Wilder Technologies SATA 2.5 Test Adapter Especificaciones descargar pdf (Pagina 25)

Agilent Technologies, Inc.

Agilent Technologies, Inc. 25 SATA PHY, TSG & OOB Test MOI v.1.1 Revision 1.4

Test TSG-04 - AC Common Mode Voltage

Purpose: To verify that the AC Common Mode Voltage 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, 7.2.2.2.11 – TX AC Common Mode Voltage (Gen2i, Gen1x, Gen2x)

[3] Ibid, 7.4.20 – TX AC Common Mode Voltage

[4] SATA Interoperability Program Unified Test Document, 2.15.4 – AC Common Mode Voltage

[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 AC Common Mode Voltage. Reference [2] provides the definition

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

test.

TSG-04 is tested with MFTP. This test requirement is only applicable to products running at 3Gbps.

The cables connecting the Wilder Technologies SATA Gen3 Receptacle Adapter SATA-TPA-R or ICT-

Lanto SATA Receptacle Gen 3 TF-1R31 or Crescent Heart Software TF-SATA-NE/ZP or TF-eSATA-

NE/ZP test adapter or equivalent to the scope must be deskewed, as discussed in Appendix A. Skew

contributes directly to common mode spikes which if large enough, even though they are low pass filtered

to half the bit rate, can cause failure.

Test Setup:

1. The N5411B SATA compliance software will prompt for MFTP. When prompted for MFTP, follow the

procedures in reference [5] to enable BIST-TAS MFTP. 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 MFTP, 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. The test is performed as (TX+ + TX-)/2, low-pass filter applied with a -3dB cutoff

frequency of bit-rate/2 and peak-peak amplitude of the filter output measured as the final AC common

mode voltage value. Either “PASS” or “FAIL” is shown for the common mode voltage test in the report

generated at the completion of the testing.

Observable Results:

The AC Common Mode Voltage value shall be less than 50 mVp-p for Gen2i and Gen2m products.

Possible Problems:

Please see TSG-03.

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Wilder Technologies SATA 2.5 Test Adapter Especificaciones Pagina 25