DDS signal source, DDS signal generator, sine wave generator, QA-212D provide the highest flexibility and uncompromising performance, integrating advanced technologies such as high-precision reference frequency generation, direct digital synthesis, high-speed and high-precision analog-to-digital conversion, digital filter, digital level adjustment, etc. into Dacheng, and achieving dual channel function/arbitrary waveform signal generation up to 120MHz in an ultra small volume (200 * 128 * 44 MM).
QA-212D includes the PC control software Signal Virtuoso that is compatible with it. Signal Virtuoso fully utilizes the powerful and vivid color graphical interface display function of the PC screen, and adopts 3D effect controls, allowing users to easily and conveniently manipulate the signal generator to generate any signal they want. Signal Virtuoso supports remote download and online firmware upgrade.
Ultra high frequency: With dual channels, UHF frequency band, real-time 500MSa/s sampling rate, and high-performance arbitrary waveform generator, it provides excellent waveform application mixed signal excitation solutions for the increasing measurement challenges, and generates waveforms with fine timing resolution.
High precision: 16 bits vertical resolution, user-friendly interface design and keyboard layout provide users with extraordinary experience; Rich standard interfaces enable easy remote control of instruments, making it a powerful assistant for engineers to debug circuits.
Ultra stable: With a signal frequency of 1ppm and phase noise as low as -120dBc/Hz, your machine is highly stable and can generate stable, accurate, pure, and low distortion output signals; High definition widescreen display and user-friendly interface design provide users with extraordinary experience;
Optional: Provide users with more solutions. Users can customize the maximum output of 120MHz sine wave according to their own requirements, or customize the maximum storage depth of 64M. Customers can customize what they need according to their own needs, greatly facilitating engineers to deal with design and debugging challenges.

Main product features:
*Dual channel, real-time 500MSa/s sampling rate, 16bits vertical resolution.
*Generate arbitrary analog scalar modulation signals, vector modulation signals, and logic signals.
*Multiple built-in function signals are generated (including sine, triangle, sawtooth, square wave, pulse, noise, DC, etc.).
*The maximum output is a 120MHz sine wave.
*The signal frequency is highly stable at 1ppm, and the phase noise is as low as -120dBc/Hz.
*The waveform storage depth reaches 56K samples/channel.
*USB connection to PC GUI interface, simple and easy to operate.

Main technical parameters:
Number of channels: 2
Maximum frequency: 120MHz
Sample rate: 500MSPS
Output waveforms: sine, triangle, sawtooth, square wave, pulse, noise, DC, etc
Frequency resolution: 1 µ Hz
Vertical resolution: 16 bits
Frequency accuracy (1 year): 1ppm, 18 ° C-28 ° C; 2ppm, 0 ° C-55 ° C
Phase noise (@ 20KHz offset): 10MHz<-120dBc (typical value); 100MHz<-110dBc (typical value)
Total harmonic distortion: DC -20kHz<0.2%+0.1mVrms
Output amplitude (up to 50 µ): 10mVpp -10Vpp
Output accuracy (1kHz,>10mVpp, automatic range): ± 1% set ± 1mVpp
Output flatness (sine wave, relative 1kHz, automatic range):
< 10MHz ±1%（0.1dB）
10MHz-50MHz±2%（0.2dB）

The supported waveforms are as follows:
1. Non modulated waveform
(1) Periodic waves
1. Sin: sine wave, maximum frequency 120MHz, power range -56dBm~24dBm (i.e. 1mvpp~20mvpp)
2. Square: Square wave
3. Triangle: Triangular wave
4. Pulse: Pulse wave
5. Ramp: oblique wave
6. DC: Direct Current
7. PRBS: Pseudo Random Binary Sequence
8. AWGN: Gaussian white noise
(2) Any wave
1. Gaussian Pulse: Gaussian pulse, also known as Gaussian bell shaped curve
2. Cardiac: Electrocardiogram
3. Exponential fall: exponential decline
4. Exponential rise: Index increase
5. Haversin: Semi positive loss curve
6. D-Lorenz: D Lorenz curve
7. Lorentz: Lorentz curve
8. Sinc: Also known as the Sinc function
9. Negative Ramp: Negative Slant Wave
10. User defined: User defined waveform

2. Modulation waveform
AM: amplitude modulation
MASK: amplitude shift keying
FM: Frequency modulation
MFSK: Frequency Shift Keying
PM: Phase modulation
MPSK: Phase Shift Keying