Rf And Digital Subsystem; Ethernet Subsystem - Cisco CVA122 Hardware Installation Manual

Troubleshooting Subsystems
If you are unable to resolve the problem, contact your internal service organization for
Note
instructions and assistance.

RF and Digital Subsystem

The use of RF and digital signals on the same cable can lead to interference if the HFC network is not
correctly configured.
Is the downstream video signal being received at the ground block or at the tap?
Step 1
Connect a premium services cable converter to the ground block or at the tap and contact field service
dispatch. Ask the CMTS system administrator to check if they can locate the box on the network by
sending an impulse, or on-demand, video signal to the converter.
If field service can locate the converter at the ground block or at the tap, repeat the test with the cable
voice adapter connected to the cable end near the computer.
If field service cannot locate the converter at the cable end, but can locate the converter at the ground
block or tap, replace the cable from the ground block or tap to the cable end.
Check the adjacent video channel. The digital data signal should be approximately in the range of -2 to
Step 2
+15 dBmV on a nearby analog channel. Confirm this value using a portable field strength meter, or
power meter, to measure the adjacent analog video signal.

Ethernet Subsystem

Use the following procedure if you cannot communicate with the Internet from a PC that connects to
the Cisco CVA122/CVA122E Cable Voice Adapter using an Ethernet connection.
Step 1 Is the Ethernet LED on the front panel of the Cisco CVA122/CVA122E Cable Voice Adapter turned on?
If the Ethernet LED does not light, do the following until the LED begins to light:
a.
b.
c.
d.
e.
f.
Cisco CVA122/CVA122E Hardware Installation Guide
4-8
Verify that the Cisco CVA122/CVA122E Cable Voice Adapter and computer are both powered on.
Disconnect the Ethernet cable between the cable voice adapter and computer and reconnect it,
making sure it is firmly seated in each connector.
Verify that the Ethernet cable is connected to the proper RJ-45 connector on the computer. If the
computer has multiple RJ-45 connectors, verify that the one you are using is the connector for the
Ethernet card configured for use with the cable voice adapter.
Verify that the Ethernet cable is the proper type for the equipment used. A straight-through cable
should be used when connecting the cable voice adapter to a computer. A crossover cable should
be used when connecting to an Ethernet hub (although if the Ethernet hub has an uplink port, you
might be able to use a straight-through cable).
If using an Ethernet hub, verify that the correct Ethernet cables are connecting the computers to the
hub. (See the hub's documentation for details on the correct cables that should be used.)
If using an Ethernet hub, try connecting a computer directly to the cable voice adapter using a
straight-through cable.
Chapter 4 Troubleshooting
OL-0799-02 (05/2001)