Model 344, Short Finder and Spectrum Analyzer
FIND TRACK CIRCUIT SHORTS
Shorted Insulation, Banding Hidden in Ballast, Shorted Bridge Deck or Retarder Insulation, Contaminated Ballast
Test Track Insulation
Can Be Used to Locate Line or Cable Shorts
Locate High Resistance Bonds
Determine Ballast "Quality"
Test Resistance of Testing Shunts
Determine Voltage of Track Circuits, Both AC & DC
Using the Spectrum Analyzer, determine Frequency and Voltage Level of any AC Signal on the Track
View the pdf below for full details