New compact oscilloscope

Jon Lawson

RS Components has introduced a compact oscilloscope that has a footprint approximately the size of a passport with a thickness of 19mm. The new RS Pro 2205A-20 is the smallest oscilloscope in the RS Pro range. Connected and powered via USB it offers a bandwidth of 20 MHz and features an arbitrary waveform generator. 

The specifications include a maximum sampling rate of 200 MS/s, software-enhanced resolution up to 12 bits, and high-speed USB streaming up to 1 MS/s for waveform captures of up to 100 million samples in length. Input range is selectable from ±50 mV to ±20 V. The signal integrity, with less than 150 microvolts RMS noise and –50 dB harmonic distortion, makes it suitable for a wide range of analogue and digital applications. The built-in signal source can act as a standard signal generator (sine, square, triangle and others) with programmable sweep or as a 12-bit 1.5 MS/s full-function arbitrary waveform generator.

Despite its small size, the two-channel scope includes an FFT spectrum analyser, 16K samples of segmented capture memory, maths channels, automatic time-domain and frequency-domain measurements, colour persistence and XY display modes, and mask limit testing. Advanced digital triggering produces highly stable waveforms with accurate single-LSB threshold resolution.

The serial decoding function (CAN bus, LIN bus, SPI, I2C, I2S, UART and more) presents results in tabular and colour-coded graphical formats, with powerful filtering, search and export options. The free software for Microsoft Windows 7, 8 and 10 runs on a PC and can be resized to use as much or as little of the screen as required.