode yet.