User's Manual

ARCXTEND 5.8 GHZ USER MANUAL – R1.0, ISSUE 1

between CPE and cable modem or add

amplification.

Redo the CPE alignment process

Verify the wireless range and LOS path

between Hub and CPE are within specified

limits.

Table 4-4: US transmit power level troubleshooting

If the cable modem doesn’t register with the network

If the cable modem does not register with the network, troubleshoot as follows:

Problem Solution

Does not detect and lock on DS channel Check to see if the MER of the downstream

RF channel is within specificied limits:

MER should be at or above 27 dB for 64

QAM, and 31 dB for 256 QAM. If it is not,

check the following:

Verify that the Select Downstream Power

setting is correct for the downstream

modulation and wireless range.

Change Downstream Air Frequency to a

different channel to rule out interference.

Verify the wireless range and LOS path

between Hub and CPE are within specified

limits.

Does not detect and lock on US channel Using the cable modem’s diagnostic

interface, see if the cable modem is seeing

the correct upstream RF channel.

If it does see the channel and can’t lock on,

reduce the Upstream Attenuation setting at

the Hub.

If it does not see the channel, and Cable

Interface Control and Automatic Frequency

Set are enabled, verify that the Hub ECM and

the subscriber cable modem are assigned to

the same upstream frequency and are

excluded from an upstream load balancing

group.