HFBR-1115TZ Просмотр технического описания (PDF) - Avago Technologies
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HFBR-1115TZ Datasheet PDF : 12 Pages
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200
180
3.0
1.5
160 2.0
3.5
140 2.5
120 3.0
3.5
tr/f – TRANSMITTER
OUTPUT OPTICAL
RISE/FALL TIMES – ns
100
1280 1300 1320 1340 1360 1380
λC – TRANSMITTER OUTPUT OPTICAL
CENTER WAVELENGTH –nm
HFBR-1115TZ FDDI TRANSMITTER TEST RESULTS
OF λC, ∆λ AND tr/f ARE CORRELATED AND
COMPLY WITH THE ALLOWED SPECTRAL WIDTH
AS A FUNCTION OF CENTER WAVELENGTH FOR
VARIOUS RISE AND FALL TIMES.
1.25
1.025
1.00
0.975
0.90
0.50
4.40
1.975
0.075
10.0
5.6
100% TIME
INTERVAL
40 ± 0.7
± 0.725
± 0.725
4.850
1.525
0.525
0% TIME
INTERVAL
0.10
0.025
0.0
-0.025
-0.05
5.6
10.0
1.525
0.525
4.850
80 ± 500 ppm
TIME – ns
0.075
1.975
4.40
THE HFBR-1115TZ OUTPUT OPTICAL PULSE SHAPE FITS WITHIN THE BOUNDARIES
OF THE PULSE ENVELOPE FOR RISE AND FALL TIME MEASUREMENTS.
Figure 9. HFBR-1115TZ transmitter output optical spectral width (FWHM) vs. Figure 10. Output optical pulse envelope.
transmitter output optical center wavelength and rise/fall times.
5
4
3
2.5 x 10-10 BER
2
1.0 x 10-12 BER
1
0
-4 -3 -2 -1 0 1 2 3 4
EYE SAMPLING TIME POSITION (ns)
CONDITIONS:
1.TA = 25° C
2. VCC = 5 Vdc
3. INPUT OPTICAL RISE/FALL TIMES = 1.0/2.1 ns.
4. INPUT OPTICAL POWER IS NORMALIZED TO
CENTER OF DATA SYMBOL.
5. NOTE 21 AND 22 APPLY.
Figure 11. HFBR-2115TZ receiver relative input optical power vs.
eye sampling time position.
-31.0 dBm
PA (PO + 1.5 dB
< PA < -31.0 dBm)
-45.0 dBm
INPUT OPTICAL POWER
(> 1.5 dB STEP INCREASE)
SIGNAL – DETECT (ON)
SIGNAL – DETECT (OFF)
AS – MAX
MIN (PO + 4.0 dB OR -31.0 dBm)
PO = MAX (PS OR -45.0 dBm)
(PS = INPUT POWER FOR BER < 102)
INPUT OPTICAL POWER
(> 4.0 dB STEP DECREASE)
ANS – MAX
TIME
AS – MAX — MAXIMUM ACQUISITION TIME (SIGNAL).
AS – MAX IS THE MAXIMUM SIGNAL – DETECT ASSERTION TIME FOR THE STATION.
AS – MAX SHALL NOT EXCEED 100.0 µs. THE DEFAULT VALUE OF AS – MAX IS 100.0 µs.
ANS – MAX — MAXIMUM ACQUISITION TIME (NO SIGNAL).
ANS – MAX IS THE MAXIMUM SIGNAL – DETECT DEASSERTION TIME FOR THE STATION.
ANS – MAX SHALL NOT EXCEED 350 µs. THE DEFAULT VALUE OF AS – MAX IS 350 µs.
Figure 12. Signal detect thresholds and timing.
7
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