Arcadian Networks Inc. V390I Manual De Usuario
2 Physical and Functional Description
12
V290iA User Guide
The Ethernet and Serial interfaces use a rugged design to protect the interface pins.
The interface panel is located on the bottom of the V390i when it is mounted in the
standard way, and the WiFi antenna connections are on the top.
The interface panel is located on the bottom of the V390i when it is mounted in the
standard way, and the WiFi antenna connections are on the top.
Heating and Cooling
In order to maintain the proper working temperature, the V390i has a temperature
control system included inside the housing. This temperature control system allows the
V390i to maintain an ambient temperature range of between -30° C and 60° C.
control system included inside the housing. This temperature control system allows the
V390i to maintain an ambient temperature range of between -30° C and 60° C.
Power
The V390i supports an input voltage of 38-72 VDC, optimized for 48 VDC, with 5A input
current protection. The V390i has a manageable Power and Control Card, providing
power to the different units, such as the Cisco cards, the V384+A card, and the
temperature control system.
current protection. The V390i has a manageable Power and Control Card, providing
power to the different units, such as the Cisco cards, the V384+A card, and the
temperature control system.
Modem V390i Initialization Process
Once powered, the V390i performs the following:
1. Scans for a UHF downstream channel – The modem always stores the last set of
parameters it was able to work with. It therefore first tries to reacquire the last
working downstream channel.
working downstream channel.
2. Synchronizes to the downstream channel – The downstream signal is valid when
the modem has the following:
QAM synchronization.
FEC synchronization.
MPEG frames synchronization.
Recognition of a MAC synchronization message.
3. Receives upstream parameters – The WMTS periodically transmits on the
downstream channel a broadcast message to all modems on the sector regarding
upstream channels in the sector. The upstream information includes symbol rate,
modulation, FEC, preamble and scrambling.
upstream channels in the sector. The upstream information includes symbol rate,
modulation, FEC, preamble and scrambling.
4. Receives bandwidth allocation MAP – The WMTS periodically transmits on the
downstream channel a broadcast message to all modems on the sector regarding
the upstream bandwidth access opportunities of a coming time interval.
the upstream bandwidth access opportunities of a coming time interval.
5. Performs ranging and adjustments – The modem synchronizes with the WMTS
on the upstream timing, frequency and transmission power.
6. Establishes IP connectivity – The modem acquires the network setting (IP
address, subnet mask and more) from the DHCP server. The modem entry in the
DHCP server is configured through the Arcadian Networks Web NMS (refer to the
NMS User Guide).
DHCP server is configured through the Arcadian Networks Web NMS (refer to the
NMS User Guide).