HFBR-2115T Ver la hoja de datos (PDF) - HP => Agilent Technologies
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HFBR-2115T Datasheet PDF : 12 Pages
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cable specifications and the FDDI
PMD optical parameters. These
parameters are reflected in the
guaranteed performance of the
transmitter and receiver specifica-
tions in this data sheet. This same
model has been used extensively in
the ANSI and IEEE committees,
including the ANSI X3T9.5
committee, to establish the optical
performance requirements for
various fiber-optic interface
standards. The cable parameters
used come from the ISO/IEC JTC1/
SC 25/WG3 Generic Cabling for
Customer Premises per DIS 11801
document and the EIA/TIA-568-A
Commercial Building Telecom-
munications Cabling Standard per
SP-2840.
Transmitter and Receiver
Signaling Rate Range and
BER Performance
For purposes of definition, the
symbol rate (Baud), also called
signaling rate, is the reciprocal of
the 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, ATM 100
Mbps, and Fast Ethernet
applications, the performance of
Hewlett-Packard’s 1300 nm HFBR-
1115/-2115 data link modules is
guaranteed over the signaling rate
of 10 MBd to 125 MBd to the full
conditions listed in the individual
product specification tables.
The data link modules can 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.
180
Data Link Jitter
3.0
Performance
2.5
The Hewlett-Packard 1300 nm data
link modules are designed to
2.0
operate per the system jitter
1.5
allocations stated in Table E1 of
Annex E of the FDDI PMD
1.0
standard.
0.5
0
0 25 50 75 100 125 150 175 200
SIGNAL RATE (MBd)
CONDITIONS:
1. PRBS 27-1
2. DATA SAMPLED AT CENTER OF DATA SYMBOL.
3. BER = 10-6
4. TA = 25° C
5. VCC = 5 Vdc
6. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
Figure 5. Transmitter/Receiver
Relative Optical Power Budget at
Constant BER vs. Signaling Rate.
These data link modules can also
be used for applications which
require different bit-error-ratio
(BER) performance. Figure 6
illustrates the typical trade-off
between link BER and the receiver
input optical power level.
1 x 10-2
1 x 10-3
1 x 10-4
CENTER OF
SYMBOL
1 x 10-5
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
-6 -4
-2
0
2
4
RELATIVE INPUT OPTICAL POWER – dB
CONDITIONS:
1. 125 MBd
2. PRBS 27-1
3. TA = 25° C
4. VCC = 5 Vdc
5. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
Figure 6. Bit-Error-Ratio vs. Relative
Receiver Input Optical Power.
The 1300 nm transmitter will
tolerate the worst-case input
electrical jitter allowed in the table
without violating the worst-case
output jitter requirements of
Section 8.1 Active Output Interface
of the FDDI PMD standard.
The 1300 nm receiver will tolerate
the worst-case input optical jitter
allowed in Section 8.2 Active Input
Interface of the FDDI PMD
standard without violating the
worst-case output electrical jitter
allowed in the Table E1 of the
Annex E.
The jitter specifications stated in
the following transmitter and
receiver specification table are
derived from the values in Table
E1 of Annex E. They represent the
worst-case jitter contribution that
the transmitter and receiver are
allowed to make to the overall
system jitter without violating the
Annex E allocation example. In
practice, the typical jitter
contribution of the Hewlett-
Packard data link modules is well
below the maximum amounts.
Recommended Handling
Precautions
It is advised that normal static
precautions be taken in the
handling and assembly of these
data link modules to prevent
damage which may be induced by
electrostatic discharge (ESD). The
HFBR-1115/-2115 series meets
MIL-STD-883C Method 3015.4
Class 2.
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