Echipamente

The Model 2820’s software-defined radio architecture allows it to analyze and demodulate virtually any signal up to 40MHz bandwidth without needing to upgrade hardware. This provides high flexibility in R&D and production environments and reduces capital equipment cost. Unlike traditional instrument architectures, this DSP-based SDR architecture combines the ability to measure the signals produced by current devices with the adaptability to handle signals future devices will produce, so the instrument remains productive over a longer period.

When an RF signal is input to the Model 2820, it’s down-converted to an intermediate frequency (IF), digitized by a fast, high resolution analog-to-digital converter (ADC), and routed into the waveform memory. The high speed DSP analyzes and demodulates the signal waveform. That means the instrument’s RF signal analysis capability is defined through DSP software rather than in hardware. The DSP can switch rapidly between various optional signal analysis personalities. Alternatively, the signal’s I-Q data pairs can be output to an external PC for analysis.

A 100MHz fixed-rate ADC and a fixed-bandwidth, brick-wall, anti-alias filter combine to ensure high signal integrity by reducing alias spurs. The Digital Up/Down Converter (DUC/DDC) compresses and decompresses waveforms, which allows multiple signal sampling rates, conserves waveform memory space, and speeds signal processing. The instrument’s Field-Programmable Gate Array (FPGA) supports fast triggering and high speed signal conditioning and routing.