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OFC യുടെ സവിശേഷതകൾ പരിശോധിക്കാൻ ഇനിപ്പറയുന്നവയിൽ ഏതാണ് ഉപയോഗിക്കാനാവുക?

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ALP CBT 2 Electronic Mechanic Previous Paper: Held on 21 Jan 2019 Shift 2
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  1. OTMM (ഒപ്റ്റിക്കൽ ട്രാൻസ്‌സിവർ മോണിറ്ററിംഗ് മൊഡ്യൂൾ)
  2. DTDR (ഡിജിറ്റൽ ടൈം ഡൊമെയ്ൻ റിഫ്ലെക്റ്റോമീറ്റർ)
  3. OTDR (ഒപ്റ്റിക്കൽ ടൈം ഡൊമെയ്ൻ റിഫ്ലെക്റ്റോമീറ്റർ)
  4. OFCM (ഒപ്റ്റിക്കൽ ഫൈബർ കമ്മ്യൂണിക്കേഷൻ മൊഡ്യൂൾ)

Answer (Detailed Solution Below)

Option 3 : OTDR (ഒപ്റ്റിക്കൽ ടൈം ഡൊമെയ്ൻ റിഫ്ലെക്റ്റോമീറ്റർ)
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Detailed Solution

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  • ഫൈബർ ഒപ്റ്റിക് കേബിളുകളുടെ (OFC) സമഗ്രത പരിശോധിക്കുന്നതിന് ഒപ്റ്റിക്കൽ ടൈം ഡൊമെയ്ൻ റിഫ്ലെക്റ്റോമീറ്റർ (OTDR) ഉപയോഗപ്രദമാണ്.
  • ഇതിന് സ്‌പ്ലൈസ് നഷ്ടം പരിശോധിക്കാനും നീളം അളക്കാനും പിഴവുകൾ കണ്ടെത്താനും കഴിയും.
  • പുതിയതായി സ്ഥാപിക്കുമ്പോൾ ഫൈബർ ഒപ്റ്റിക് കേബിളിന്റെ ഒരു "ചിത്രം" സൃഷ്ടിക്കുന്നതിനും OTDR സാധാരണയായി ഉപയോഗിക്കുന്നു.
  • പിന്നീട്, യഥാർത്ഥ  ട്രെയ്‌സും പ്രശ്‌നങ്ങൾ ഉണ്ടായാൽ എടുക്കുന്ന രണ്ടാമത്തെ ട്രെയ്‌സും തമ്മിൽ താരതമ്യം ചെയ്യാം.
  • OTDR-ൽ ഒരു ഉയർന്ന പവർ ലേസർ ട്രാൻസ്മിറ്റർ അടങ്ങിയിരിക്കുന്നു, അത് ഫൈബറിലേക്ക് പ്രകാശത്തിന്റെ പൾസ് അയയ്ക്കുന്നു.
  • പിന്നിലെ വിസരിത പ്രകാശവും പ്രതിഫലിക്കുന്ന പ്രകാശവും ഫൈബറിലൂടെ OTDR-ലേക്ക് മടങ്ങുകയും OTDR മുൻവശത്തെ ഒരു കപ്ലർ വഴി സെൻസിറ്റീവ് റിസീവറിലേക്ക് നയിക്കുകയും ചെയ്യുന്നു.
  • ഓരോ അളവെടുപ്പിനും, OTDR വളരെ ഉയർന്ന പവർ പൾസ് അയയ്‌ക്കുകയും കാലക്രമേണ തിരികെ വരുന്ന പ്രകാശം അളക്കുകയും ചെയ്യുന്നു.
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