參數(shù)資料
型號： HFBR-5320
英文描述： 200 MBd Low-Cost SBCON Multimode Fiber Transceiver(200 MBd 低價(jià)格SBCON 多模式光纖收發(fā)器)
中文描述： 200 MBd的低成本SBCON多模光纖收發(fā)器（200 MBd的低價(jià)格SBCON多模式光纖收發(fā)器）
文件頁數(shù)： 6/8頁
文件大?。?/td> 162K
代理商： HFBR-5320
6
Notes:
1. This is the maximum voltage that can
be applied across the Differential
Transmitter Data Inputs to prevent
damage to the input ESD protection
circuit.
2. The outputs are terminated with 50
connected to V
CC
–2 V.
3. The power supply current needed to
operate the transmitter is provided to
differential ECL circuitry. This
circuitry maintains a nearly constant
current flow from the power supply.
Constant current operation helps to
prevent unwanted electrical noise
from being generated and conducted
or emitted to neighboring circuitry.
4. This value is measured with the
outputs terminated into 50
connected to V
CC
–2 V and an Input
Optical Power Level of –14.5 dBm
average.
5. The power dissipation value is the
power dissipated in the receiver itself.
Power dissipation is calculated as the
sum of the products of supply voltage
and currents, minus the sum of the
products of the output voltages and
currents.
6. This value is measured with respect to
V
CC
with the output terminated into
50
connected to V
CC
–2 V.
7. The output rise time and fall times are
measured between 20% and 80%
levels with the output connected to
V
CC
–2 V through 50
.
8. Eye-width specified defines the
minimum clock time-position range,
centered around the center of the 5 ns
baud interval, at which the BER must
be 10
–12
or better. Test data pattern
is PRBS 2
7
–1. The maximum change
in input optical power to open the eye
to 1.4 nsec from a closed eye is 1.0
dB.
9. These optical power values are
measured with the following
conditions:
The Beginning of Life (BOL) to the
End of Life (EOL) optical power
degradation is assumed to be 1.5
dB per the industry convention for
long wavelength LEDs. The actual
degradation observed in normal
commercial environments will be
<1.0 dB with Agilent’s 1300 nm
LED products.
Over the specified operating
voltage and temperature ranges.
Input Signal: 2
7
–1 data pattern
PseudoRandom Bit-Stream, 200
Mbit/sec NRZ code.
10. Input conditions: 100 MHz, square
wave signal, input voltages are in the
range specified for V
IL
and V
IH
.
11. From an assumed Gaussian-shaped
wavelength distribution, the
relationship between FWHM and
RMS values for Spectral Width is
2.35 x RMS = FWHM.
12. Measured with electrical input signal
rise and fall time of 0.35 to 1.3 ns
(20-80%) at the transmitter input
pins. Optical output rise and fall
times are measured between 10% and
90% levels.
13. Transmitter Systematic Jitter is equal
to the sum of Duty Cycle Distortion
(DCD) and Data Dependent Jitter
(DDJ). DCD is equivalent to Pulse-
Width Distortion (PWD). Systematic
Jitter is measured at the 50% signal
level with 200 MBd, PRBS 2
7
–1
electrical input data pattern.
14. This specification is intended to
indicate the performance of the
receiver section of the transceiver
when Input Optical Power signal
characteristics are present per the
following conditions. The Input
Optical Power dynamic range from
the minimum level (with a window
time-width) to the maximum level is
the range over which the receiver is
guaranteed to provide output data
with a Bit Error Ratio (BER) better
than or equal to 10
–15
.
At the Beginning of Life (BOL).
Over the specified operating
temperature and voltage ranges.
Receiver data window time-width is
1.4 ns or greater and centered at
mid-symbol.
Input signal is 200 MBd,
PseudoRandom-Bit-Stream 2
7
–1
data pattern.
Transmitter cross-talk effects have
been included in Receiver
sensitivity. Transmitter should be
running at 50% duty cycle
(nominal) between 8 - 200 Mbps,
while Receiver sensitivity is
measured.
15. All conditions of note 14 apply
except that the measurement is made
at the center of the symbol with no
window time-width.
16. The receiver systematic jitter
specification applies to optical
powers between –14.5 dBm avg. to
–27.0 dBm avg. at the receiver.
Receiver Systematic Jitter is equal to
the sum of Duty Cycle Distortion
(DCD) and Data Dependent Jitter
(DDJ). DCD is equivalent to Pulse-
Width Distortion (PWD). Systematic
Jitter is measured at the 50% signal
level with 200 MBd, PRBS 2
7
–1
electrical output data pattern.
17. Status Flag switching thresholds:
Direction of decreasing optical power
If Power >–36.0 dBm avg., then SF
= 1 (high)
If Power <–45.0 dBm avg., then SF
= 0 (low)
Direction of increasing optical power:
If Power <–45.5 dBm avg., then SF
= 0 (low)
If Power >–35.5 dBm avg., then SF
= 1 (high)
18. Status Flag Hysteresis is the
difference in low-to-high and high-to-
low switching thresholds. Thresholds
must lie within optical power limits
specified. The Hysteresis is desired to
avoid Status Flag chatter when the
optical input is near the threshold.
19. The Status Flag output shall be
asserted with 500
μ
s after a step
increase of the Input Optical Power.
The step will be from a low Input
Optical Power <–45.5 dBm avg., to
>–35.5 dBm avg.
20. Status Flag output shall be de-
asserted within 500
μ
s after a step
decrease in the Input Optical Power.
The Step will be from a high Input
Optical Power >–36.0 dBm avg. to
<–45.0 dBm avg.
21. This value is measured with an output
load of R
L
= 10 k
.
22. The Extinction Ratio is a measure of
the modulation depth of the optical
signal. The data “0” output optical
power is compared to the data “1”
peak output optical and expressed in
decibels. With the transmitter driven
by a HALT Line State (12.5 Mhz
square-wave) signal, the average
optical power is measured. The data
“1” peak power is then calculated by
adding 3 dB to the measured average
optical power. The data “0” output
optical power is found by measuring
the optical power when the
transmitter is driven by a logic “0”
input. The Extinction Ratio is the
ratio of the optical power at the “0”
level compared to the optical power
at the “1” level expressed in decibels.
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