ANSI INCITS 543-2019 pdf free download – Fibre Channel – Physical Interface-7 (FC-PI-7).
3 Definitions and conventions
For the purposes of this standard, the following definitions, conventions, abbreviations, acronyms,and symbols apply.
3.1Definitions
3.1.1 T, aR: alpha T, alpha R; reference points used for establishing signal budgets at the chip
contacts of the transmitter and receiver in an FC device or retiming element.
3.1.2 YT, ‘R: gamma T, gamma R; interoperability points used for establishing signal budgets.
Gamma T is the optical transmitter interface compliant point defined as the output of a 0.5 mto 2 m patchcord connected to the external enclosure connector.
3.1.3 87, 6R: delta T, delta R; interoperability points used for establishing signal budget at the
internal connector of a removable PMD element.
3.1.4alpha T, alpha R: See aT,aR (3.1.1).
3.1.5 attenuation:The transmission medium power or amplitude loss expressed in units of dB.3.1.6average power:The optical power measured using an average-reading power meter when transmitting valid transmission characters.
3.1.7 bandwidth: The difference between the upper -3 dB frequency and the lower-3 dB frequency of the amplitude response of a Fibre Channel component.
3.1.8 baud:A unit of signaling speed, expressed as the maximum number of times per second the
signal may change the state of the transmission line or other medium.(Units of baud aresymbolslsec.)
3.1.9 bit error ratio(BER): The probability of a correct transmitted bit being erroneously received
in a communication system.For purposes of this standard,BER is the number of bits outputfrom a receiver that differ from the correct transmitted bits, divided by the number of
transmitted bits.
3.1.10 bit synchronization: The condition that a receiver is delivering retimed serial data at the required BER.
3.1.11 byte:An eight-bit entity prior to encoding, or after decoding, with its least significant bit denoted as bit 0 and most significant bit as bit 7.The most significant bit is shown on the leftside unless specifically indicated otherwise.
3.1.12 cable plant: All passive communications elements (e.g., optical fiber, cable, connectors,splices, etc.) between a transmitter and a receiver.
3.1.13 center wavelength (laser): The value of the central wavelength of the operating, modulated laser.This is the wavelength where the effective optical power resides.See lEC 61280-1-3(reference [8]).
3.1.14character: A defined set of n contiguous bits where n is determined by the encoding
scheme.
3.1.15 component: Entities that make up the link.Examples are connectors, cable assemblies,
transceivers, port bypass circuits, and hubs.
3.1.16 connector: Electro-mechanical or opto-mechanical components consisting of a receptacle
and a plug that provide a separable interface between two transmission media segments.Connectors may introduce physical disturbances to the transmission path due to impedancemismatch, crosstalk, and the like.These disturbances may introduce jitter under certain conditions.
3.1.17delta T, delta R: See 8T, 8R (3.1.3).3.1.18 device: See FC device.
3.1.19 dispersion: A term in this document used to denote pulse broadening and distortion from all optical causes.The causes of dispersion in optical transmissions are modal, chromatic andpolarization mode dispersion.Modal dispersion is caused by the difference in the propagation velocity of the guided modes in a multimode fiber. Chromatic dispersion, due tothe difference in propagation of the various spectral components, of the signal and opticalsource.Polarization mode dispersion is caused by fiber defects, that makes the propagationvelocity dependent of the light polarization state.
3.1.20external connector: A bulkhead connector, whose purpose is to carry the FC signals into and out of an enclosure, that exits the enclosure with only minor compromise to the shieldeffectiveness of the enclosure.
3.1.21 extinction ratio outer: The ratio of the highest optical power to the lowest optical power inthe presence of a PAM4 signal (i.e., levels 3 and 0 in Figure 4(B), clause 5).See IEEE 802.3TM-2018,(reference [16]), clause 121.8.6.ANSI INCITS 543 pdf download.