|
The DSP back-end is based on a high performance 100 MSPS 16 bit ADC, powerful and versatile FPGA and USB 3.0 interface featuring
Superspeed (5 Gigabit per second) transfer rate. To prevent aliasing, there are two selectable anti-alias filters.
For baseband processing, a 35 MHz low pass filter is available, while for 70 MHz IF processing, a band pass filter centered at 70 MHz has to be selected.
The digitized signal is then fed into the FPGA, which performs digital down-conversion (DDC) to 33 selectable bandwidths ranging from 20 kHz up to 32 MHz.
The digitized and pre-processed signal is then streamed to the PC over USB 3.0 for further processing.
A dual-channel phase-coherent system could be based on two identical, interconnected WR-G528e/DSP modules. This would provide excellent phase stability
and flatness throughout the entire frequency range, with minimum amplitude and phase distortion, as well as minimum amplitude and phase mismatch
between the two channels. The system is capable of coherent triggering and coherent digital down-conversion, GPS time stamping and GPS
synchronization, also external TTL triggering.
Even though the WR-G528e/DSP Back-End is especially suitable for use with the WiNRADiO WR-G528e Wide-Band Phase Coherent Tuner Front-End,
it can be used with virtually any third-party receiver front-end.
|
Single or dual-channel phase-coherent applications
