For example: Agilent E4440A or Anritsu 68369
Tektronix Function/Arbitrary Waveform Generators
Tektronix AFG 3021C
ektronix AFG3021C 25 MHz, 1-Ch Arbitrary Function Generator
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Manufacturer: Tektronix
Tektronix AFG1022
Arbitrary /Function Generator: 2Channel, 125MS/s, 25MHz Sine Waveform, 14-bits, 3.9 Color LCD, 2U half rack, USB Host/Device
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Manufacturer: Tektronix
Tektronix AWG5002B
600 MS/sec, 14bit resolution, 16 Mpoint/channel, 2CH Arbitrary Waveform Generator
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Manufacturer: Tektronix
Tektronix AWG5002C
Arbitrary Waveform Generator 0.6 Gsample per second, 14 bit resolution, 2 channel
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Manufacturer: Tektronix
Tektronix AWG5012C
Arbitrary Waveform Generator 1.2 Gsample per second, 14 bit resolution, 2 channel
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Manufacturer: Tektronix
Tektronix AWG5014C
Arbitrary Waveform Generator1.2 Gsample per second, 14 bit resolution, 4 channel
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Manufacturer: Tektronix
Tektronix AWG7082C
Arbitrary Waveform Generator 8.0 Gsample per second, 10 bit resolution, 2 channel
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Manufacturer: Tektronix