NTi Audio XL2 Sound Level Meter - Manual (Page 92)

92
Delay Time
Delay Measurement - Getting Started
The delay time measurement is conducted between the syn-
chronized electrical input signal and the acoustic signal mea-
sured by the built-in voice note microphone. In this example,
the delay between speakers A and B in the illustrated audito-
rium is measured.
lecturer
speaker A
front left
speaker
front right
speaker B
sub left
speaker
sub right
measurement
position
Test Preparations
Prepare the delay test signal; use either the •
NTi Audio Test CD •
NTi Audio Minirator for analog systems •
NTi Audio Digirator for digital or Dolby/DTS systems •
Start the delay test signal. •
Connect the generated delay test signal with an audio cable •
to the RCA or XLR input of the XL2, e.g. take the reference
signal from an auxiliary channel of a mixing console.
Select XLR or RCA input in the upper XL2 menu
•
Set the actual environment temperature, to ensure that the •
distance is displayed correctly later.