Transcend Information Compact Flash Card CF 266X - Manual (Page 31)

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266X CompactFlash Card
Transcend Information Inc. 31
Note: 1) The sender shall be tested while driving an 18 inch long, 80 conductor cable with PVC insulation
material. The signal under test shall be cut at a test point so that it has not trace, cable or recipient
loading after the test point. All other signals should remain connected through to the recipient. The
test point may be located at any point between the sender’s series termination resistor and one half
inch or less of conductor exiting the connector. If the test point is on a cable conductor rather than the
PCB, an adjacent ground conductor shall also be cut within one half inch of the connector.
The test load and test points should then be soldered directly to the exposed source side connectors.
The test loads consist of a 15 pF or a 40 pF, 5%, 0.08 inch by 0.05 inch surface mount or smaller size
capacitor from the test point to ground. Slew rates shall be met for both capacitor values.
Measurements shall be taken at the test point using a <1 pF, >100 Kohm, 1 Ghz or faster probe and
a 500 MHz or faster oscilloscope. The average rate shall be measured from 20% to 80% of the settled
VOH level with data transitions at least 120 nsec apart. The settled VOH level shall be measured as
the average output high level under the defined testing conditions from 100 nsec after 80% of a rising
edge until 20% of the subsequent falling edge.