Model 409B 170MHz 4-Channel DDS Signal Generator. The 409B generates four independent, phase synchronous sine wave output signals and is programmable in 0.1 Hz steps from 0.1 Hz to 171 MHz. Phase is 14-bit programmable and amplitude is 10-bit programmable. Internal memory can store a sequence of settings in a table format. The -AC option is available to enable users to step through settings using an external trigger. It is accurate to 1.5 ppm using the on board TCXO timebase or you can use an external timebase, There is also a /R option that provides a way to lock to and track an external 10MHz frequency input. A line powered AC adapter and SOF8_409 windows software are included. The 409B data sheet is here.
Bench Top Direct Digital Synthesized (DDS) Signal Generators
Model 409C 171 MHz DDS Signal Generator. The 409C is an upgrade to the 409B. It has an upgraded table feature that supports 4 channels with faster speeds and the table commands are in decimal instead of HEX. See App Note AN009 here for a feature comparison of the 409B vs 409C. The 409C data sheet is here.
Model 426A 400MHz Dual Channel, DDS Signal Generator. The 426A generates two channels of low distortion sineware signals. Each channel is independently programmable in frequency, phase and amplitude from 300kHZ to 400MHz with 10 microhertz resolution. A Line Voltage AC Adapter and NT Terminal windows software are included. See the 426A data sheet here.
Model 440A 400MHz DDS Signal Generator. The 440A generates a sinewave is via an RS232 serial interface. The frequency is accurate to 1.5ppm and can be locked to an external frequency reference. The phase can also be programmed with 14-bit resolution. It includes a Line Voltage AC Adapter and a CD containing windows software.