The four channel PMT controller board

Controller Circuit Board

The four channel PMT controller board is a PIC microcontroller based device that communicates with a PC by USB as an HID device and with a PIC-based “hand unit” via PIC-to-PIC RS-232 protocol. These two external inputs (USB and RS-232) send strings to the PMT controller that:

* Sets the four high voltage levels of the PMTs

* Provide four bipolar offset voltages for black level adjustment on an external amplifier system

* Control a 2 level programmable gain of a four channel external amplifier system
* Control analog mixing of channels of the four channel external amplifier system
* Depending on the type of PMT module attached, communicate