WL-FlexDDS-NG-DUAL

Flexible Dual Channel Phase-Continuous 1 GS/s 400 MHz Agile Radio Frequency Source

  Datasheet

FlexDDS-NG DUAL is a dual-channel phase continuous direct digital signal synthesizer. Based on the successful design of the FlexDDS multi-channel RF source developed for the Max Planck Institute for Quantum Optics, FlexDDS-NG is the next generation waveform generator which directly addresses the needs of experimental physicists.

FlexDDS-NG DUAL is the "next generation" improved version of the legacy multi-channel FlexDDS. If you require more than two channels, take a look at the new multi-channel FlexDDS-NG.

Main Applications

  • Driving AOMs (acousto-optic modulators)
  • Ultra-cold atom experiments, coherent atom manipulation
  • Control loops that require analog modulation
  • BEC evaporation ramps
  • Replacement for VFG-150.

Downloads

Datasheet
Date: 2021/2/22
Size: 895 KB
FlexDDS-NG-DUAL Manual
Date: 2021/8/2
Size: 2677 KB
Firmware and Drivers
Date: 2021/2/22
Size: 494 KB
LabView Drivers
Date: 2021/2/22
Size: 195 KB

News

   1st September 2019
New firmware release adds config registers in order to route BNC inputs directly to the pins of the AD9910. This enables for instance the use of the OSK feature (fast on/off) or quick switching of profiles.

Features

  • Direct Digital Synthesis (DDS) at 1 GS/s and 14 bit resolution enables highly configurable and precisely repeatable signal generation with a frequency range from 0.3 to 400 MHz (resolution 0.23 Hz)
  • Two independent output channels with precisely known phase relationship
  • One DDS Command Processor (DCP) per channel with 8 ns timing resolution and separate instruction cache (4096 entries) enables fast real-time control of all signal parameters and execution of complex sequences with deterministic timing
  • Versatile signal generation: Phase-continuous linear frequency/amplitude sweeps with external hold and direction inputs, phase ramps, fast profile switching, RAM playback, separate amplitude sweep generator and delay/timing generator
  • Two independent high speed analog modulation inputs: Amplitude, phase, frequency or polar modulation from analog signal sources with up to 20 MHz bandwidth; slope and intercept of the transfer function can be digitally set
  • Excellent signal quality (low phase noise, spurs, harmonics) with an RF output level up to +10 dBm (2 Vpp) into 50 Ω e.g. to drive mixers directly;
    Phase noise of -100 dBc/Hz at 3 kHz offset from a 200 MHz carrier
  • Fast output on/off functionality, no signal leakage in off state
  • Three real-time digital IOs for external triggering and other functions
  • Multi-channel version: FlexDDS-NG with up to 6 FlexDDS-NG-1GS slots.

Sample Output Waveforms

Click on each image for more details.

WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
FlexDDS-NG DUAL output:
Hann shaped chirped pulse using the ramp/sweep generator to change the frequency while the amplitude is fed from the RAM modulation storage.
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
FlexDDS-NG DUAL output:
Arbitrary pulse shape using the RAM modulation feature with up to 1024 samples. Any amplitude shape can be programmed.
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
FlexDDS-NG DUAL output showing analog modulation:
Top: Externally provided analog modulation signal
Center: Channel 0 configured for analog amplitude modulation
Bottom: Channel 1 set to analog frequency modulation.
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
FlexDDS-NG DUAL output:
A series of frequecy sweeps, each one can be triggered from a BNC input or internally self-timed.
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
FlexDDS-NG DUAL narrow-band output spectrum shows very little phase noise:
-100 dBc at 300 kHz offset measured in a 10 Hz RBW corresponds to -110 dBc/Hz phase noise at 300 kHz from carrier (at 360 MHz!).
Certain vendors that don't show spectra, perform poorly in this respect.
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
WL-FlexDDS-NG-DUAL Radio Frequency Generators output waveforms
Harmonics at 82 MHz and +10 dBm output power:
Harmonics at about -60 dBc for 2nd and 3rd, about -70 dBc for 4th; non-harmonic spurs below -75 dBc (barely visible)