by Pj
I had a post awhile ago, maybe there are some new members who might have an answer.
Is/was there an industry standard, or specific railroad standard for outputting a PL tone with defect detectors on a no-defect or defect detected? On the ex-CR Southern Tier near me, a PL of 100.0 is transmitted and correctly programmed railroad spectra's are capable of displaying "NO DEFECTS" on the display. The railroad spectra is able to decode up to two PL tones for this feature. I have not figured out the "defect" PL is for these detectors.
So in short, does anyone know what PL's for what message are used by who/where?
Is/was there an industry standard, or specific railroad standard for outputting a PL tone with defect detectors on a no-defect or defect detected? On the ex-CR Southern Tier near me, a PL of 100.0 is transmitted and correctly programmed railroad spectra's are capable of displaying "NO DEFECTS" on the display. The railroad spectra is able to decode up to two PL tones for this feature. I have not figured out the "defect" PL is for these detectors.
So in short, does anyone know what PL's for what message are used by who/where?