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Rohde & Schwarz R&S RTP-K28 User Manual

Rohde & Schwarz R&S RTP-K28 User Manual

C-phy compliance test
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R&S
RTP-K28
C-PHY Compliance Test
User Manual
(;ÝÎÖ2)
1179647202
Version 01

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Summary of Contents for Rohde & Schwarz R&S RTP-K28

  • Page 1 ® R&S RTP-K28 C-PHY Compliance Test User Manual (;ÝÎÖ2) 1179647202 Version 01...
  • Page 2 This manual describes the C-PHY compliance test procedures with the following option: ● ® R&S RTP-K28 (1802.9621.02) - C-PHY The tests require the R&S ScopeSuite software. The software contained in this product uses several valuable open source software packages. For information, see the "Open Source Acknowledgment"...

  • Page 3: Table Of Contents

    ® Contents R&S RTP-K28 Contents 1 R&S ScopeSuite overview..............5 2 Preparing the measurements..............7 Test equipment......................7 Installing software and license..................7 Setting up the network....................8 Starting the R&S ScopeSuite..................8 Connecting the R&S RTP..................... 9 Report configuration....................10 3 Performing tests...................12 Starting a test session....................12 Configuring the test....................
  • Page 4 ® Contents R&S RTP-K28 4.6.1 Test setup........................55 4.6.2 Performing group 2 test cases..................56 4.6.3 Meausrements......................57 User Manual 1179.6472.02 ─ 01...

  • Page 5: S Scopesuite Overview

    ® R&S ScopeSuite overview R&S RTP-K28 1 R&S ScopeSuite overview The R&S ScopeSuite software is used with R&S RTP oscilloscopes. It can be installed on a test computer or directly on the oscilloscope. For system requirements, refer to the Release Notes. The R&S ScopeSuite main panel has several areas: ●...
  • Page 6 ® R&S ScopeSuite overview R&S RTP-K28 a) Right-click on the compliance test you want to hide. The icon of the test changes, see Figure 1-1. Now with a left click you can hide the test. Figure 1-1: Unpin icon b) Click on "Title View" to show a list of the available test cases. By clicking a test case in the show list, you can pin/unpin it from the main panel.

  • Page 7: Preparing The Measurements

    ® Preparing the measurements R&S RTP-K28 Installing software and license 2 Preparing the measurements 2.1 Test equipment For C-PHY compliance tests, the following test equipment is needed: ● R&S RTP oscilloscope with 4 channels and at least 13 GHz bandwidth ●...

  • Page 8: Setting Up The Network

    ® Preparing the measurements R&S RTP-K28 Starting the R&S ScopeSuite For system requirements, refer to the Release Notes. To install the license key on the R&S RTP ► When you got the license key of the compliance test option, enable it on the oscil- loscope using [Setup] >...

  • Page 9: Connecting The R&S Rtp

    ® Preparing the measurements R&S RTP-K28 Connecting the R&S RTP To start the R&S ScopeSuite on the instrument, in the R&S RTP firmware: ► In the "Apps" dialog, open the "Compliance" tab. 2.5 Connecting the R&S RTP If the R&S ScopeSuite is installed directly on the instrument, the software detects the R&S RTP firmware automatically, and the "Oscilloscope"...

  • Page 10: Report Configuration

    ® Preparing the measurements R&S RTP-K28 Report configuration If the connection fails, an error message is shown. 2.6 Report configuration In the "Report Configuration" menu, you can select the format of the report and the details to be included in the report. You can also select an icon that is displayed in the upper left corner of the report.
  • Page 11 ® Preparing the measurements R&S RTP-K28 Report configuration User Manual 1179.6472.02 ─ 01...

  • Page 12: Performing Tests

    ® Performing tests R&S RTP-K28 Starting a test session 3 Performing tests 3.1 Starting a test session After you open a compliance test, the "Session Selection" dialog appears. In this dia- log, you can create new sessions, open or view existing report. The following functions are available for handling test sessions: Function Description...

