TNP #44 - AT&T 938A LED Optical Loss Set Repair, Teardown & Experiments
In this episode Shahriar takes a look an AT&T optical loss set which is equipped LED sources 875nm & 1300nm. The unit has been storage for over a decade with heavily leaked batteries.
After the cleanup, the unit powers on and is able to measure optical power as well as generate light from the LED source. The accuracy of the photodetector is verified against a calibrated optical meter. The wavelength of the 875nm LED source is also measured using a spectrometer.
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