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DTC500 Series Card Printer/Encoders Troubleshooting Guide (Rev. 3.0)
202
Adjusting the Magnetic TOF
Use this setting to position the magnetic data at the correct distance from the leading edge of
the card.
• The Magnetic TOF is the distance from the edge of the card to the Start Sentinel (SS).
• The Start Sentinel marks the beginning of the encoded data. (Note: According to the
magnetic recording standard (ISO 7811), the correct Start Sentinel distance is 0.293
inches ± 0.020 inches (7.44 mm ± 0.51 mm) from the leading edge of the card.)
Step Procedure
1 a. From the application program, print and encode a test card.
b. Measure this distance by making the data visible using a magnetic viewer or
developer solution.
c. Alternatively, use a Magnetic Card Analyzer to measure the Start Sentinel
distance.
2 a. Use a magnetic viewer or developer solution or spray to make the magnetic
data visible (in order to identify the Start Sentinel as the first set of magnetic
lines or first one-bit, which are visibly closer together than the large number
of evenly spaced lines or leading zero-bits that fill the space to the edge of
the card, as shown on the next page).
b. Use a magnifying device with a built-in measuring scale to measure the
distance from the edge of the card to the Start Sentinel in the data, as shown
on the next page.
3 If the Start Sentinel is too far from the leading edge of the card, reduce (or make
negative
) the Magnetic TOF setting needs.
OR
If the Start Sentinel is too close to the leading edge of the card, increase (or
make positive) the Magnetic TOF setting needs.
4
Select MENU, Setup Printer, and Magnetic TOF.
5 Record the Magnetic TOF value on the test card last printed.
Continued on the next page
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