The dual SPAD power supply DSN 102 is an accessory for the SPCM-AQR(H) SPAD detectors of Excelitas Technologies, the PDM modules from Micro Photon Devices (MPD), the COUNT SPADs from Laser Components and the τ-SPAD from PicoQuant. It controls and monitors the operation of the detectors. The DSN 102 can control two SPAD modules at the same time, displaying the count rate of one selected module.

The DSN 102 is also equipped with an automatic protection circuitry that shuts down the supply voltage to the modules when critical exposure levels to light are reached. While this is not a critical issue for the PDM modules, it is an absolute must for the SPCM-AQR(H) modules as indicated in the SPAD manual and also suggested for the COUNT and τ-SPAD modules. In such a case the DSN 102 gives an acoustic warning.

For further diagnostics and detector adjustment there is also a BNC output for an oscilloscope or other monitoring device. The voltage at this output is proportional to the log count rate. In addition, an acoustic count rate monitor output e.g. for use with speakers or earphones is provided.

The DSN 102 in its OEM version is an installation module (3U, 160 mm depth) designated to fit into a 19 inch subrack. The stand-alone version is supplied in a small table-top rack, equipped with the appropriate AC power supply.