Chelegance SV4401A VNA 50kHz–4.4GHz Network Analyser

The Chelegance SV4401A is a portable dual-port vector network analyser covering 50 kHz to 4.4 GHz. Designed for antenna builders, amateur radio operators and RF engineers, it provides practical S11 and S21 measurements for antennas, coaxial cables, filters, duplexers, couplers, power dividers and amplifier signal paths. Large 7-inch touchscreen A high-brightness 7-inch IPS capacitive touchscreen with 1024 × 600 resolution provides a clear view of traces, markers and measurement results. The touchscreen is supported by four physical controls, making the SV4401A comfortable to use on the bench or in the field. Dual-port RF analysis The SV4401A supports reflection and transmission measurements with display formats including Log Mag, phase, Smith chart, VSWR and group delay. It offers an S21 dynamic range of 75 dB below 3 GHz and an S11 dynamic range of 50 dB below 3 GHz. Key features Wide frequency coverage: 50 kHz–4.4 GHz Dual-port S11 and S21 measurements 7-inch high-brightness IPS capacitive touchscreen 1024 × 600 display resolution Up to 1,001 configurable sweep points Sweep speed up to 400 points per second above 140 MHz Built-in TDR for cable-length checks and transmission-line diagnostics N-type female RF connectors Eight markers and nine traces Built-in 8 GB storage for calibration files, measurement data and screenshots Metal enclosure with rear support for desktop operation USB Type-C charging and data connection Supports firmware updates and PC software Technical specifications Frequency range: 50 kHz–4.4 GHz RF output level: −42 to −12 dBm, adjustable in 1 dB steps Maximum RF input: 0 dBm; DC input below 5 V RF connectors: N-type female Frequency accuracy: Better than ±1 ppm below 140 MHz; better than ±5 kHz above 140 MHz S21 dynamic range: 75 dB below 3 GHz; 60 dB above 3 GHz S11 dynamic range: 50 dB below 3 GHz; 40 dB above 3 GHz Sweep points: 101–1,001 IF bandwidths: 12.5 kHz, 6.25 kHz, 3.12 kHz, 1 kHz, 300 Hz, 100 Hz and 30 Hz Display: 7-inch IPS LCD, 1024 × 600 Storage: Built-in 8 GB TF card Battery: Two built-in 3.6 V, 3,350 mAh 18650 cells Typical battery life: Up to four hours at 50% display brightness Power consumption: 5 W Charging input: 4.7–5.5 V via USB Type-C; 5 V / 2 A recommended USB power output: 5 V / 1 A Dimensions: 190 × 130 × 30 mm, excluding RF connectors Weight: Approx. 1.15 kg for the instrument Operating temperature: 0–45°C Package contents Chelegance SV4401A main unit Two N-male to SMA-female adapters Open, short and load calibration kit Two SMA-female to SMA-female connectors One SMA-male to SMA-male connector 50 cm RG316 coaxial cable USB Type-C cable Carrying case Charging note: Chelegance specifies a USB-A-to-USB-C cable for charging. A USB-C-to-USB-C cable might not charge the instrument correctly. Input protection: Do not exceed the specified maximum RF or DC input limits. Disconnect transmitters and discharge circuits before connecting the analyser.