VME/VXS Digitizer Offers Wide Input Bandwidth

Simultaneously providing wide input signal bandwidth and dynamic range, the SVM3500 is a quad-channel 12-bit digitizer allowing channel interleaving to provide sampling up to 2 GS/s. With more than 2 GHz of analog bandwidth, the module is suited for applications in radar, electronic warfare (EW) and synthetic instrumentation (SI). The digitizer builds on the modular U1083A VME/VXS base card with an analog digitizer mezzanine that includes four 12-bit, 500-MS/s ADCs. The mezzanine incorporates a clock distribution circuit, the MCK, which distributes an external clock throughout the mezzanine in phase, in anti-phase, or in quadrature with very low added jitter, allowing interleaved sampling rates at up to 2 GS/s. When interleaving, frequency-dependant gain and delay mismatch correction is handled by a finite impulse response (FIR) filter implemented in an on-mezzanine Xilinx Virtex-5 FPGA that also includes an externally accessible lookup table (LUT), correcting any static offset and gain errors. The resulting analog performance, including spurious-free dynamic range (SFDR) of up to 80 dBc at 500 MS/s and 70 dBc at 2 GS/s, total harmonic distortion (THD) of 80 dBc at 500 MS/s and 79 dBc at 2 GS/s, and signal-to-noise ratio (SNR) over 62 dBc, maintains more than 10 effective bits over a band of 10 MHz to 1 GHz. An optional firmware development kit (FDK) is available to help development of application firmware. The Agilent SVM3500 VME/VXS digitizer module is available now. AGILENT TECHNOLOGIES, Santa Clara, CA. (877) 424-4536 or (408) 345-8886.