User's Manual

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From the Client Manager main window, pull down the Advanced menu and select the
item Card Diagnostics. You will see the Station Name (name of the local computer),
and the MAC Address of the WLAN Card in the Emerald USB Antenna.
Click the Test Card Now button to test the status of the following components:
§ Driver
§ Driver/Utility Match
§ Driver/Firmware Match
§ Utility/Firmware Match
§ Hardware Integrity
§ Firmware Integrity
§ Error details
CAUTION: Running the Card Test will disrupt normal operation of your Emerald
USB Antenna. This may result in a loss of your current connection to your network.
When you click the Test Card Now button, the Client Manager program will
display a warning that allows you to either abort or proceed with the Card Test.
3.6 Link Test
You can use the link test mode to get detailed diagnostic information about the quality of
the radio link between your Client Manager station and one specific test partner. Subject
to the type of wireless network you are connected to, the test partner may be either an
Access Point or another WLAN client station.
NOTE: The Link Test only works with other YDI Diamond or Emerald products or
ORiNOCO Access Point or products. If the Link Test option is unavailable but
you are connected to an infrastructure (Access Point) network, try using the
Site Monitor (described below).
To start the Link Test, from the Client Manager main window, pull down the Advanced
menu and select Link Test. The Link Test will analyze the messages as received on
both ends of the link to determine:
§ Radio Quality, by comparing the Signal Level to the Noise Level and calculating
the Signal to Noise Ratio (SNR).
SNR is a dynamic indicator that indicates the relative strength of the radio signal
(Signal Level) versus the radio interference (Noise Level) in the radio signal path.
The color-coding of the SNR-bar indicates the link quality:
o Green – Communication quality is Excellent or Good; no action required.
o Yellow – Communication quality is Marginal; no action required.
o Red – Communication quality is Poor; see Appendix A “Troubleshooting”.
In most environments, SNR is the best indicator for the quality of the radio link
between transmitter and receiver. A higher SNR value means a better quality