The SYNTH1000 series of Direct Digital Synthesizer (DDS) boards contain two complete low noise precision waveform synthesizers on a single PCIe bus card. Each channel’s frequency may be programmed from 50KHz to 800MHz (with reduced performance to 1000MHz). Amplitude may be independently programmed from 0 to 800mV p-p into 50 ohms. Designed for low jitter operation in communications, industrial and scientific applications, these boards function in PCIe bus systems using supplied drivers for 64-bit Windows 7™ or CentOs 6. In addition to dual synthesizers, the SYNTH1000x2 board has three external TTL inputs for each synthesizer channel, which can be used to allow external equipment to dynamically switch each synthesizer between up to eight frequency profiles, for a variety of dynamic waveform synthesis applications (frequency/phase/amplitude modulation, high speed quadrature modulation, triggered frequency sweeping, etc.). The TTL inputs can also be used to switch ramping direction, or pausing the ramp.
Both synthesizer channels are driven from a common 3.5GHz CRO timebase, frequency locked to a sub-1ppm-accurate TCXO, for precise channel-to-channel frequency tracking.
All models have two independent output channels, each driven by the filtered output of a dedicated Analog Devices AD9914 DDS IC, and include additional firmware to allow advanced functionality such as software selectable internal or externally triggered profile switching capability. Further information for each model is given below.