The programmable frequency divider has three independent counters.
The internal operating voltage (14 V) is generated by a pulsed power supply and is short circuit proof. The external clock can be supplied with this 14-V voltage.
The divider ratios of the counter (Z1, Z2 and Z3) are determined by inserting a jumper per each count. From left to right, doubles the divider ratio (2, 4, 8, 16, 32).