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The SARK-110 is a completely new design concept for an Antenna Analyzer. This is a truly pocket size device, so you can take it anywhere. It offers a gorgeous 3 high-resolution, active-matrix color display that allows information-rich diagrams.
Its small size does not mean compromising the features and measurement performances. It has a frequency range from 0.1 to 230 MHz with 1 Hz of resolution. It has full vector measurement capability and accurately resolves the resistive, capacitive and inductive components of a load. The accuracy is excellent over a broad range of impedances and rivals any of the competitive devices in the market, see Load Measurements. The provided Open / Short/ Load calibration ensures the highest level of measurement accuracy. There is a transmission line calculator feature that allows adding or subtracting the effect of feed lines.
The functionality of the SARK-110 is not restricted to antenna analysis, but it is a multifunction instrument featuring a TDR (Time Domain Reflectometer) mode which is intended for fault location and length determination in coaxial cables as well as a programmable RF signal generator. The analyzer is intended for standalone operation but also operates when connected to a personal computer in combination with SARK Plots client software for Windows, further enhancing the device`s capabilities.
The SARK-110 allows you to quickly analyze any antenna over a user defined frequency range. In real time, you can see at a glance the resonant frequencies of the antenna, the VSWR, the complex impedance, reflection coefficient, return loss, and R-L-C as series or parallel equivalent circuits. You can test and tune coaxial cables and phasing stubs. You can adjust and test RF matching networks, antenna tuners, and RF amplifiers without applying power. Besides you can measure the impedance of components such as inductors, capacitors, and traps at RF frequencies. As a signal generator it is ideal for receiver calibration, sensitivity tests and signal tracing.
The user interface has been designed to be intuitive and easy to use. On screen menus provide user guidance and the operation is mainly controlled by the two navigation keys. The graphical impedance displays provide a quick view of the antenna impedance characteristics on a user selected frequency range. This includes the graphical plot of two user selectable parameters in a scalar chart or a complex reflection coefficient in Smith chart form. To help speed up measurements, two markers are available, both of which are user positionable or can operate in automatic tracking mode.
The Multiband mode is a unique feature of the SARK-110 whereby it is able to display simultaneously the plot of an impedance parameter in four scalar charts. This feature is ideal for tuning multiband antennas.
The SARK-110 provides a single frequency measurement mode that presents the complete impedance parameters at a user selectable frequency. To facilitate the reading, the analyzer displays graphically the R-L-C as both series and parallel equivalent circuit and the SWR as a convenient bar graph.
The analyzer uses an internal 2MB flash disk for the storage and recall of measured parameters, screenshots, analyzer configuration and firmware updates. This disk is accessible via USB so the measured parameters can be downloaded to a PC for analysis using the ZPLOTS spreadsheet program or the SARK Plots client software for Windows.
The SARK-110 is as well a hackable device. You can experiment with the device by writing an application using the provided open-source SDK. Besides the SDK includes a device simulator for the PC so you can easily debug your application before loading to the device. For more advanced users, the SARK-110 board provides connections to the STM32 SWD interface so you can use the ST-Link in-circuit debugger or equivalent to program or debug your software.
With its pocket size, features, and simple user interface the SARK-110 offers a perfect device for HF/VHF impedance measurements for the RF experimenter and for the amateur radio operator. Whether you are at home in your shack or in the field during a field day or expedition.
