VISTEK V1679 single-mode fibre
data transceiver
HU-V1679
25
5.4.2
Optical Output
Parameter
Optical Output (Transmitter)
Connector Type
SC/PC with Shutter, single-mode
Insertion Loss
< 0.3dB (< 0.15dB typ)
Backreflection
better than -45dB
Laser Diode Type
F
abry
P
erot (FP) or
D
istributed
F
eed
B
ack (DFB)
Standard
Laser Wavelengths
1310nm, 1550nm
Note:
The standard 1550nm wavelength is not suitable for CWDM applications!
CWDM
Laser Wavelengths
1470nm, 1490nm, 1510nm, 1530nm
1550nm, 1570nm, 1590nm, 1610nm
Optical Output Power 2 user selectable options:
Medium:
-7dBm (typ)
High:
-3dBm (typ)
Note:
Output Power may vary by ± 1dBm
Extinction Ratio
> 8dB (typ)
Fibre Type
Single-mode (9/125
μ
m)
Transmission Length up to 70 km @ 1550nm (622Mb/s)
(CORNING SMF-28 single-mode fiber)
Table 3 : V1679 Optical Output
5.4.3
Encoding Scheme and Data Rate
The V1679/xx uses an 8b/10b encoding scheme with K28.5 sync characters for proper byte alignment at the
receiving end. The 8b/10b encoding can be found in many of today's high-speed serial transmission
standards, like InfiniBand, FibreChannel, Gigabit Ethernet or DVB-ASI, to name only a few of them.
The serial data rate is 622.08 Mb/s, which makes the V1679/xx, as far as its physical layer is concerned,
compliant with SONET level OC-12.