Advanced Troubleshooting - HP X5400 Network Manual

Sometimes performance works best when the antennas at both components of the
wireless network are pointing vertically straight up. In other cases positioning the
antennas on all devices at a 45-degree angle yields the best results. Performance
usually degrades significantly if the antennas are positioned vertically on one device (i.e.
your home networking access point/router) and horizontally on the other device (i.e. the
Media Center Extender). Try different antenna positions while the Bandwidth Monitor is
running to see how it affects your network performance.
NOTE: Some wireless networking components have fixed internal antennas instead of
external antennas; in these cases it may look as if the device doesn't have an antenna at
all. For devices with internal antennas you can rotate the device to change the antenna
reception.
Fully Wired Networks
If you have a completely wired Ethernet network connecting from your Media Center PC
to your Media Center Extender, double-check that all networking components support
100 Mbps. Older 10 Mbps Ethernet networking "hubs" are not supported and will cause
network bandwidth problems.

Advanced Troubleshooting

Elements That May Cause Wireless Network Interference
802.11g wireless networks share their airspace with a number of other devices and
technologies which may influence overall performance. The following are things to
consider which might affect your wireless network if they are in your house or nearby:
Microwave oven use
2.4 GHz cordless phones
2.4 GHz baby monitors
2.4 GHz analog wireless video senders
Neighboring wireless networks
Solving these types interference problems can be challenging. If a significant interruption
occurs for a short period of time someone may be using a microwave oven nearby.
Consider replacing your 2.4 GHz cordless phones or baby monitors with 900 MHz
models if that's feasible. See "Changing Wireless Networking Channels" below for