  • Page 13: Configuring The Test

    ® Performing tests R&S RTP-K28 Configuring the test To open a test session 1. In the R&S ScopeSuite window, select the compliance test. 2. In the "Session Selection" dialog, select the session you want to open and double click on it. Alternatively, select the session and press "Open".

  • Page 14: General Test Settings

    ® Performing tests R&S RTP-K28 Configuring the test 3.2.1 General test settings Each session dialog is divided into several sections: ● "Properties": shows the settings that can be made for the test case selected on the left side of the dialog. You can differentiate between the "All" and the sub test prop- erties In the "All"...

  • Page 15: Getting Test Results

    ® Performing tests R&S RTP-K28 Getting test results 3.2.1.1 Limit manager The "Limit Manager" shows the measurement limits that are used for compliance test- ing. Each limit comprises the comparison criterion, the unit, the limit value A, and a second limit value B if the criterion requires two limits.
  • Page 16 ® Performing tests R&S RTP-K28 Getting test results The test report file can be created at the end of the test, or later in the "Session Selec- tion" dialog. To show a test report 1. In the R&S ScopeSuite window, select the compliance test to be performed. 2.

  • Page 17: Phy Compliance Tests

    ® C-PHY compliance tests R&S RTP-K28 Test configuration for C-PHY 4 C-PHY compliance tests The software closely follows the MIPI Alliance's Conformance Test Suite for C-PHY Specification Version 2.1, dated July 31 , 2020. 4.1 Starting C-PHY compliance tests 1. Select "C-PHY" in the R&S ScopeSuite start window. 2.
  • Page 18 ® C-PHY compliance tests R&S RTP-K28 Test configuration for C-PHY Channel selection Selects the channels for the V and V waveforms. Select, if you are using a "Single-Ended Probes" or "SMA Cables". You can also define a skew value for each channel. When opening a new session, the skew values are read from the oscilloscope and the skew fields are updated.

  • Page 19: Lp-Tx Signaling Requirements (Group 1)

    ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) HS Symbol Rate ← DUT Settings Set the high-speed symbol rate of the DUT. PROGSEQ ← DUT Settings Enable for DUTs that support the programmable sequence. You can also enter the value of the sequence.
  • Page 20 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) Item Description, model Quantity Test fixture UNH-IOL MIPI C-PHY Capacitive Load (CLOAD) Fixture Any MIPI C-PHY device Waveform Requirements A typical LP signal waveform for this test case are as shown in the figure below: User Manual 1179.6472.02 ─...

  • Page 21: Performing Group 1 Test Cases

    ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) 4.3.2 Performing group 1 test cases 1. Start the test as described in Chapter 4.1, "Starting C-PHY compliance tests", on page 17. 2. Select the test case group: "LP-TX Signaling Requirements (Group 1)". 3.

