User's Manual

ARCXTEND USER MANUAL – R1.4, ISSUE 4
Copyright 2005 Arcwave, Inc. 34
modem.
If more than 30 dB of
attenuation is required and the
Select Downstream Power
setting is High, change the
setting to Medium.
directional amplification.
Redo the CPE alignment
process
Verify the wireless range and
LOS path between Hub and
CPE are within specified
limits.
Check DC power level at input
to CPE.
Check coaxial cable
connections.
Verify the wireless range and
LOS path between Hub and
CPE are within specified
limits.
Cable Modem Installation
)Connect the cable modem to the modem side of the DC power inserter as shown in 4-4 and
Figure 4-6. Complete installation of the cable modem using normal procedures.
If the cable modem registers with the network
Verify the downstream signal level
) Using the cable modem’s diagnostic interface, check that the downstream signal level is within
the desired cable modem operating range.
DS received power level is too high to cable
modem
DS received power level is too low
If the DS received power level is too high
install one or more 10 dB (AX3155-ECF-10)
or 20 dB (AX3155-ECF-20) low pass
attenuators between the power inserter and
the cable modem.
If more than 30 dB of attenuation is required
and the Select Downstream Power setting is
High, change the setting to Medium.
Check that the Select Downstream Power
setting is correct.
Reduce the cable and RF hardware loss
between CPE and cable modem or add bi-
directional amplification.
Redo the CPE alignment process
Verify the wireless range and LOS path
between Hub and CPE are within
specified limits.
Table 4-2: DS received power level troubleshooting
Verify the upstream signal level
)Using the cable modem’s diagnostic interface, check the upstream signal (US) level is within the
desired operating range.