Wilder Technologies SATA 2.5 Test Adapter Especificaciones descargar pdf (Pagina 40)

Agilent Technologies, Inc.

Agilent Technologies, Inc. 40 SATA PHY, TSG & OOB Test MOI v.1.1 Revision 1.4

Test TSG-16 - Gen3 (6.0Gbps) Transmitter AC Common Mode Voltage

Purpose: To verify that the AC Common Mode Voltage of the product’s transmitter is within the conformance

limits.

References:

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

[2] Ibid, 7.2.2.2.12

[3] Ibid, 7.4.21

[4] SATA Interoperability Program Unified Test Document, 2.15.16 – Gen3(6Gb/s) AC Common Mode

Voltage

[5] Pre-Test MOI

Resource Requirements:

Same as for TSG-01.

See appendix A for details.

Last Template Modification: March 25, 2009 (Version 1.02)

Discussion:

Reference [1] specifies the Transmitted Signal conformance limits for SATA products. Reference [2]

provides the definition of this term for the purposes of SATA testing. Reference [3] defines the

measurement requirements for this test.

The common mode signal is created by summing TX+ with TX- and dividing by two. It is imperative to

have completely deskewed the measurement inputs of the laboratory load out to the compliance point to

minimize any common mode components due to phase misalignment. AC common mode voltage is

measured in the frequency domain, using a Gaussian windowing method, similar to a spectrum analyzer.

Resolution bandwidth for this measurement is set to 1MHz. The span for the measurement of the

fundamental frequency at 3GHz is from -5350ppm to +350ppm relative to 3GHz. The span for the

measurement of the 2

harmonic at 6GHz is from -5350ppm to +350ppm, relative to 6GHz.

This test requirement is only applicable to products running at 6Gb/s.

Frequency domain measurement of 3GHz and 6GHz common mode voltage magnitude

At 3G

28.70dBm +

43.9794 =

15.28dBmV

GHz

dBm +

43.9794 =

0.06

dBmV

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Wilder Technologies SATA 2.5 Test Adapter Especificaciones Pagina 40