This is an antenna analyzer for ham radio hobbyists. It can measure 50 ohms source impedance with the error of (+/-)1 ohm. It is also a meter for standing wave, impedance, capacitance...

Features:
Frequency generation & control: 1-60MHz.
External power: 2.1mm power jack(center pin positive).
5 operation buttons, easy and convenient to operate.
Installed black metal case, just connect the power(not included) and then work.
Step size: user configurable increments of 100Hz, 1KHz, 10KHz, and 100KHz.
Support measuring data waveform analysis via connecting computer with USB cable(not included).

Applications:
Measure antenna electrical parameters: SWR, impedance(resistance+reactance), capacitance, inductance;
Measure feed point impedance;
Measure ground loss;
Adjust antenna tuners and determine loss;
Measure inductors and capacitors;
Measure coax transmission line(SWR, length, velocity factor, approximate Q and loss, resonant frequency, and impedance);
Measure and determine optimum settings for tuning stubs: SWR, approximate Q, resonant frequency, bandwidth, impedance;
Determine characteristic impedance of transmission line;
Measure magnetic loop resonance and SWR;

Operation Buttons Definitions:
MODE: select operation mode: impedance(default), complex impedance, capacitance, and inducatance
BAND: select band from any of the available bands: 160M to 6M
CONFIG: provide menu for configurations and extended functions: PC Link, step size setting, suspend timeout setting, calibration, and software upgrade
SCAN: press this control to initiates a scan of frequencies of the selected BAND. Scan exits to impedance mode showing the 2:1 bandwidth and the resonant point o the antenna
CAN(up): increase frequency and used to cancel operation for CONFIG menu
VAL(down): decrease frequency and used to validate operation for CONFIG menu

Specifications:
Frequency Generation & Control: 1-60MHz
Source Impedance: 50 ohms
Stability: (+/-) 100 ppm
Spectral Purity: Harmonics Down >- TBD dB beyond 60MHz
Step Size: User configurable increments of 100Hz, 1KHz, 10KHz, and 100KHz
Usable Measurement Range: SWR: 1.0 to 9.99
Impedance: Approx. 5 to 2000 ohms
RF Output: Adjustable: 2.0 Volts pp (typ)
RF Out: BNC
Connectors: RF
Power Supply(NOT Included): Powered by External: DC 12-14V, 500mA
External Power: 2.1mm Power Jack (center pin positive)
USB Interface: Mini USB Receptacle
Item Size: 14.8 * 8.7 * 3.3cm / 5.83 * 3.43 * 1.3in (L * W * H)
Item Weight: 536g / 18.91oz

Package List:
1 * ANT SWR Antenna Analyzer

English User Manual:
https://www.dropbox.com/s/z2t3t73lwpsq3ha/SARK100 User Manual.pdf?dl=0

Software Installation:
https://www.dropbox.com/s/wl7vvd2gobm4xaf/WinPCC-Sark100 EN V0.8.exe?dl=0