E:AUDIO TESTS (ITU standards only)

Tests 1-3 were carried out with test signals inserted into the AUX (Auxiliary) input.

Test 1: Frequency response (-3dB)

(Insert a -6dB signal at the local site, measure the frequency corresponding to an audio level reduction of 3dB at the remote site from the level received when a 1kHz tone is transmitted).

Siren™ 14, 24kbit /s

Siren™ 14, 48kbit /s

14kHz

14kHz

Test 2: Headroom (measured on a Siren™ 14, 48kbit/s connection)

(Insert increasing amplitude 1kHz tone at local site, monitor for overload distortion at remote site)

Overload occurs at:

+10dBm

Test 3: Audio Level

(Insert -6dBm 1KHz tone at local site, monitor received level at remote site) Measure the level on the VCR output with the local volume at mid range.

Remote site signal measures: -18dBm measured on audio output

Test 4: Echo Cancellation

Setup The echo canceller is fully automatic in operation.

 

Lecture Theatre

Room

Audio levels adequate? (Y/N)

Not tested

Yes

Audio quality acceptable? (Y/N)

Not tested

Yes

Echo cancellation acceptable? (Y/N)

Not tested

Yes

Quality of double talk

Not tested

Very Good

Subjectively the quality of the Siren™ 14 audio and echo cancellation was excellent. The provision of: audio level meters for the microphone and VCR inputs; level adjustment on the VCR inputs and an internal tone generator, are all very useful operational features.

17

Page 20
Image 20
Polycom VSXTM 6000 appendix

VSXTM 6000 specifications

The Polycom VSXTM 6000 is a leading-edge video conferencing system tailored for enhancing communication in a variety of business environments. Known for its high-definition capabilities and robust features, the VSX 6000 is designed to facilitate seamless interactions among teams, clients, and partners, regardless of their geographical locations.

One of the standout features of the Polycom VSX 6000 is its exceptional video quality. It supports resolutions of up to 720p, providing crystal-clear images and ensuring that participants can engage fully with visual cues during meetings. The system employs advanced H.264 video compression technology, significantly lowering bandwidth requirements while improving video clarity. This makes it an ideal choice for organizations with varying network capacities, allowing for consistent and reliable connections.

In addition to its visual capabilities, the VSX 6000 is equipped with advanced audio technologies, including Polycom's renowned Acoustic Clarity technology. This feature ensures that all participants can hear and be heard without the distractions of echo or background noise, allowing for a more natural and interactive meeting experience. The system supports stereo audio, enhancing the listening experience and making remote participants feel as if they are part of the same room.

The VSX 6000 also stands out for its user-friendly interface. A simple and intuitive menu allows users to quickly initiate calls, access various features, and manage settings with ease. This facilitates adoption across organizations without extensive training, empowering employees to leverage video conferencing to its fullest potential.

For added flexibility, the Polycom VSX 6000 is compatible with various video conferencing standards, ensuring that users can connect with other systems seamlessly. This interoperability allows for collaboration with external partners and clients, enhancing the overall functionality of the system.

Security is another priority in the design of the VSX 6000. The system incorporates encryption protocols to safeguard sensitive information exchanged during meetings, making it suitable for industries where confidentiality is critical.

In summary, the Polycom VSXTM 6000 is a versatile and reliable video conferencing solution, offering high-definition video, superior audio quality, a user-friendly interface, and robust security features. Its adaptability to different network environments and compatibility with various standards make it an excellent choice for businesses looking to enhance their remote communication capabilities.