Audio Recording - Vitek VT-SCT-U4 Manual

Status: After linking up, the screen will display "online", if not linked up or there is
an open circuit, the screen displays "open circuit", if cable pair has a short circuit, the
screen displays "short circuit".
Length: The max test length is 180 meters. When cable is open circuit or short circuit,
test the cable length. If screen display is "online", the testing result will be inaccurate.
Cable quality test: Green is good quality cable, Yellow is Poor quality cable, Red is
wet cable. The attenuation value will be displayed when the cable is over 10 meters.
Advanced Test: Test cable pair status, length, attenuation, reflectivity, impedance,
skew and other parameters.
Attenuation reflectivity: After linking up, if the reflectivity value is 0, the best
quality communication is occurring
Impedance: After linking up, if the impedance value is 100 Ω, the best quality
communication has been obtained. The range is generally 85-135 Ω.
Skew: After 1000M link up, when skew value is 0ns, it is at the best quality
communication. If over 50ns, it will cause a Bit Error Rate in the transmission.
Click "Help", check the instruction of all parameters.

3.3.14 Audio Recording

Connect an audio device to the IP tester's audio input port. Click the
Recorder app. Click the red button to stop, and the unit will prompt you to save the recording
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icon to enter the Audio