5
O
4.0
14
0
0.15
FIBER OPTIC CABLE LENGTH (km)
0.5
1.5 2.0
2.5
12
10
8
6
4
3.5
2
1.0
3.0
HFBR-5106, 62.5/125 μm
HFBR-5106,
50/125 μm
HFBR-5107,
50/125 μm
HFBR-5107,
62.5/125 μm
Figure 4. Optical Power Budget at
BOL vs. Fiber Optic Cable Length.
associated with these
technologies in the industry. The
Industry convention is 3 dB aging
for 800 nm and 1.5 dB for 1300
nm LEDs. The Agilent LEDs will
normally experience less than
1 dB of aging over normal com-
mercial equipment mission life
periods. Contact your Agilent
sales representatives for
additional details.
Figure 4 was generated with an
Agilent fiber optic link module
containing the current industry
conventions for fiber cable
specifications and the 100VG-
AnyLAN Optical Parameters.
These parameters are reflected in
the guaranteed performance of
the transceiver specifications in
this data sheet. This same model
has been used extensively in the
ANSI X3T and IEEE committees,
including the ANSI X3T12
committee, to establish the
optical performance requirements
for various fiber optic interface
standards. The cable parameters
used come from the ISO/IEC
JTCI/SC 25/WG3 Generic Cabling
for Customer Premises per DIS
11801 document and the EIA/
TIA568-A Commercial Building
Telecommunications Cabling
Standard per SP-2840.
Transceiver Signaling
Operating Rate Range
and BER Performance
For purposes of definition, the
symbol (Baud) rate, also called
signaling rate, is the reciprocal of
the shortest symbol time. Data
rate (bits/sec) is the symbol rate
divided by the encoding factor
used to encode the data
(symbols/bit).
When used in 100VG AnyLAN
100 Mbps applications, the
performance of the 1300 nm
transceiver is guaranteed over the
signaling rate of 10 MBd to
120 MBd to the full conditions
listed in the individual product
specification tables.
The transceivers may be used for
other applications at signaling
rates outside of the 10 MBd to
120 MBd range with some
penalty in the link optical power
budget primarily caused by a
reduction of receiver sensitivity.
Figure 5 gives an indication of
the typical performance of these
1300 nm products at different
rates.
These transceivers can also be
used for applications which
require different Bit Error Rate
(BER) performance. Figure 6
illustrates the typical trade-off
between link BER and the
receivers input optical power
level.
Table 1 lists the hub control
signals defined in IEEE 802.12,
section 18.5.4.1. These signal
rates are below 10 MBd but they
are transported with adequate
accuracy for hub access control.
Transceiver Jitter
Performance
The Agilent 1300 nm transceivers
are designed to operate per the
system interface jitter
specifications listed in Table 27
of section 18.9. of the IEEE
802.12 (100VG-AnyLAN
standards).
Figure 5. Transceiver Relative Optical
Power Budget at Constant BER vs.
Signaling Rate.
Figure 6. Bit Error Rate vs. Relative
Receiver Input Optical Power.
T
A
0
200
3.0
0
SIGNAL RATE (MBd)
25
75
100 125
2.5
2.0
1.5
1.0
175
0.5
50
150
CONDITIONS:
1. PRBS 2
7
-1
2. DATA SAMPLED AT CENTER OF
DATA SYMBOL.
3. BER = 10
-6
4. T
A
= 25° C
5. V
= 5 V
6. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
B
-6
4
1 x 10
-2
RELATIVE INPUT OPTICAL POWER – dB
-4
2
-2
0
1 x 10
-4
1 x 10
-6
1 x 10
-7
1 x 10
-8
2.5 x 10
-10
1 x 10
-11
1 x 10
-12
HFBR-510X
CONDITIONS:
1. 125 MBd
2. PRBS 2
7
-1
3. CENTER OF SYMBOL SAMPLING.
4. T
A
= 25° C
5. V
= 5 V
6. INPUT OPTICAL RISE/FALL TIMES
= 1.0/2.1 ns.
CENTER OF SYMBOL
1 x 10
-5
1 x 10
-3