For example: Agilent E4440A or Anritsu 68369
Pulse/Data Generators
Racal Instruments 3171
80MS/s Waveform and Dual Output Pulse Generator VXI 407533
Manufacturer: Racal Instruments
Keysight / Agilent 81160A-002
Pulse Function Arbitrary Noise Generator
Manufacturer: Keysight / Agilent
Keysight / Agilent 8118A
2 Ch, 16KB/Ch,100Mbit/s, Pulse Pattern Generator
Manufacturer: Keysight / Agilent
Stanford Research Systems DG645
Digital delay / pulse generator (4 or 8 ch.)
Manufacturer: Stanford Research Systems
Tektronix DTG-5274
DATA TIMING GENERATOR; 2.7 GB/S DATA GENERATOR,4SLOTS FOR OUTPUT MODULES,0.2 PS DELAY CONTROL RESOLUTION,CAN CONNECT 1 MASTER AND 1 SLAVE
Manufacturer: Tektronix