ASV 3270, User Manual

Page: 8 / 12

8
Mode 4
Polarity Test
The polarity test mode is useful
to test an unknown pair of
speaker wires for the correct
phasing.
A special polarity test tone is required in order for this mode to
work.
This tone can be downloaded from
http://airsoundvision.com/asv3270
On this page is an MP3 file for copying to a USB flash drive or
data CD. You can also use Windows Media Player or third party
software to create an Audio CD from this file.
Once you have downloaded the file and created the required
media, start playing the file in the head unit at a moderate
volume.
Connect the ASV 3270 to a pair of speaker wires. If LED A
lights, the speaker wire connected to the red test lead is
positive.
NOTE 1 : Some equipment will introduce phase reversal over
the entire system. This is not a problem except all speaker
wires will read as reversed.
NOTE 2 : Setting the volume too high or too low may produce a
false reading.