User Manual

SARK-110-ULM User’s Manual

Rev 1.0 June 22

1 Introduction

1.1 Overview

The SARK-110-ULM antenna analyzer is a multipurpose, precision instrument capable of

analyzing antennas or networks, generating or detecting signals and performing Time-Domain-

Reflectometry (TDR) measurements on transmission lines, in a frequency range between 0.1

and 160 MHz and up to 700 MHz with reduced performances.

Typical applications include checking and tuning antennas, impedance matching, components

test, cable fault location, measuring coaxial cable parameters, and cutting coaxial cables to

precise electrical lengths. As a signal generator, it is ideal for receiver calibration, sensitivity tests

and signal tracing.

The user interface, based on a monochrome graphic display, has been designed to be intuitive

and easy to use. The graphical impedance displays provide a quick view of the antenna

impedance characteristics on a user-selected sweep range in XY or Smith chart formats. Other

displays provide the detailed impedance parameters at a single frequency, SWR graph at a

single frequency or a multi-band mode that displays VSWR at four frequency points.

The analyzer 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.

The measurement reference plane is automatically adjusted via the Open/Short/Load calibration

procedure for higher measurement accuracy. Also, the analyzer implements a transmission line

addition or subtraction feature in order to make antenna measurements while discounting the

effect of the feed line.

The analyzer uses an internal 2MB flash disk for the storage and recall of measured parameters,

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 SARK Plots client software for

Windows or Android; or ZPLOTS spreadsheet program.

The SARK-110-ULM can be controlled from your computer via the USB interface using SARK

Plots software for Windows; or via USB or wireless short-range Bluetooth interfaces using SARK

Plots software for Android. Third party software for controlling the analyzer is also available.

The SARK-110-ULM is upgradeable. As necessary, new firmware releases are made available

at this site free of charge.

Please let us have your suggestions through the website http://www.sark110.com as we are

highly motivated to extend this device’s functionality, based on community requests.