Feature: 1. 4 INTERFACES: The antenna analyzer has 4 interfaces, single point measurement, scan, system information and calibration, default single point measurement interface initialization. 2. CALIBRATION FUNCTION: The one time calibration option will automatically switch to user calibration, and during calibration process, the automatic shutdown function will be disabled. 3. EASY OPERATION: Hold down the CTRL button to power off, press the power switch button, and simultaneously press the second button and the power button to power on. 4. WORKING RANGE: This antenna analyzer operates in the frequency range of 35mhz‑2.7ghz, can measure resistance, reactance, standing and S11, with high accuracy and stability. 5. CLEAR DISPLAY: Adopts 2.4in TFT display with a resolution of 320x240, and adopts aluminum alloy shell, which is resistant to wear and corrosion, and has a long service life. Specification: Item Type: Antenna Analyzer Meter Model: PS200 Material: Aluminum Alloy Frequency: 34.375mhz-2.7ghz Spacing: 1khz Display: 2.4in TFT resolution 320x240 (QVGA) Battery: 1 x 306090 3.7V 2000mAh polymer lithium battery (with built in battery) Power Consumption: <1.5W Charging Current: 400ma Charger Port: USB Charger PC Only Auto Power Off: Adjustable (Normally Open; 5-60min) Measurement Parameters: Measurement Parameters: Resistance, reactance, standing, s11 Resolution: 4 significant digits Frequency Accuracy: <±3ppm Connector: SMA K Measuring Range: Impedance: 0.1-1000Ω (absolute impedance value); Standing: 1.000 65; S11 (Db): 0.1db-60db Error (single Point Measurement): Impedance: < Absolute value of impedance x 5% 0.0.1Ω (z <200Ω, <1.5ghz) Permanent: < Effective reading x 10% ± 0.1 S11 (Db/°): 0.1 db/5° (0db~-10db); Db/°: 1db/10° (-10db~-20db), 5db/20° (-20db~-40db) Directivity: <35db (140Mhz-2Ghz calibration); <30db (2ghz-2.7ghz) Scan Points: 280 Output Level: -18dBm Working Temperature: 0-40℃ Atmospheric Pressure: 860-1060hpa. Package List: 1 x Antenna Analyzer 1 x Data Cable 1 x User Manual Note: 1. To ensure the accuracy of measurement and calibration, please warm up the instrument for at least 15 minutes.2. Try to use good quality RF cables and connectors.3. Cables marked with next calibration may not require calibration and be used directly.4. The test pen process affects the measurement accuracy. It is recommended not to choose too long test leads as much as possible.5. Before measurement and calibration, please make sure that you are not in a strong wireless signal, so as not to cause interference due to inaccurate measurement.6. If you do not understand the impedance measurement itself, you can refer to the instructions and tutorials of the vector network analyzer. This instrument is equivalent to a single port vector network analysis.