MagTek MT-211232 RS-232 1 OR 2 TRACK - Manual (Page 32)

MT-211 RS-232 Swipe Reader, 1 or 2 Tracks
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10. The above sequence will appear similar to the following:
%ABCDEFGHIJKLMNOPQRSTUVWXYZ11111111111111111111111111111111111111111
1111111111111111?;222222222222222222222222222222222222222222222?RK1234567890A
BK1234567890KS1234567890XK
11. When a sequence similar to the above appears similar on the screen, the test is complete.