Supply +VCC pin with a voltage between 3.7 V and 15 V.
The board is regulated to 3.3 V internally.
Using more than 3.7 V supplies increases power consumption without any significant improvement in supply noise rejection.
Supply the photodetector with a maximum 2 mW optical power.
The analog output is available on the SMA connector PD out (50 Ω impedance).
The TTL output is available on the SMA connector TTL out (50 Ω impedance).
Adjust the detection threshold with the potentiometer (blue).
The threshold can be monitored on the MON pin.