POLYCOM -Polycom Certified Videoconferencing Engineer (PCVE) Set 2

enhanced video quality multipoint data collaboration cross-platform data collaboration multipoint data conference control

56 Kbps to 384 Kbps ✘ 56 Kbps to 1536 Kbps ✘ 56 Kbps to 1920 Kbps ✘ 112 Kbps to 384 Kbps ✔

QCIF video ✘ CIF and QCIF video ✘ 30 frames per second ✘ still image transmission ✔

Cameras react to light the same as one's eye and video monitors accurately render the video information so what one sees by eye is what the far-end sees. Cameras have limits to the range of light levels which can be accommodated and tend to process thedarker regions further toward black than what one's eye sees. Codecs have the same limits as cameras and therefore will not change the perceived qualities of thevideo as rendered by the cameras. Codecs have more restrictive limits than cameras, and the best way to accurately assess the videoquality sent to the far-end is to view a video scene fully coded and then decoded.

It widens the field at full zoom. ✘ It narrows the field at full zoom. ✘ The field remains the same regardless of zoom. ✘

You need to move the microphone. You do not want to hear the other parties. You need to have a private side conversation. You are listening and your room is very noisy.

a mixer a lapel microphone a desktop microphone a sound pressure meter

48 volts DC applied to a telephone circuit center pair used to provide power to the telephone set ✘ 12 volts DC applied to the tip and ring of a TRS connector used to power amplified headphones ✘ a DC voltage applied to the center pin of an RCA type connector used to power remote pre-amplifiers ✘ a DC voltage applied to pins 2 and 3 of an XLR connector returning through pin 1, used to powermicrophones ✔

Audio mixers can be connected into a line-level input. You can use line-level or mic-level for any audio input device. Line-level and mic-level always have different impedance values. Voltage ranges are not the same between line-level and mic-level.

It provides phantom power to microphones. It provides gain to convert mic-level signals to line-level signals. It provides a means to adjust the relative gain of different microphones. It provides a means to adjust the relative gain of loudspeakers in the room. It provides a means to connect 2-wire telephone service to a conference system.