The RazorPlus Express is available in dual channel models supporting a maximum A/D sampling rate up to 500 MS/s or250 MS/s. ADC data can be captured in dual channel or single channel modes with six software selectable input voltage ranges at ±100 mV, ±200 mV, ±500 mV, ±1 V, ±2 V, and ±5 V.
The analog input bandwidth is 300 MHz for the 500 MS/s sampling rate model with 50 Ω input impedance or 150 MHz with 1M Ω input impedance. For the 250 MS/s sampling rate model, the analog input bandwidth is 150 MHz for both 50 Ω and 1M Ω input impedance. The input channels are fixed for DC-coupling with software selectable 50 Ω or 1M Ω input impedance. The wider 300 MHz bandwidth is especially useful for RF based applications by enabling direct RF sampling of wider band signals.
AC-coupling is useful for applications in which a small AC signal is sitting upon a large DC bias. In these cases, the DC bias can be removed with AC-coupling to reduce the input range for better signal fidelity. A configuration for fixed AC coupling with software selectable 50 Ω or 1M Ω input impedance is available as an option. The coupling front end is factory hardware configured and is not software switchable.
The RazorPlus Express includes 4 GS (8 GB) of on board acquisition sample memory. The on board acquisition memory size is shared and equally divided among all active input channels (2 or 1) when acquiring data to on board memory.
With the optional eXpert PCIe Data Streaming FPGA Firmware package, the dual-port architecture of the on board memory is utilized as a large FIFO buffer for streaming acquired data to host PC memory via the digitizers PCIe Gen3 x8 interface at sustained rates up to 2 GB/s (2-CHs * 500 MS/s per CH * 2 bytes per sample for 16-bit data). This streaming mode can be effectively utilized to conduct real-time sustained host based signal processing and/or signal recording operations of the acquired data.