  • Page 22: Measurements

    ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) 4.3.3 Measurements 4.3.3.1 1.1.1 LP-TX thevenin output high-level voltage (V This test case applies to both CPHY versions 1.2 and 2.1. The test case can be run on both "Normal LP" or "LVLP" mode. The purpose of this test is to verify that the Thevenin Output High-Level Voltage (V of the DUT’s LP transmitter is within the conformance limits.
  • Page 23 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) User Manual 1179.6472.02 ─ 01...
  • Page 24 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) 4.3.3.2 1.1.2 - LP-TX thevenin output low-level voltage (V This test case applies to both CPHY versions 1.2 and 2.1. The test case is relevant for "Normal LP" mode. The purpose of this test is to verify that transmitter Output Low-Level Voltage (V ) of the DUT’s LP transmitter is within the conformance limits.
  • Page 25 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) User Manual 1179.6472.02 ─ 01...
  • Page 26 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) 4.3.3.3 Measurements X 15%-85% rise time (t This test case applies to both CPHY versions 1.2 and 2.1. The test case is relevant for "Normal LP" mode. The purpose of this test is to verify that Transmitter Rise Time (t ) of the DUT’s LP transmitter is within the conformance limits.
  • Page 27 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) User Manual 1179.6472.02 ─ 01...
  • Page 28 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) 4.3.3.4 1.1.4 - LP-TX 15%-85% fall time (t This test case applies to both CPHY versions 1.2 and 2.1. The test case is relevant for "Normal LP" mode. The purpose of this test is to verify that the 15%-85% Fall Time (t ) of the DUT’s LP transmitter is within the conformance limits.
  • Page 29 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) User Manual 1179.6472.02 ─ 01...
  • Page 30 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) 4.3.3.5 1.1.5 – LP-TX slew rate vs. C : δV/δt LOAD This test case applies to both CPHY versions 1.2 and 2.1. The test case is relevant for "Normal LP" mode. The purpose of this test is to verify that the Slew Rate (δV/δt ) of the DUT’s LP trans- mitter is within the conformance limits, for specific capacitive loading conditions.
  • Page 31 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) ● the Minimum δV/δtSR is greater than 25 mV/ns across the 400-790 mV region Rising edges For the 50 pF C , for VA, VB, and VC, and for all data Lanes verify that: LOAD ●...
  • Page 32 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) User Manual 1179.6472.02 ─ 01...
  • Page 33 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) User Manual 1179.6472.02 ─ 01...
  • Page 34 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) 4.3.3.7 1.1.7 - LP-TX Period of Exclusive-OR Clock (t LP-PER-TX This test case applies to both CPHY versions 1.2 and 2.1. The test case is relevant for "Normal LP" mode. The purpose of this test is to verify that the period (t ) of the DUT’s LP transmit- LP-PER-TX...
  • Page 35 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) User Manual 1179.6472.02 ─ 01...
  • Page 36 ® C-PHY compliance tests R&S RTP-K28 LP-TX signaling requirements (group 1) 4.3.3.8 1.1.8 – t value LP-EXIT This test case applies to CPHY 2.1. The test case is relevant for "Normal LP" mode. The purpose of this test is to verify that the duration that the Lane transmitter remains in the LP-111 (Stop) state after completing an Escape Command or Turnaround Proce- dure and before starting an Escape Command or Turnaround Procedure or High- Speed Transmission Burst (t...

  • Page 37: Hs-Tx Signaling Requirements (Group 2) - Burst Measurements

    ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - burst measurements 4.4 HS-TX signaling requirements (group 2) - burst mea- surements The HS-TX signaling tests verifies various trasnsmitter requirements pertaining to HS signaling. The structure of this group is intended to facilitate the execution of a set of several HS- TX measurements.

  • Page 38: Performing Group 2 Test Cases

    ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - burst measurements Waveform Requirements 4.4.2 Performing group 2 test cases 1. Start the test as described in Chapter 4.1, "Starting C-PHY compliance tests", on page 17. 2. Select the test case group: "HS-TX Signaling Requirements (Group 2)". 3.
  • Page 39 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - burst measurements 4. Set the "Properties" for the measurement: a) Select, if you are using a "Single-Ended Probes" or "SMA Cables". b) Set the channel skew for VA, VB and VC. c) Select the devices "HS mode": "Normal HS"...

  • Page 40: Measurements

    ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - burst measurements 4.4.3 Measurements 4.4.3.1 1.2.1 HS-TX t duration This test case applies to both CPHY versions 1.2 and 2.1. The test case can be run for "Normal HS" mode. The purpose of this test is to verify that the duration (t ) of the final LP-001 state immediately before HS transmission is greater than the minimum conformant value.
  • Page 41 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - burst measurements Measurements The t interval begins at the time where the Lane V signal crosses below V 3-PREPARE (550 mV), and ends at the beginning of the first HS state, at the point where the , and V differential waveforms all cross above the minimum differential threshold level(+/ -40 mV).
  • Page 42 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - burst measurements 4.4.3.4 1.2.4 HS-TX t duration 3-PROGSEQ This test case applies to both CPHY versions 1.2 and 2.1. The test case can be run for "Normal HS" mode. Available, if "PROGSEQ"...
  • Page 43 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - burst measurements The purpose of this test is to verify that the duration the DUT TX drives the final differ- ential states following the payload data of a HS-TX burst(t ), is greater than the 3 - POST minimum required value.
  • Page 44 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - burst measurements For all lanes verify that t is less than 35 ns. REOT 4.4.3.9 1.2.18 HS-TX t value HS-EXIT This test case applies to both CPHY versions 1.2 and 2.1. The test case can be run for "Normal HS"...

