For example: Agilent E4440A or Anritsu 68369
National Instruments Computers / Accessories
National Instruments 6071E
PCI-6071E (Legacy) 64 Ch, 1.25 MS/s, 12-Bit, 2 AO, 8 DIO, 2 24-Bit Counters
Manufacturer: National Instruments
National Instruments GPIB-RS485/422
GPIB-to-RS485/RS422 Converter
Manufacturer: National Instruments
National Instruments PXIe-1062Q
8-Slot 3U PXI Express Chassis With AC - Up to 3 GB/s
Manufacturer: National Instruments