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Spinpoint M8U-Internal Product Manual REV 3.4
44
INSTALLATION
6.2.2.6 High-speed (480Mb/s) Signaling Levels
The high-speed signaling voltage specifications in Table 6-2 must be met when measuring at the connector
closest to the transceiver, using precision 45Ω load resistors to the device ground as reference loads. All
voltage measurements are taken with respect to the local device ground.
Table 6-2: High-speed Signaling Levels
Note 1: Measured with a 45Ω resistor to ground at each data line, using test modes Test_J and Test_K
Note 2: A high-speed driver must never “intentionally” generate a signal in which both D+ and D- are driven to a level above
200 mV. The current-steering design of a high-speed driver should naturally preclude this possibility.