Vaisala HMT140 User Manual page 53

4. Use the Ping from PC function in the HMT140 Utility (if this PC is connected) and see if
you can ping the HMT140 when it is in Config mode. Go to the Status tab to determine the
IP address.
5. Use a static IP address temporarily and connect to the network to determine if HMT140
transmissions are being received by the host.
6. Make sure the DHCP Server has not exhausted the number of assignable IP addresses.
7. Check if the DHCP Server needs to be configured to accept this type of device (it is
possible the DHCP Server is taking too long to respond to the request).
I can connect to the network, but host is not receiving UDP
packets
1. Verify your network settings.
2. Verify that you are connected to the right network.
3. Verify that the Destination IP address is correct.
4. If using the broadcast address, verify that the network can support broadcasts. Most
routers by default will not route broadcast traffic.
5. Use the Ping from PC feature if this PC is connected or a PC on the network and ping the
host. Also try pinging the HMT140 when it is in Config mode.
6. Check the following:
• Is the host is ready to receive the transmit packets?
• Is the host configured to listen for the UDP packets?
• Is the host software running?
• Is firewall software installed at the host that would prevent the UDP traffic?
• Is there anything on the network that would restrict packets from being routed (like
MAC filtering)?
7. Perform a destination test (use the Contact Destination Host function from the Tools
tab).
8. If using a hostname for the destination address, make sure the DNS address is correct
(whether set as static or obtained through the DHCP server).
9. Check if the hostname is being resolved in Config mode (go to the HMT140 Utility Status
tab and examine the Resolved Destination field).
I can connect to the network and Contact Destination using the
utility, but host is not receiving UDP packets in Transmitter
mode
1. Verify your network settings.
2. Check if the access point using Auto Channel mode is switching between channels. The
access point may have switched to a different channel than is set up in the HMT140.
Chapter 6 – Troubleshooting
51