The STEL-2375A direct digital chirp generator (DDCS) hybrid uses digital techniques to synthesize high fidelity, long
The STEL-2375A direct digital chirp generator (DDCS) hybrid uses digital techniques to synthesize high fidelity, long duration chirp waveforms, also known as Linear FM, or swept frequency. According to the manufacturer, in terms of Time-Bandwidth Product, digital synthesis has several orders-of-magnitude advantages over analog techniques, such as dispersive delay lines. In addition, 32-bit resolution and a 1 GHz update rate give the generator a high performance.
The unit includes a DAC and digital synthesizer ASIC in a small hybrid package. It operates on standard ECL supply voltages and is available with MIL-PRF-38534 screening. Double-buffered input latches allow the user to easily generate custom chirp waveforms. Test fixtures are available for evaluating this device. The evaluation board needs only power, a RF clock source, and an IBM PC compatible for control via an RS232 serial interface.
ITT Industries, Microwave Systems, 59 Technology Dr., Lowell, MA 01851. Tel: 978-441-0200; Fax: 978-453-6299