Omschrijving
STEMlab 125-14 (originally Red Pitaya V1.1) is an open source measurement and control tool in size of a credit card (dimensions: 107 x 60 x 21 mm). It can replace many expensive laboratory measurement instruments. The STEMlab 125-14 unit is a network attached device based on Linux operating system. It includes Radio Frequency signal acquisition and generation technologies, FPGA, Digital Signal Processing and CPU processing. The STEMlab 125-14 unit is equipped with a Micro USB socket used for console connection, a microSD slot for microSD memory card, a RJ45 socket for Ethernet connection and a USB socket used for standard USB devices.
Features:
• High performance hardware at a surprising price tag.
• Replaces most essential instruments: (Oscilloscope, Spectrum analyser, Signal generator, LCR meter)
• LAN or wireless access from any WEB browser via tablet or a PC regardless of the OS (MAC, Linux, Windows, Android, iOS).
• LabView and MATLAB® interface.
• Possibility to make your own application and share it with others.
• Open source software.
RF inputs:
• Number of channels: 2
• Bandwidth: 50 MHz (3 dB)
• Sample rate: 125 Msps
• Input impedance: 1 M? / 10 pF
• Connector: SMA-F
RF outputs:
• Number of channels: 2
• Bandwidth: 50 MHz
• Sample rate: 125 Msps
• Load impedance: 50 ?
• Connector: SMA-F
Auxiliary analog input channels:
• Number of channels: 4
• Nominal sampling rate: 100 ksps
• ADC resolution: 14 bit
• Input voltage range: 0 to +3.5 V
• Input coupling: DC
• Connector: IDC connector
Auxiliary analog output channels:
• Number of channels: 4
• Output type: Low pass filtered PWM
• PWM time resolution: 4ns (1/250 MHz)
• Output voltage range: 0 to +1.8 V
Dimensions: 107 x 60 x 21 mm
Calibration:
Calibration is performed in noise controlled environment. Inputs and outputs gains are calibrated with 0.02 % and 0.003 % DC reference voltage standards. Input gains calibration is performed in medium size timebase range. STEMlab 125-14 is non-shielded device and its inputs/outputs ground is not connected to the earth grounding as it is in case of classical Oscilloscopes. To achieve calibration results given below, STEMlab 125-14 must be grounded and shielded.
| Inputs | | | |
| LV settings (+/- 1 V range) | | LV settings (+/- 1 V range) | |
| DC gain accuracy @ 122 kS/s | DC offset @ 122 kS/s | DC gain accuracy @ 122 kS/s | DC offset @ 122 kS/s |
| 0.2 % | +/- 0.5 mV | 0.4 % | +/- 2 mV |
| Outputs | | | |
| DC offset | | DC gain accuracy | Ripple @ 0.5V DC |
| +/- 4 mV | | 0.4 % | 0.4 mVpp |
Kit contents:
• 1x STEMlab 125-14 board with calibrated Inputs and Outputs
• 1x Aluminium case
• 1x micro USB power supply adaptor
• 1x microSD card (4 GB) with pre-installed OS
• 1x Ethernet cable (1 m)
• 2x Osciloscope probes
• 2x SMA to BCN adapter
• 2x 50 ohm termination
• 2x SMA T adapter
• 1x WIFI dongle
