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LibreCAL Introduction:- LibreCAL is open source hardware, we have published all the production files, you can also make your own, but you need a professional metrology calibration and VNA for calibration. The LibreCAL we sell has been calibrated with metrology grade calibrators, and the S11 directivity is better than 50dB within 3GHz and better than 40dB above 3GHz, which is better than some mechanical calibrators that cannot provide calibration parameters, but it is important to note that even after rigorous calibration. Due to leaks inside the electronic calibrator, the electronic calibration cannot be performed and can be manually added using the mechanical calibration if necessary. Since LibreCAL is specifically designed for LibreVNA, internally stored calibration parameters can currently only be recalled by LibreVNA, and LibreCAL cannot currently be used for other VNA calibrations.- Verify the orientation of the electronic calibrator with mechanical calibrators and add additional isolation calibrations.
LibreCAL Description:- LibreCAL is the electronic calibration part of the LibreVNA.- Calibrator can be quickly and easily called up directly in the LibreVNA-GUI, eliminating the need for tedious manual work with mechanical calibrators.
LibreVNA Specifications:
Impedance: 50Ω
Test Port Connector: SMA, female
Number of Test Ports: 2
Frequency Range: 100kHz to 6GHz
Frequency Accuracy: ≤2ppm
Number of Measurement Points: 2 to 4501
Speed (2-port, 4000 points): 10Hz to 50kHz
Dynamic Range (IFBW 10Hz):
100 dB up to 3GHz
50 dB from 3GHz to 6GHz (Note 1)
Measurement Parameters: S11, S12, S21, S22
Reflection Directivity: >40 dB (after calibration, Note 2)
Output Power: -40 dBm to 0 dBm (Note 3)
Power Supply: DC 5V, 1.5A (USB-powered or 3.5mm connector)
Power Consumption: Approx. 7W
Interface: USB type-C
Supported Operating System: Windows, Linux, mac0 OS (64-bit software only)
External Reference Input: SMA female; 10 MHz
External Reference Output: SMA female; 10 MHz or 100 MHz
Additional Functions:
Simple spectrum analyzer
Signal generator (not precisely calibrated)
Note:
1. Due to structural limitations, S12 isolation is 10dB worse than S21. Above 3GHz, the performance decreases with increasing frequency, and the port isolation is only 50dB at 6GHz. Below 1MHz, the performance decreases with decreasing frequency, and the effective dynamic decreases to 70dB at 100kHz.
2. The use of higher accuracy calibrators allows for higher precision measurements.
3. The output power may decrease when the frequency is lower than 1MHz or higher than 3GHz.
LibreVNA Features:
1. Wide Frequency Range and High Accuracy:
Supports frequencies from 100 kHz to 6 GHz with exceptional accuracy of ≤2ppm, making it suitable for various RF and microwave applications.
2. Enhanced Port Isolation:
Newly improved 6-layer PCB version achieves port isolation above 90dB below 3GHz, enabling higher precision measurements even in high-frequency harmonic scenarios.
3. Robust Dynamic Range:
Provides dynamic ranges >100 dB below 3GHz and >50 dB up to 6GHz, delivering consistent performance across a wide spectrum.
4. Versatile Connectivity:
Equipped with SMA female connectors and adjustable External Reference Input/Output, supporting multiple standardized setups.
5. Cross-Platform Compatibility:
Fully compatible with Windows, Linux, and mac0 OS, allowing users from diverse platforms to operate seamlessly.
Package Included:
LibreCAL Version:
1 x Electronic Calibrator
1 x USB Type-C Data Cable
4 x Cables
or
LibreVNA Version:
1 x Main Unit
1 x USB Type-C Data Cable
1 x USB to 3.5mm Power Cable
2 x 30cm SMA SS405 Test Cables
1 x SMA Male Calibration Kit - OPEN
1 x SMA Male Calibration Kit - SHORT
2 x SMA Male Calibration Kits - LOAD
2 x SMA Male-to-Male Connectors
2 x SMA Female-to-Female Connectors
1 x English User Manual
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