General |
· Frequency range: 100 kHz to 230 MHz · Frequency resolution: 1 Hz · Frequency stability: ± 30 ppm · Sine wave output · RF Connector: MCX socket · Output power: »-10 dBm (0.1mW, 70.7mV rms) into a 50-ohm load · Sweep time (Scalar Chart/Smith Chart/Field Mode): 3 seconds (Sampling: Normal), 5 seconds (Sampling: Double), 1.5 seconds (Sampling: Normal - Res. 1/2), < 1 second (Sampling: Normal Res. 1/4 and 1/8) · Sweep time (FDR): 6 seconds · Frequency Resolution: 258 points per sweep (258 to 10000 in deep sweep mode) · Return loss dynamic range: 0 to -60 dB · VSWR dynamic range: 100:1 maximum · Impedance reading in open circuit: 60000 (@1 MHz) · Measurement limits: |Z| < 100K, |R| < 100K, |X| < 100K, |Rho| < 0.98, C < 100 nF, L < 100 mH, -180 < ? < 180 |
Measured Parameters |
Complex impedance (series and parallel) and reflection coefficient in rectangular and polar form, VSWR, return loss, reflection power percentage, quality factor, equivalent capacitance, equivalent inductance |
Operating Modes |
Scalar Chart, Smith Chart, Single Frequency, Cable Test (TDR), Field, Multi-band, Signal Generator, Computer Control and Band Scan |
Features Common To Most Modes |
· Presets for amateur radio bands · Adjustable reference impedance · Save to disk and recall functions · Three available fixed scale options and automatic scaling · Presets for popular coaxial cables · Add/subtract transmission line · Black or white color schemes · Adjustable plot trace widths |
Scalar Chart Mode |
· Graphical plot of two user-selected parameters in a rectangular chart · Two markers with manual or automatic positioning · Display detailed parameters for center frequency or any of the two marker positions |
Smith Chart Mode |
· Plots complex reflection coefficient in Smith Chart form · Two markers with manual or automatic positioning · Display detailed parameters for center frequency or either of the two marker positions |
Single Frequency Mode |
· Display all parameters for a single frequency · Graphical representation of series and parallel impedance equivalent · VSWR Audio feedback · Circuit models and automatic LC matching network calculator |
Cable Test Mode |
· Range: about from 2 to 250 m · Displays step and impulse responses |
Field Mode |
· Graphical plot of one user-selected parameter in a scalar chart with enhanced legibility · Display max and min values |
Multi-band Mode |
Display rectangular charts for four bands simultaneously |
Signal Generator Mode |
· Frequency range: 1 kHz to 230 MHz · Programmable output level from -73 dBm to -10 dBm into a 50-ohm load · Continuous, frequency sweep, AM and FM modulation modes · Linear, logarithmic, bi-linear, and bi-logarithmic sweep modes |
Markers |
Tracking modes: Peak Min, Peak Max, Absolute Min, Absolute Max , Value Cross Any, Value Cross Up, Value Cross Down |
Interface |
· Full color 3 TFT LCD 400 x 240 pixels · 4 dedicated buttons · 2 navigation keys |
PC Interface |
· USB Mini-B receptacle · USB 2.0 Full Speed Composite Device: o Mass Storage Class (internal disk) o HID Class (Computer Control mode) |
Storage |
· 2 MB internal disk FAT compatible · USB Mass Storage · Screenshot save and recall feature · Measurement data save and recall feature · Possibility of files with user definable frequency presets, scale settings, and three custom cable types · Measurement data files compatible with SARK Plots and ZPLOTS programs |
Calibration |
· Automated Open/Short/Load calibration with up to eight stored profiles · 400 calibration points · Frequency calibration |
Measurement Architecture |
· Single conversion superheterodyne · Two independent measurement channels for simultaneous voltage and current measurement for precise phase measurement · Two synchronized 12-bit analog to digital converters |
Processor |
72 MHz STM32 MCU with 256KB Flash and 48KB SRAM |
Power |
· 3.7V 1000mAh Internal Lithium-Polymer battery · USB for operation and charging · Automatic Power Off functionality (disabled, 5, 10, or 30minutes) · Autonomy: approx. 2.5 hours · Charge time: approx. 3.5 hours |
Environment |
Operating temperature: 0ºC to 50ºC |
Dimensions |
98 * 60 * 14.5 (mm) |
Weight |
120g |
Package Content |
· SARK-110 x 1 with built-in battery · MCX to SMA female connector adapter x 1 · SMA plug to SMA female 8 (20-cm) cable adapter x 1 |
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