Wilder Technologies SATA 2.5 Test Adapter Dokumentacja Pobierz pdf (Strona 27)

Agilent Technologies, Inc.

Agilent Technologies, Inc. 27 SATA PHY, TSG & OOB Test MOI v.1.1 Revision 1.4

Test TSG-06 - Amplitude Imbalance (Obsolete)

Purpose: To verify that the Amplitude Imbalance of the Products Under Test’s (PUT’s) transmitter is within the

conformance limits.

References:

[1] Serial ATA Revision 3.0, 7.2.1, Table 31 – Transmitted Signal Requirements

[2] Ibid, 7.2.2.2.17 – TX Amplitude Imbalance (Gen2i, Gen1x, Gen2x)

[3] Ibid, 7.4.18 – TX Amplitude Imbalance

[4] SATA Interoperability Program Unified Test Document, 2.15.6 – Amplitude Imbalance

[5] Pre-Test MOI

Resource Requirements:

Same as for TSG-01.

See appendix A for details.

Last Template Modification: May 7, 2006 (Version 1.02)

Discussion:

Reference [1] specifies the Transmitted Signal conformance limits for SATA products. This specification

includes conformance limits for the TX Amplitude Imbalance. Reference [2] provides the definition of this

term for the purposes of SATA testing. Reference [3] defines the measurement requirements for this test.

Amplitude Imbalance is measured with HFTP and MFTP. This test requirement is only applicable to

products running at 3Gbps.

This parameter is a measure of the match in the single-ended amplitudes of the TX+ and TX- signals. This

parameter shall be measured and met with both the HFTP and MFTP patterns. Clock-like patterns are used

here to enable the use of standard mode-based amplitude measurements for the sole purpose of determining

imbalance. Due to characteristics of the MFTP, it is required that the measurement points be taken at 0.5UI

of the 2

bit within the pattern. All amplitude values for this measurement shall be the statistical mode

measured at 0.5UI nominal over a minimum of 10,000UI The amplitude imbalance value for each pattern

is then determined by the equation:

absolute value(TX+ amplitude - TX- amplitude) / ((TX+ amplitude + TX- amplitude)/2)

Test Setup:

1. The N5411B SATA compliance software will prompt for HFTP and MFTP when it needs those patterns.

When prompted, follow the procedures in reference [5] to enable those BIST-TAS patterns. Or keep

products in BIST-L.

2. Plug the test fixture into the products. The test fixture is connected to channels 1 and 3 of the scope by

two 36” SMA cables (Rosenberger or equivalent). OBSERVE the signal on the scope. If it is correct, press

OK in the N5411B prompt. If not, the products did not properly handle BIST Activate FIS; a non-standard

way to make it produce the desired pattern will be required.

Test Procedure:

This parameter is covered by Agilent Technologies, Inc. N5411B automated SATA compliance software,

revision 1.02 or later. Either “PASS” or “FAIL” is shown for the rise/fall imbalance test in the report

generated at the completion of the testing.

Observable Results:

The TX Amplitude Imbalance value shall be less than 10% for Gen1x, Gen2i, Gen2m, and Gen2x products.

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