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Appendix 3 - Radvision XT5000 - Detailed audio test results
Download as PDFTest 1: Frequency response (-3 dB)
(Insert -6 dB signal at local site, measure at remote site)
|
G.711 A law |
G.722.1 |
AAC-LD, |
G.719 |
|
4.2 KHz |
7.0 KHz |
14.5 KHz |
20.0 KHz |
Test 2: Headroom (measured on AAC-LD signal coding)
Insert increasing amplitude 1 KHz tone at local site, monitor for overload distortion at remote site
Overload occurs at: +9dBm
Test 3: Audio level
(Insert -6dBm 1KHz tone at local site, monitor received level at remote site.)
As the audio output level is affected by the volume control this test was not carried out.
Test 4: Echo Cancellation
Setup The echo canceller is fully automatic in operation. The quality of echo cancellation and doubletalk from the system was excellent.
|
Lecture Theatre |
Room |
|
|
Audio levels adequate? (Yes/no) |
Not tested |
Yes |
|
Audio quality acceptable? (Yes/no) |
Not tested |
Yes |
|
Echo cancellation acceptable? (Yes/no) |
Not tested |
Yes |
|
Quality of double talk |
Not tested |
Excellent |
