half track - Test Country Drug Testing - Drugs of Abuse Tests
Generic Name :
crack
Street Name :
Half track
Drug Base :
Cocaine
Description :
(1) A recording format in which two parallel tracks are recorded in a single pass on a 1/4" tape, each track using slightly less than half of the tape width. On some machines, a very narrow track with SMPTE or other synchronizing information is recorded and reproduced in the guardband. In this case, the data is frequency-modulated onto a very high-frequency tone in order to minimize crosstalk or bleeding into the audio. (2) A tape machine which records on half of the tape width only. ...
Following kit(s) can be used for the substance above:
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