HFBR-5103 查看數據表（PDF） - HP => Agilent Technologies

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HFBR-5103

FDDI, 100 Mbps ATM, and Fast Ethernet Transceivers in Low Cost 1x9 Package Style

HP => Agilent Technologies 

IDLE Line State pattern, 125

MBd (62.5 MHz square-wave),

input signal to simulate any

cross-talk present between the

transmitter and receiver sections

of the transceiver.

20a. All the conditions of Note 20 apply

except that the BER requirement is

tightened to 1 x 10-12 and the

minimum window time-width test

condition is narrowed from 4.6 ns to

3.7 ns to reflect the lesser amount of

worst case input optical jitter as a

result of shorter optical cable

lengths and lower BER which are

both attributes of the FDDI LCF-

PMD.

20b. All the conditions of Note 20 apply

except that the BER requirement is

tightened to 1 x 10-12 and the

minimum window time-width test

condition is adjusted to 4.2 ns to

reflect the HFBR-5104 transmitter

contributed jitter values per the

specification table.

21. All conditions of Note 20 apply

except that the measurement is

made at the center of the symbol

with no window time-width.

21a. All the conditions of Note 21 apply

accept that the BER requirement is

tightened to 1 x 10-12.

22. This value is measured during the

transition from low to high levels of

input optical power.

23. The Signal Detect output shall be

asserted within 100 µs after a step

increase of the Input Optical Power.

The step will be from a low Input

Optical Power, ≤ -45 dBm, into the

range between greater than PA, and

-14 dBm. The BER of the receiver

output will be 10-2 or better during

the time, LS_Max (15 µs) after

Signal Detect has been asserted. See

Figure 12 for more information.

23a. The Signal Detect output shall be

asserted within 100 µs after a step

increase of the Input Optical Power.

The step will be from a low Input

Optical Power, ≤ -45 dBm, into the

range -27 dBm ± 2 dB. The BER of

the receiver output will be 10-2 or

better during the time, LS_Max

(15 µs) after Signal Detect has been

asserted.

24. This value is measured during the

transition from high to low levels of

input optical power. The maximum

value will occur when the input

optical power is either -45 dBm

average or when the input optical

power yields a BER of 10-2 or better,

whichever power is higher.

25. Signal detect output shall be de-

asserted within 350 µs after a step

decrease in the Input Optical Power

from a level which is the lower of;

-31 dBm or PD + 4 dB (PD is the

power level at which signal detect

was deasserted), to a power level of

-45 dBm or less. This step decrease

will have occurred in less than 8 ns.

The receiver output will have a BER

of 10-2 or better for a period of 12 µs

or until signal detect is deasserted.

The input data stream is the Quiet

Line State. Also, signal detect will

be deasserted within a maximum of

350 µs after the BER of the receiver

output degrades above 10-2 for an

input optical data stream that

decays with a negative ramp func-

tion instead of a step function. See

Figure 12 for more information.

25a. Signal detect output shall be de-

asserted within 350 µs after a step

decrease in the Input Optical Power.

The step decrease signal shall have

an on level of -27 dBm ± 2 dB and

an off power level of -45 dBm or less.

This step decrease will have

occurred in less than 8 ns. The

receiver outputs within 12 µs after

the step decrease in the optical

power will not reproduce with an

accuracy greater than 90% any

spurious signals (e.g. symbols from

adjacent physical link components

or power supply ripple). The input

data stream is the Quiet Line State.

Signal detect will also be deasserted

within a maximum of 350 µs after

the BER of the receiver output

degrades above 10-2 for an input

optical data stream that decays with

a negative ramp function with a

response time > 8 ns.

26. Systematic Jitter (SJ) contributed

by the 800 nm transmitter is a com-

bination of Duty Cycle Distortion

(DCD) and Data Dependent Jitter

(DDJ).

27. Random Jitter contributed by the

800 nm transmitter is specified with

an IDLE Line State, 125 MBd (62.5

MHz square-wave), input signal.

147

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