VISTEK V1679 single-mode fibre
data transceiver
24
Issue 1
The 9-pin DSUB connectors for COM1 and COM2 are clearly marked on the adapter. Note that only COM1
can be configured to function as a fully featured Modem port. For this purpose, a little slide switch is used to
connect the extra lines, 'borrowed' from COM2, to the COM1 connector. If COM2 is used as a RS-422
interface, make sure that the switch is set to TxD/RxD only in order to avoid having COM2 signal lines routed
to the COM1 connector. Although not used for COM1 in this mode, those lines would act as long stubs and
would have a bad effect on signal integrity.
5.3.2
GPIO Terminals
The GPIO Terminals are grouped in two blocks (Group A, Group B); each GPIO signal comes as a pair (+/-).
The conductor size may vary between 0.14 – 0.5 mm
2
(AWG 26-20). The recommended stripping length is
11mm.
5.3.3
Power Supply Output
The V1679 Breakout Adapter features a power supply output, which delivers unreg15V @ 1A (fused)
on a 3-way PHOENIX Header with 3.5mm pitch (MCV1.5/3-G-3.5).
5.4
Optical Interfaces
The maximum optical input power must not exceed 5mW (average) or 10mW (peak) at wavelengths
1110nm
≥
λ
≤
1650nm. Exceeding these limits may result in a permanent damage of the optical receiver
unit.
If the baseboard needs to be removed from the rack, never touch the fiber end face of the connectors!
Use plastic dust caps to protect the ferrules of boards not in use. See Chapter 9 ‘Cleaning Instructions’
for further information.
5.4.1
Optical Input
Parameter
V1679 Optical Input (Receiver)
Connector Type
SC/PC with Shutter, single-mode
Insertion Loss
< 0.3dB (< 0.15dB typ)
Backreflection
better than -45dB
Photodiode Type
InGaAs PIN-Photodiode
Detection Range
1100nm – 1650nm
Saturation Power
>-3dBm (0.5mW), (typ)
Sensitivity
-3dBm to -28dBm (typ)
Bit Error Rate (BER)
<10
-12
Fibre type
Single-mode (9/125
μ
m)
Table 2 : V1679 Optical Input
CAUTION
ATTENTION