User's Manual

ARCXTEND USER MANUAL – R1.4, ISSUE 4

The upstream output power out of the Hub into the cable plant is controlled by the Upstream

Attenuation parameter. This parameter is automatically set by the Hub based on the transmit

power setting of the Embedded Cable Modem (ECM) contained in the Hub.

The gain of the CPE is fixed in both the upstream and downstream direction. The transmit power of

the CPE directed towards the Hub will vary based on the input RF signal received from the cable

modem. The CPE can accept an input RF signal between 20 and +58 dBmV from a cable modem.

The downstream output power out of the CPE directed towards the cable modem will vary based on

the distance between the Hub and the CPE. It is typically in the range of +10 to +30 dBmV.

Arcwave provides specially designed low pass attenuators to reduce the downstream power level to

within the – 15 dBmV and +15 dBmV operating range of a cable modem. Note that for 256 QAM

operation that the downstream power level into the cable modem must be at least -6 dBmV.

Element Management

Each Hub contains Arcwave’s ARCSmart intelligent network management which combines an

embedded DOCSIS 2.0 compliant cable modem, SNMP-compliant Arcwave Enterprise MIB

(management information base) and a processing engine with upgradeable software to support low

cost configuration monitoring, and troubleshooting of a Hub.

Management of the CPE can be most cost effectively achieved using the capabilities built into the

subscriber cable modem. The CPE has no settable parameters so management is not required.

Applications

ARCXtend Wireless Drop

Figure 2-3: Wireless Drop

ARCXtend can be deployed as a wireless drop connecting customers located across a parking lot,

highway, or river or in areas with zoning restrictions to your plant. An AX1455-SM strand mount hub

mounts directly on your plant: