This PCB for a PG-872 Dual Channel Square Wave Generator (generator designed by Leonid Ivanovich Ridiko)

• number of output channels 2
• number of trigger inputs 1
• number of internal synchronization channels 2
• external and internal triggering mode
• range of setting the pulse duration 10 ns ... 10 s
• discreteness of setting the duration of 10 ns
• range of setting the delay up to 10 s
• discreteness of setting the delay 10 ns
• range of setting the period 20 ns ... 10 s
• discreteness of setting the period of 10 ns
• range of dead start time up to 10 s
• discreteness of assignment of dead time 10 ns
• rise time * 2 ns
• level of output signals –5 ... + 10 V
• discreteness of level control 10 mV
• attenuator limits 0 dB, –20 dB, off.
• output impedance 50 ohm
• threshold of synchronization signal -5 ... + 5 V
• discreteness of threshold adjustment 10 mV
• input resistance of the sync input 200 ohm
• duration of the synchronization signal is not less than 10 ns
• switchable digital filter of synchronization signal
• measurement of the period of external sync pulses
• memorization of ten sets of parameters
• USB interface (galvanic isolation)
• power supply network 220 V
• power consumption no more than 10 W
• dimensions 160 x 140 x 60 mm
• weight 0.5 kg

Description, full technical documentation http://www.leoniv.diod.club/projects/measuring/pg-872/pg-872.html

Discussion https://www.eevblog.com/forum/projects/diy-pulse-generator-pg-872/