OSA103 Mini
PC based USB multifunction measuring device


  • Multi channel mixed signal oscilloscope.
  • Multi function generator.
  • Frequency meter.
  • Spectrum analyzer.
  • Frequency response analyzer.
  • Vector antenna analyzer.
  • LC Meter.
  • Reflectometer.
  • SDR transceiver.


1 analog channel + 4 digital channels + generator channel.
Analog channel input impedance – 50 ohms,
Analog channel bandwidth – 1 Hz .. 400 MHz (AC coupling only).
Analog channel real time sample rate – 200 MHz.
Equivalent time sample (ETS) rate – 10 GHz.
Memory depth – up to 40k samples.

Base input sensitivity – 0.1 V/Div.
Digital channels with adjustable threshold levels and real time sampling rate of 1.6 GHz.
Advanced flexible fully digital synchronization.
Fully digital ETS mode that provides stable synchronization from noisy and high frequency (up to 800 MHz) signals.
Peak detector and high resolution mode. 

Function Generator 0.001 Hz .. 50 (100) MHz (50 MHz – with flatness better than 0.5 dB).
AM, FM, PM modulation and signals 
summation. Built-in modulation generator 0.001 Hz .. 100 MHz.
Oscilloscope synchronous frequency sweep mode.
generator 5 ns – 5 s, noise generator and arbitrary waveform generator with scripting language to describe waveforms.
Small overshoot/undershoot and high slew rate of
pulse signals.
Extra multifunctional digital output.

Frequency meter.
The hardware frequency counter can work with any input channel, as well as with the condition of the oscilloscope synchronization. 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 аdjustable FFT size, 9 window functions, averaging and scaling for different impedances, an advanced algorithm for accurate measurements of the peak level and frequency, clean internal spectrum (without parasitic spectral components). Subtractive dither technology is used to improve perfomance.

Frequency response analyzer.
Principles of operation – frequency sweep and tracking synchronous digital quadrature receiver.
Аmplitude and phase characteristics, linear and logarithmic scales, customizable range.
Calibration (amplitude and phase normalization).
Frequency range 100 Hz .. 100 MHz.
Dynamic range (10 kHz .. 60 MHz) is more than 90 dB.
Can work as a spectrum analyzer. 

Vector antenna analyzer.
Principles of operation – frequency sweep and tracking synchronous digital quadrature receiver.
Measuring complex impedance of a connected circuit 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 Zo = 25, 50, 75, 100 ohms.
Measurement (calculation) Q, Rs, Xs, | Z |, Phase Z, Rp, Xp.

LC meter.
Capacitance measurement range – 0.5 pF .. 30000 uF.
ESR measurement range (C> 0.5 uF) – 0.050 Ohm .. 1 kOhm.
Inductance measurement range – 50 nH .. 3 H.

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

Reception mode (HF bands):
ADC Sampling – 200 MSPS, 8 bit.
MDS(500 Hz) – -97 dBm.
ADC overflow level – +2 dBm.
Input frequency range 3 dB flatness (through Nyquist zones, filters required) – 1 Hz .. 400 МНz.
IMD3 – 60..70 dB.
Panadapter maximum span – 65 kHz.

Transmition mode:
Max. output power – +5 dBm.
Output frequency range 1 dB flatness – DC..60 MHz.
AM, FM, LSB, USB, CW modes.
For voice transmittion you will need an external mic. amp. and commutation to the input of the device (mic. or ant.).

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