If you are evaluating cable and antenna analyzers such as the Anritsu Site Master S820E or Rohde & Schwarz ZVH8, the new Ceyear 3681B is also worth considering as a modern portable solution for RF cable and antenna testing.
Product Overview
The Ceyear 3681B/BU Cable & Antenna Analyzer Series covers a frequency range from 300 kHz to 9 GHz and supports key RF measurements such as cable loss, VSWR and return loss. The analyzer can also detect and locate potential cable or antenna system faults using VSWR, return loss and distance-to-fault measurement functions.
The 3681B is designed as a compact and lightweight handheld analyzer, making it suitable for field installation, maintenance work and testing in confined spaces. Its 10.1-inch LCD capacitive touchscreen provides an intuitive user interface, helping engineers perform measurements quickly and efficiently in the field.
The 3681BU is a compact USB-based cable and antenna analyzer module that communicates via a USB 3.0 interface. Its compact and flexible modular design makes it ideal for portable test systems, RF component testing and communication equipment verification. It is also well suited for automated test environments where high measurement efficiency and system integration flexibility are required.
Main Features
- Practical cable and antenna systems analysis
The analyzer supports return loss and 1-port cable loss measurements.
A distance-to-fault (DTF) function is available for locating faults in cables and antenna feedlines.The TDR cable analysis function helps determine both the location and type of cable fault, such as an open circuit or short circuit.
- Embedded calibration support
One-button embedded calibration improves test efficiency and reduces the need for external calibration kits in selected measurement scenarios.
- Optional optical time-domain reflectometer and optical power meter functions
Optical time-domain reflectometer:
Fiber type G.652, single mode 9/125, measured
Wavelength 1310nm±20nm & 1550nm±20nm, dynamic range value 38dB (typical)
Optical power meter:
Calibration wavelength: 850/980/1270/1300/1310/1490/1550/1577/1625/1650nm,
Measurement range: -50dBm ~+20dBm (typical) (single optical port shared with OTDR)
- User-friendly operation
The 3681B features a 10.1-inch LCD capacitive touchscreen with support for marker dragging and intuitive trace analysis.
The instrument supports up to 8 independent markers, 4 display windows and 8 display traces for flexible measurement analysis.
- Designed for demanding field environments
The analyzer supports an operating temperature range from -10°C to +55°C and a storage temperature range from -40°C to +70°C.
3681B weight (excluding battery): approx. 1.3kg
3681BU weight: approx. 0.4kg
Three display modes — Default, Outdoor and Night — help ensure clear visibility in different working environments.
The built-in high-capacity lithium-ion battery provides up to 4 hours of typical operating time.
Extensive measurement functions and optional capabilities
Antenna, cable and feedline testing analysis:
The 3681 cable & antenna analyzer supports measurement of return loss, VSWR, impedance, cable loss, and distance to faults of cables, feeders, and other DUTs, among which the measurement of return loss and distance to faults will help the user determine the specific causes of performance degradation of the cable and antenna systems system. The antenna, cable and feedline testing analysis function supports TDR test to analyze the types of cable faults. In addition, the instrument is also built in with some commonly used parameters of cables and feeders for ease of use.
USB power measurement (option):
The 3681B cable & antenna analyzer can be used to measure continuous wave signal up to 67GHz when connected to external Ceyear 87233C/D/E/F/LUSB continuous wave power sensors or 87235B/C/D/F/FA/H/LUSB average power sensors.
USB peak power measurement (option):
The 3681B cable & antenna analyzer, when connected via USB interface to external Ceyear 87234D/E/F/L USB peak power sensors and 87236D/E/F/L USB peak power sensors, can be used to measure RF/microwave signals up to 67 GHz, enabling pulse power measurements with a large dynamic range.
Optical time domain reflectometer (option):
The optical time-domain reflectometer of the 3681B cable & antenna analyzer, when connected to an external USB optical time-domain reflectometer, can be used to locate and analyze optical fiber fault points and measure optical power.
Typical applications
Field comprehensive performance evaluation of electronic equipment
The 3681B cable and antenna analyzer has many advantages, including a high performance index, fast sweep speed and simple operation. It is handheld, small and lightweight, and has excellent environmental adaptability. It can be powered by batteries and is ideal for the field installation, commissioning and maintenance of electronic equipment.
Multi parameter testing for cable TV, wireless communication, etc.
The 3681 series cable & antenna analyzer is applicable to operators and equipment manufacturers in cable TV, cellular phone systems, digital mobile telecommunication operators and equipment manufacturers for on-site integrated tests of antenna, cable and feedline testing contact performance, component S-parameters and feedthrough power.
Building of multi channel S11 parameter test system
The 3681BU cable & antenna analyzer is a compact, efficient and flexible USB bus module product. It can be used to build multi-channel S11 parameter test systems on production lines, providing users with a low-cost S11 parameter test system integration solution.
Where to Buy:
🔵 3681B/BU Cable & Antenna Analyzers are now available in the EU through SEA Components GmbH, an authorised Ceyear supplier (tm@sea-ceyear.com).
