ment and the EIA/TIA-568-A
Commercial Building Telecom-
munications Cabling Standard per
SP-2840.
The HFBR-5104 series 800 nm
transceiver curve in Figure 4 was
generated based on extensive
empirical test data of typical 800
nm transmitter and receiver
performance. The curve includes
the effect of typical fiber attenua-
tion, plus receiver sensitivity loss
due to chromatic and metal
dispersion losses through the
fiber.
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 FDDI and ATM 100
Mbps applications the
performance of the 1300 nm
transceivers is guaranteed over
the signaling rate of 10 MBd to
125 MBd to the full conditions
listed in individual product
specification tables.
The transceivers may be used for
other applications at signaling
rates outside of the 10 MBd to
125 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.
Transceiver Jitter
Performance
The Hewlett-Packard 1300 nm
transceivers are designed to
operate per the system jitter
allocations stated in Tables E1 of
Annexes E of the FDDI PMD and
LCF-PMD standards.
The HP 1300 nm transmitters will
tolerate the worst case input
electrical jitter allowed in these
tables without violating the worst
case output jitter requirements of
Sections 8.1 Active Output
Interface of the FDDI PMD and
LCF-PMD standards.
The HP 1300 nm receivers will
tolerate the worst case input
optical jitter allowed in Sections
8.2 Active Input Interface of the
TRANSCEIVER RELATIVE OPTICAL POWER BUDGET
AT CONSTANT BER (dB)
3.0
1 x 10
-2
2.5
1 x 10
-3
2.0
BIT ERROR RATE
1 x 10
-4
1 x 10
-5
1 x 10
-6
1 x 10
-7
1 x 10
-8
1 x 10
-11
1 x 10
-12
HFBR-5103/-5104/-5105
SERIES
CENTER OF SYMBOL
1.5
1.0
0.5
2.5 x 10
-10
0
0
25
50
75
100
125
150
175 200
SIGNAL RATE (MBd)
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
CC
= 5 V
dc
6. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
-6
-4
-2
0
2
4
RELATIVE INPUT OPTICAL POWER – dB
CONDITIONS:
1. 125 MBd
2. PRBS 2
7
-1
3. CENTER OF SYMBOL SAMPLING.
4. T
A
= 25° C
5. V
CC
= 5 V
dc
6. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
Figure 5. Transceiver Relative Optical Power Budget
at Constant BER vs. Signaling Rate.
Figure 6. Bit Error Rate vs. Relative Receiver Input
Optical Power.
131
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
