6
Optical Power Budget and
Link Penalties
The worst-case Optical Power Budget (OPB) in dB for a ber
optic link is determined by the dierence between the
minimum transmitter output optical power (dBm avg) and
the lowest receiver sensitivity (dBm avg). This OPB provides
the necessary optical signal range to establish a working
ber-optic link. The OPB is allocated for the ber-optic cable
length and the corre sponding link penalties. For proper link
perform ance, all penalties that aect the link performance
must be acc ounted for within the link optical power bud-
get. The Gigabit/sec Ethernet (GbE) IEEE 802.3z standard
identies, and has modeled, the contributions of these
OPB penalties to establish the link length requirements for
62.5/125 µm and 50/125 µm multi mode ber usage. In addi-
tion, single-mode ber with standard 1300 nm Fabry Perot
lasers have been modeled and specied. Refer to IEEE 802.3z
standard and its supplemental documents that develop the
model, empirical results and nal specications.
10 km Link Support
As well as complying with the LX 5 km standard, the AFCT-
56xxZ specication provides additional margin allowing
for a 10 km Gigabit Ethernet link on single mode ber.
This is accomplished by limiting the spectral width and
center wavelength range of the transmitter while increas-
ing the output optical power and improving sensitivity.
All other LX cable plant recommendations should be
followed.
CAUTION:
There are no user serviceable parts nor any maintenance
required for the AFBR-56xxZ and AFCT-56xxZ product
family. All adjustments are made at the factory before
shipment to our customers. Tampering with or modify-
ing the performance of any Avago Technologies GBIC
unit will result in voided product warranty. It may also
result in improper operation of the circuitry, and possible
overstress of the semiconductor components. Device
degradation or product failure may result.
Connection of either the AFBR-5601Z or the AFCT-5611Z
to a non-approved optical source, operating above the
recommended absolute maximum conditions, or op-
erating in a manner inconsistent with unit design and
function, may result in hazardous radiation exposure and
may be considered an act of modifying or manufacturing
a laser product. The person(s) performing such an act is
required by law to recertify the laser product under the
provisions of US 21 CFR (Subchapter J).
Regulatory Compliance
Feature Test Method Targeted Performance
Electrostatic Discharge
(ESD) to the Electrical Pins
MIL-STD-883C
Method 3015.7
Class 1 (>2000 V)
Electrostatic Discharge
(ESD) to the Duplex SC
Receptacle
Variation of IEC 61000-4-2 Typically withstand at least 15 kV without damage
when port is contacted by a Human Body Model probe.
Electromagnetic
Interference (EMI)
FCC Class B
CENELEC EN55022 Class B
(CISPR 22A)
VCCI Class 1
Margins are dependent on customer board and chassis
design.
Immunity Variation of IEC 61000-4-3 Typically show no measurable eect from a10 V/m eld
swept from 27 to 1000 MHz applied to the transceiver
without a chassis enclosure
Laser Eye Safety US 21 CFR, Subchapter J perparagraphs
1002.10 and 1002.12
EN 60825-1: 1994+A11
EN 60825-2: 1994+A1
EN 60950: 1992+A1+A2+A3+A4+A11
AEL Class I, FDA/CDRH
AFBR-5601Z Accession No. 9720151-51
AFCT-5611Z Accession No. 9521220-120AEL Class 1,
TUV Rheinland of North America
AFBR-5601Z Certicate No. R72040311.004
AFCT-5611Z Certicate No. 933/21201880/04
Protection Class III
Component
Recognition
Underwriters Laboratories and Canadian
Standards Association Joint Component
Recognition for Information Technology
Equipment Including Electrical Business
Equipment.
UL File E173874
RoHS Compliance Compliant to EU Directive 2002/95/EC.
