10
1 MBd Link
(High Performance HFBR-15X2/25X2, Standard HFBR-15X4/25X4)
System Performance
Under recommended operating conditions unless otherwise specified.
Parameter
High
Data Rate
Performance Link Distance
1 MBd
(Standard Cable)
Link Distance
(Improved Cable)
Propagation
Delay
Pulse Width
Distortion t
PLH
-t
PHL
t
PLH
t
PHL
t
D
Symbol Min. Typ. Max. Units
Conditions
dc
1
MBd BER
≤
10
-9
, PRBS:2
7
-1
39
m
I
Fdc
= 60 mA
47
70
m
I
Fdc
= 60 mA, 25°C
45
56
m
m
ns
ns
ns
Ref.
78
180 250
100 140
80
Fig. 14
Notes 1,
3, 4
I
Fdc
= 60 mA
Fig. 15
I
Fdc
= 60 mA, 25°C
Notes 1,
3, 4
R
L
= 560
Ω,
C
L
= 30 pF Fig. 16, 18
I = 0.5 metre
Notes 2, 4
P
R
= -24 dBm
P
R
= -24 dBm
Fig. 16, 17
R
L
= 560
Ω,
C
L
= 30 pF
Note 4
Standard
1 MBd
Parameter
Data Rate
Link Distance
(Standard Cable)
Link Distance
(Improved Cable)
Propagation
Delay
Pulse Width
Distortion t
PLH
-t
PHL
Symbol Min. Typ. Max. Units
Conditions
dc
1
MBd BER
≤
10
-9
, PRBS:2
7
-1
8
m
I
Fdc
= 60 mA
17
43
m
I
Fdc
= 60 mA, 25°C
10
19
t
PLH
t
PHL
t
D
m
m
ns
ns
ns
Ref.
48
180 250
100 140
80
Fig. 12
Notes 1,
3, 4
I
Fdc
= 60 mA
Fig. 13
I
Fdc
= 60 mA, 25°C
Notes 1,
3, 4
R
L
= 560
Ω,
C
L
= 30 pF Fig. 16, 18
I = 0.5 metre
Notes 2, 4
P
R
= -20 dBm
P
R
= -20 dBm
Fig. 16, 17
R
L
= 560
Ω,
C
L
= 30 pF
Note 4
Notes:
1. For I
FPK
> 80 mA, the duty factor must be such as to keep I
Fdc
≤
80 mA. In addition, for I
FPK
> 80 mA, the following rules for
pulse width apply:
I
FPK
≤
160 mA: Pulse width
≤
1 ms
I
FPK
> 160 mA: Pulse width
≤
1
µS,
period
≥
20
µS.
2. The propagation delay for one meter of cable is typically 5 ns.
3. Estimated typical link life expectancy at 40°C exceeds 10 years at 60 mA.
4. Pulsed LED operation at I
FPK
> 80 mA will cause increased link t
PLH
propagation delay time. This extended t
PLH
time contributes
to increased pulse width distortion of the receiver output signal.
HP [ AGILENT(HEWLETT-PACKARD) ]
