Agilent Technologies Inc. has developed several options for its U1084A PCI Express (PCIe) embedded ADC cards.
The family is now available with three separate base versions. The top-of-the-line U1084A-001 features sampling rates up to 4 GS/s and a fully featured front-end with 1.5 GHz bandwidth. It’s now complemented by two new versions that offer up to 2 GS/s (-002) and 1 GS/s (-003) sampling rates, respectively.
All versions are dual-channel and have an interleaved single-channel mode for maximum sampling-rate performance. In addition, the units incorporate advanced triggering capabilities, including a 15 ps trigger time interpolator (TTI) for accurate timing measurements.
The U1084A architecture can perform specific post-processing tasks, which are uploaded into the FPGA under program control.
The standard digitizer firmware (-DGT) enables the digitized data to be stored in the on-board memory of up to 512 MB. The option also provides smart memory management with segmentation mode and trigger time-stamp functionality.
In addition to the standard digitizer functionality, the optional ping-pong memory buffer architecture (-DGS) allows hundreds of thousands of analog signals per second to be simultaneously acquired and transferred over the lightening fast PCIe bus.
The signal peak detection firmware (-TDC) histograms successive acquisitions. The resulting histogram bins contain peak counts or summed peak amplitudes. Up to 60 Mpeaks/s can be accumulated, while having a trigger jitter of just 250 ps.
Alternatively, a real-time sampling and averaging firmware (-AVG) can average from 1 to 16 million waveforms with trigger rates up to 500 kHz. Signal averaging can be used to reduce random noise effects, improving the signal-to-noise ratio as well as increasing overall resolution and dynamic range.