Specifications

SATA-IO Confidential 50
2.12.4. PHY-04 : Spread-Spectrum Modulation Deviation
2.12.4.1. Device/Host Expected Behavior
See sections 7.2.2.1.6 and 7.3.3 of Serial ATA Revision 2.6.
This test requires support for Spread Spectrum Clocking (SSC), which is optional.
• See section 7.4.11 of Serial ATA Revision 2.6.
Measurement Requirements
• This test is only run once at the maximum interface rate of the product (1.5Gb/s or 3Gb/s).
• The value reported as the result must be the single total range value relative to nominal of the SSC
modulation deviation, using the equations below, where “Min” is the mean of 10 recorded values of the
minimum peaks and “Max: is the mean of 10 recorded values of the maximum peaks.
• Calculate max deviation = (Measured Max – Nominal)/Nominal * 1e6 ppm
• Calculate min deviation = (Measured Min – Nominal)/Nominal * 1e6 ppm
a) Max SSC
tol
measured (using mean of 10 recorded values) less than +350ppm.
Pass/Fail Criteria
b) Min SSC
tol
measured (using mean of 10 recorded values) greater than -5350ppm.
2.13. Phy Transmitter Requirements
During the testing execution for all TX test requirements, it is essential that the product under test be able to complete
an initial OOB sequence through the device COMWAKE. This is to allow product calibration to occur prior to and/or
during the initial power on and detect sequences.
2.13.1. TX-01 : Pair Differential Impedance
2.13.1.1. Device/Host Expected Behavior
See section 7.2.2.2.1 of Serial ATA Revision 2.6.
• See section 7.4.22 of Serial ATA Revision 2.6.
Measurement Requirements
• This test requirement is only applicable to products running at 1.5Gb/s. For products which support 3Gb/s,
this test is not required.
• Testing of this requirement must be completed during transmission of the Mid Frequency Test Pattern
(MFTP), The amplitude of a TDR pulse or excitation applied to an active transmitter shall not exceed
139mVpp (-13.2dBm 50 ohms) single ended.
• Verify that both the minimum [TX-01a] and maximum [TX-01b] results for the pair differential impedance
measured between 85 ohms and 115 ohms (for products running at 1.5Gb/s)
Pass/Fail Criteria
• NOTE : The verification of this result may not be required. If a product which supports 1.5Gb/s product
passes TX-06, then it is not required that this test be verified. This result must be verified for a 1.5Gb/s
product if it fails TX-06.
2.13.2. TX-02 : Single-Ended Impedance (Obsolete)
2.13.2.1. Device/Host Expected Behavior
See section 7.2.2.2.2 of Serial ATA Revision 2.6.