AURIGA: the ADC board

 

The ADC board is a Hewlett-Packard E1430A VXI 10 MSa/s 23-bit Digitizer with DSP and Local Bus.

The main features of the HP E1430A board are:

  • High dynamic range
  • Built-in anti-alias filters and signal conditioning
  • Programmable digital filters and digital L/O
  • FIFO memory
  • Local Bus capability

Clik here for a photograph of the board.

Details: The HP E1430A high-resolution digitizer is a C-size, one-slot, register-based VXI module that can analyze spectra or capture transients, digitize IFs or record waveforms. The module includes DSP-based real time digital filtering with digital LO and large FIFO memories.

The digitizer used in this module is a two-pass (or sub-ranging) type that provides 23 bits of raw resolution. The digitizer in the E1430A has low distortion with a noise density of -136 dBfs/Hz and a noise figure of 15 dB.

The module comes with multistage digital filters built in with a maximum information bandwidth of 4 MHz. A high-speed 8 MB memory captures transients or acts as a FIFO for continuous digitizing during the block-mode data transfers used by some DSP algorithms. Data transfer is over the VXI data path and the high speed Local Bus (40 Mbytes/sec).


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