STS-CFA (Cable Force Analysis application) utilizes vibration measurements to assist with computing accurate in-situ cable tension forces using the Taut Cable Vibration Method (TCVM). Typically, STS-CFA is run side-by-side with STS-LIVE and enables field crews to immediately measure and adjust cable tensions to within their required specifications.

For software support, click ( ? ) in the bottom-right corner.

Features & Applications

How it Works

As an example, a hoist system consisting of 12 parallel cables is to have the overall load distributed equally throughout the group within a specified percentage. To simultaneously determine the 12 individual forces, accelerometers are quickly mounted on each cable which are in turn “activated” by hitting them with a rubber mallet. The resulting accelerations are recorded with STS-LIVE and immediately uploaded into STS-CFA which calculates the individual forces and their deviation from the average. This information immediately indicates how much each cable must be adjusted to bring them into compliance.


  • Auto excitation detection that identifies moment the cable begins to vibrate
  • Auto peak finding algorithm that identifies cable’s the fundamental frequency of vibration
  • Automatically selects the data range to be used for the FFT time-to-frequency transformation
  • Easy-to-use graphical interface for verifying peak locations
  • Cable properties input screen to allow for direct force calculation
  • Output cable force data in spreadsheet format
  • Use alongside other data acquisition systems


  • Balancing cable forces for bridge and lift gate counterweights.
  • Measuring cable support forces for bridges, radio towers, and industrial chimneys
  • Estimated in-situ forces on bridge stay cables or vertical hanger cables
  • Balancing hoist cable loads for river control structures



  • Automatically detects and configures STS4 hardware for Intelliducer sensor support
  • Quickly configure sample frequencies, test durations, and other data acquisition parameters
  • View recorded data in real time
  • Adjust sensor excitation voltages and gains stages
  • Automatically detects and supports STS4 Automatic Load Position Tracker (STS4-ALPT)
  • Automatic zeroing option
  • Seamlessly supports multiple Wireless Base Stations (STS4-WBS)
  • Temperature compensation for sensors equipped with thermistors
  • Real-time data filtering
  • Control the Standby, Snooze, and Sleep power-saving modes
  • TDMS data format allows easy importation into STS-VIEW, STS-CFA, or spreadsheet
  • Designed for Windows® 10 and newer Operating Systems