User's Manual

18 Manual tests 69
7signal Ltd, Panuntie 6, FI-00620 HELSINKI, FINLAND, [phone], [e-mail], www.7signal.com
7signal Sapphire Carat Carat User Guide Release 3.1
Elements of the results image:
• MOS result: The distribution of MOS values related to test duration. The color coding
indicates quality.
• Loss Rate: Packet loss as a function of test duration.
• Average Jitter: Variation in delay as a function of test duration.
• Codec: The distribution of codecs used during the test. If only one result is visible, the
codec was not changed during the test.
• Levels: Signal and noise levels during the test, averaged over the duration of the test.
• SNR: Signal/noise ratio during the test, averaged over the duration of the test.
Test result
5
Excellent
4
Good
3
Fair
2
Poor
1
Bad
In practice, the supported codec’s can reach MOS scores that are slightly above 4.
18.14 “HTTP URL test”
This test is used for “downloading” actual WWW-pages.