Signaling via "Coded Track Pulse Time"

CharlieSOGR Forum Member

Do railroads still use "coded track pulses" to do any of their signaling?
I ask because I have a Simpson TS111-3 Railroad Tester, and I was wondering whether they still had any practical use.
The sales sheet is attached.

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simpson_ts111-3_data_sheet.pdf

4/30/167:09 PM

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