OSA103 Mini
PC based USB multifunction measuring device



  • Multi-Channel Mixed Signal Oscilloscope
  • Multi-Function Generator
  • Frequency Meter
  • Spectrum Analyzer
  • Frequency & Phase Response Analyzer
  • Vector Antenna Analyzer (single port VNA)
  • LC Meter
  • Reflectometer
  • SDR Transceiver


1 analog channel + 4 digital channels + virtual analog generator channel.
Analog channel input impedance: 50 Ohms.
Analog channel bandwidth: 1 Hz … 400 MHz (supports only AC coupling).
Analog channel real time sample rate: 200 MSPS.
Equivalent time sample (ETS) rate: 10 GSPS.
Memory up to 40,000 samples per channel.

Basic input sensitivity: 0.1 V/Div.
Digital channels have adjustable threshold levels and a real time sampling rate of 1.6 GSPS.
The analog generator channel provides a visualisation of the generator output and can also be used as a triggering source.

Additional flexible fully digital triggering modes.
Fully digital ETS mode that provides stable triggering from noisy and high frequency (up to 1 GHz) signals.
Peak detector and a high resolution mode.

Function Generator: 0.001 Hz … 50 MHz within +/- 0.5 dB flatness.
Usable to 100 MHz with less flatness.
AM, FM, PM modulation and signals 
summation. Built-in modulating signal generator: 0.001 Hz … 100 MHz.
Frequency sweep in synch with the oscilloscope sweep.
generator 5 ns … 5 s, noise generator and arbitrary waveform generator with script language describing waveforms.
Small overshoot/undershoot and high slew rate
pulse signals.
Auxiliary multi-functional digital output.

Frequency Meter
The hardware frequency counter can work with any input channel, as well as with the oscilloscope trigger. It has 8 digits in the frequency counter mode and a constant relative accuracy over the entire range (reciprocal counting). It can count pulses and measure a period. The adjustable temperature compensated system clock generator (VCTCXO) provides accuracy better than 1 PPM.

Spectrum Analyzer
Principles of operation – FFT, combined multi-frequency FFT that forms spectrogram up to 1 GHz without aliasing. The spectrum analyzer has adjustable FFT size, 9 window functions, averaging and scaling for different impedances, an advanced algorithm for accurate measurements of the peak level and frequency, pure own spectrum (no internal parasitic spectral components). Subtractive dither technique is used to improve performance.

Frequency & Phase Response Analyzer
Principles of operation – frequency sweep and tracking synchronous digital quadrature receiver.
Amplitude and phase characteristics, linear and logarithmic scales, customizable range.
Calibration (amplitude and phase normalization).
Frequency range: 100 Hz … 100 MHz.
Dynamic range: 90 dB (10 kHz … 60 MHz).

Vector Antenna Analyzer (single port VNA)
Principles of operation – frequency sweep and tracking synchronous digital quadrature receiver.
Measuring of the complex impedance of a DUT using shunt-
thru method.
Frequency range: 10 kHz … 100 MHz.
OSL calibration and “mathematical subtraction” of the connecting cable.
Measurement (calculation) VSWR, Return Loss for cables 
(lines) with user defined  Zo in the range of 10…320 Ohms. 
Measurement (calculation) Q, Rs, Xs, | Z |, Phase Z, Rp, Xp.

LC Meter
Measures capacitance, capacitor effective series resistance (ESR) and inductance.
Capacitance range: 0.5 pF … 30000 uF.
ESR range (C> 0.5 uF): 0.050 Ohm … 1 kOhm.
Inductance range: 50 nH … 3 H.

SDR Transceiver
The device can operate as a DDC / DUC transceiver in conjunction with SDR programs supporting Winrad API. Tested with HDSDR, Zeus Radio ver 2.9.3, SDRuno, SDRSharp ver 1361.

Parameters in receive mode (HF bands)
ADC Sampling: 200 MSPS, 8 bit.
MDS (500 Hz): -97 dBm.
ADC overflow level: +2 dBm.
Input frequency range: 1 Hz … 400 МНz with 3 dB flatness (unfiltered input, anti-alias filters required).
IMD3: 60…70 dB.
Panadapter maximum span: 65 kHz.

Parameters in transmission mode
Max output power: +5 dBm.
Output frequency range: DC…60 MHz with 1 dB flatness.
AM, FM, LSB, USB, CW modes.
Transmission mode is fully implemented in the module and requires connection of an external microphone amplifier for voice.

The device is powered from a USB port and requires no additional power supply.