8
The transceivers may be used for
other applications at signaling
rates different than 155 Mbps
with some variation in the link
optical power budget. Figure 5
gives an indication of the typical
performance of these products at
different rates.
Table B1 of Annex B of the draft
ANSI T1E1.2 Revision 3 standard.
without violating the Annex B
allocation example. In practice,
the typical contribution of the
Agilent transceivers is well below
these maximum allowed amounts.
The Agilent 1300 nm transmitters
will tolerate the worst case input
electrical jitter allowed in Annex
B without violating the worst case
output optical jitter requirements.
Recommended Handling
Precautions
Agilent recommends that normal
static precautions be taken in the
handling and assembly of these
transceivers to prevent damage
which may be induced by
electrostatic discharge (ESD).
The HFBR-5200 series of
transceivers meet MIL-STD-883C
Method 3015.4 Class 2 products.
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.
The Agilent 1300 nm receivers
will tolerate the worst case input
optical jitter allowed in Annex B
without violating the worst case
output electrical jitter allowed.
The jitter specifications stated in
the following 1300 nm transceiver
specification tables are derived
from the values in Table B1 of
Annex B. They represent the
worst case jitter contribution that
the transceivers are allowed to
make to the overall system jitter
Care should be used to avoid
shorting the receiver data or
signal detect outputs directly to
ground without proper current
limiting impedance.
Transceiver Jitter
Performance
The Agilent 1300 nm transceivers
are designed to operate per the
system jitter allocations stated in
2.5
-2
1 x 10
2.0
1.5
1.0
-3
1 x 10
-4
1 x 10
HFBR-5204/5205
SERIES
-5
-6
1 x 10
1 x 10
CENTER OF SYMBOL
0.5
0
-7
-8
-9
-10
-11
-12
1 x 10
1 x 10
1 x 10
1 x 10
1 x 10
1 x 10
0.5
0
25
50
75 100 125 150 175 200
SIGNAL RATE (MBd)
-6
-4
-2
0
2
4
RELATIVE INPUT OPTICAL POWER – dB
CONDITIONS:
1. PRBS 2 -1
CONDITIONS:
1. 155 MBd
2. PRBS 2 -1
7
2. DATA SAMPLED AT CENTER OF DATA SYMBOL.
7
-6
3. BER = 10
3. CENTER OF SYMBOL SAMPLING.
4. T = 25° C
A
4. T = 25° C
A
5. V
= 5 V
CC
dc
5. V
= 5 V
CC
6. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
dc
6. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
Figure 6. Bit Error Rate vs. Relative Receiver Input
Optical Power.
Figure 5. Transceiver Relative Optical Power Budget
at Constant BER vs. Signaling Rate.