Chose single-mode over multimode for a 300ft run, fiber tester saved my butt

Last week I had to pick between using the leftover OM3 spool or pulling new single-mode for a warehouse camera install. Went with the single-mode because the distance and future upgrades made sense, but my cheap laser source showed 2.3dB loss at the first splice. Has anyone else dealt with contractors who swear multimode is fine for long runs?

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wade7676d ago

That 2.3dB loss at the splice is a red flag. Did you re-terminate or just leave it? I've seen guys polish a connector twice and still get bad readings. The real question is how much loss you're seeing at the ends, not just the splice. If the launch cable is dirty or the reference is off, that number could be lying to you. So did you fix the splice or just push through since it was under your 3dB budget? Sounds like the tester earned its keep.