Attenuation. Uncabled Fiber Attenuation Cells Point Discontinuity ------------------------------------------------ ------------------------- ---------------------- Attenuation Cells No point of discontinuity greater than 0.10 dB at either 1310 nm (dB/km) or 1550 nm. ------------------------- ---------------------- ------------------------- ---------------------- Wavelength (nm) Standard ------------------------- ---------------------- ------------------------- ---------------------- Less than or equal to 1310 0.40 Attenuation at the Water Peak ------------------------- ---------------------- ------------------------- ---------------------- Less than or equal to 1550 0.30 The attenuation at 1383 plus or minus 3 nm shall not exceed 2.1 dB/km. ------------------------- ---------------------- -------------------------------------------------------------- Attenuation vs. Wavelength -------------------------------------------------------------- --------------------- ------------------- -------------------- Range Ref. lambda Max Increase The attenuation in a given wavelength range does (nm) (nm) alpha (dB/km) not exceed the attenuation of the reference wavelength (lambda) by more than the value alpha. --------------------- ------------------- -------------------- --------------------- ------------------- -------------------- 1285-1330 1310 0.1 --------------------- ------------------- -------------------- --------------------- ------------------- -------------------- 1525-1575 1550 0.05 --------------------- ------------------- -------------------- ----------------------------------------------------------------------------- Attenuation With Bending ----------------------------------------------------------------------------- -------------------- ----------------- ----------------- -------------------- Mandrel Number of Wavelength Induced The induced attenuation due to Diameter Turns (nm) Attenuation fiber wrapped around a mandrel (nm) (dB) of a specified diameter. -------------------- ----------------- ----------------- -------------------- -------------------- ----------------- ----------------- -------------------- Less than or equal to 32 1 1550 0.50 -------------------- ----------------- ----------------- -------------------- -------------------- ----------------- ----------------- -------------------- Less than or equal to 75 100 1310 0.05 -------------------- ----------------- ----------------- -------------------- -------------------- ----------------- ---------------...
Attenuation. Each Optical Wavelength is delivered with appropriate optical characteristics connected to the Customer Premises Equipment. To ensure optimum performance of the link, the optical signal, in both directions, will be attenuated to desired specifications recommended by Rogers’ equipment vendor and Customer’s equipment vendor. Attenuation of the optical signal required at the Customer Premise Equipment beyond the demarcation point will be provided by the Customer.
Attenuation b) Distance Attenuation, Cdist (dB) -15 Cdist = - 20 x log (R / Ro) [2]
Attenuation. The attenuation of the interconnecting cable (including any digital distribution frame or interconnecting equipment) shall not exceed 6 dB at 1024 KHz.
Attenuation. 3. The above tests shall be evaluated for pass or fail results and documented as such on the final test document.
Attenuation. (a) Attenuation at of 1310 nanometer The Average Attenuation Per Kilometre for each Fibre must not exceed 0.4 dB at of 1310 nanometer when the measured length of the Fibre is more than ten (10) kilometres. When the measured length of the Fibre is equal to or less than ten (10) kilometres, the Average Attenuation Per Kilometre must not exceed 0.5 dB at of 1310 nanometer. The attenuation of the Fibre on any given one-kilometre segment taken anywhere over the length of the Fibre must not exceed 0.5 dB at of 1310 nanometer, as indicated in the specifications of the Cable provided by the manufacturer, no matter the length of the Fibre under construction.
Attenuation. The attenuation of any pair shall meet the requirements of Table 6.3. * This term is used per NFPA 259 utilizing the maximum limits for potential heat of 3,500 Btu/lb (8.141 mJ/kg) per NFPA 90A. SPECIFICATION NO. APPROVED DATE PAGE NO. 5 52 The maximum attenuation at elevated temperatures of 40 degree C and 60 degrees C shall be verified using a factor of 0.4% increase per degree C. Attenuation measurements shall be in accordance with ASTM D 4566. Table 6.3 Horizontal UTP Cable ACR (Worst Pair, dB) Freq., MHz Attenuation, Max. NEXT, Min.* ACR* ------------------------------------------------------ 0.772 1.8 70 68 1.00 2.0 68 66 4.00 4.1 59 55 8.00 5.8 54 48 10.00 6.5 53 46 16.00 8.2 50 42 20.00 9.3 48 39 25.00 10.4 47 37 31.25 11.7 45 33 62.50 17.0 41 24 100.00 22.0 38 16 155.00 27.0 37 10 *Rounded to nearest dB.
Attenuation. Maximum value between 1,285 and 1,330 nm. (spectral attenuation curve of a sample of the optical fibre used). - Maximum value of 1,550 nm. - Attenuation uniformity (predetermined premises). Chromatic dispersion: - Between 1,285 and 1,330 nm. (the particular values provided by the manufacturer should be provided). - At 1,550 nm. - Dispersion in polarisation mode.
Attenuation. 1. Toilet room, fire stair, and elevator shaft walls built to structure(deck) above
Attenuation. 2.1.1.1 *** 2.1.1.2 *** 2.1.1.3 *** 2.1.1.4 ***
