User's Manual

XGS-PON FGW User Manual
32
General Specifications
Q_PPS_DM_018_V1.3
Items
Unit
Operating wavelength band
nm
1260-1280
Line code
--
Scrambled NRZ
Maximum reflectance of equipment measured at
transmitter wavelength
dB
–10
Minimum ORL of ODN (Note 1)
dB
More than 32
ODN Class
N1
N2
E1
Mean launch power minimum
(Note 2)
dBm
+4.0
+4.0
+4.0
Mean launch power maximum
dBm
+9.0
+9.0
+9.0
Maximum transmitter enable transient time (Note 3)
bits (nsec)
1 280
(~128.6)
Maximum transmitter disable transient time (Note 3)
bits (nsec)
1 280
(~128.6)
Minimum extinction ratio (Note 2)
dB
6.0
Tolerance to reflected optical power (Note 4)
dB
More than -15
Dispersion Range
ps/nm
0 to –140
Minimum side mode suppression ratio
dB
30
Launched optical power without input to the transmitter
(Note 3)
dBm
–45
Fiber Gateway Rx
Nominal line rate
Gbps
9.95328
Receiving wavelength
nm
1575 - 1580
Maximum optical path penalty (Note 5)
dB
1.0
Maximum reflectance of equipment at R/S, measured at
receiver wavelength
dB
Less than -20
Bit error ratio reference level
–
10-3 (Note 4)
ODN Class
N1
N2
E1
Minimum sensitivity at BER reference level (Note 6)
dBm
–28.0
–28.0
–28.0
Minimum overload at BER reference level
dBm
–9.0
–9.0
–9.0
Consecutive identical digit immunity
bit
More than 72
Receiver tolerance to reflected optical power (Note 7)
dB
Less than 10
NOTES:
NOTE 1 – There are optional cases where the "minimum ORL of ODN can be as low as 20 dB. (see Appendix I
of ITU-T G.983.1).
NOTE 2 – The minimum average launch power and the minimum ER are consistent with a minimum OMA of
4.78 dBm. (See Appendix I of G.9807.1 for details).
NOTE 3– As defined in clause B.9.2.7.3.1 of of G.9807.1. The values in nanoseconds are informative.
NOTE 4 – Parameter known in [ITU-T G.984.2] as "Tolerance to the transmitter incident light power".
NOTE 5 – If a transmitter exhibits a higher penalty that specified, it can still comply if it equally increases the
minimum launch power to compensate for extra optical path penalty (OPP), while remaining under the maximum
launch power. In no case should the OPP exceed 2 dB.
NOTE 6 – This sensitivity shall be met in the presence of G-PON and video overlay on the same ODN. If either
G-PON, or video overlay or both of them are absent, the sensitivity may be different (precise value is for further
study).
NOTE 7 – Parameter known in [ITU-T G.984.2] as "Tolerance to the reflected optical power"