  • Page 45: Hs-Tx Signaling Requirements (Group 2) - Continuous Measurements

    ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - continuous measurements 4.5 HS-TX signaling requirements (group 2) - continuous measurements The HS-TX signaling tests verifies various trasnsmitter requirements pertaining to HS signaling. The structure of this group is intended to facilitate the execution of a set of several HS- TX measurements.

  • Page 46: Performing Group 2 Test Cases

    ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - continuous measurements Waveform Requirements 4.5.2 Performing group 2 test cases 1. Start the test as described in Chapter 4.1, "Starting C-PHY compliance tests", on page 17. 2. Select the test case group: "HS-TX Signaling Requirements (Group 2)". User Manual 1179.6472.02 ─...
  • Page 47 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - continuous measurements 3. Set "DUT" > "Data type" = "Continuous Mode" 4. Set the "Properties" for the measurement: a) Select, if you are using a "Single-Ended Probes" or "SMA Cables". b) Set the channel skew for VA, VB and VC.

  • Page 48: Measurements

    ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - continuous measurements 4.5.3 Measurements 4.5.3.1 1.2.10 HS-TX Static common-point voltages (V CPTX This test case applies to both CPHY versions 1.2 and 2.1. The test case can be run on both "Normal HS"...
  • Page 49 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - continuous measurements User Manual 1179.6472.02 ─ 01...
  • Page 50 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - continuous measurements 4.5.3.2 1.2.11 HS-TX Static common-point voltage mismatch (ΔV CPTX(HS) This test case applies to both CPHY versions 1.2 and 2.1. The test case can be run for "Normal HS"...
  • Page 51 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - continuous measurements 4.5.3.4 1.2.13 HS-TX dynamic common-point variations above 450 MHz (ΔV CPTX(HF) This test case applies to both CPHY versions 1.2 and 2.1. The test case can be run for "Normal HS"...
  • Page 52 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - continuous measurements 4.5.3.5 1.2.14 HS-TX rise time (t This test case applies to CPHY version 1.2. The test case can be run for "Normal HS" mode. The purpose of this test is to verify that the Rise Time (t ) of the DUT HS transmitter is within the conformance limits.
  • Page 53 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - continuous measurements 4.5.3.6 1.2.15 HS-TX fall time (t This test case applies to CPHY version 1.2. The test case can be run for "Normal HS" mode. The purpose of this test is to verify that the Fall Time (t ) of the DUT HS transmitter is within the conformance limits.
  • Page 54 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements (group 2) - continuous measurements 4.5.3.7 1.2.19 HS-TX clock instantaneous UI (UI INST This test case applies to both CPHY versions 1.2 and 2.1. The test case can be run for "Normal HS"...

  • Page 55: Hs-Tx Signaling Requirements For Eye Measurements (Group 2)

    ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements for eye measurements (group 2) Measurements A double-pole (second-order) Butterworth lowpass filter with a - 3 dB cutoff frequency of 2.0 MHz is used to filter the UI data to remove the high frequency noise/ error com- ponents.
  • Page 56 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements for eye measurements (group 2) 4.6.2 Performing group 2 test cases 1. Start the test as described in Chapter 4.1, "Starting C-PHY compliance tests", on page 17. 2. Select the test case group: "HS-TX Signaling Requirements for Eye Measurements (Group 2)".
  • Page 57 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements for eye measurements (group 2) d) Enable and set a value for "HS Symbol Rate" if you know the value. Otherwise, R&S RTP will estimates a symbol rate. e) Select the "Data Lane" you want to measure. Set the "Eye Measurement Time".
  • Page 58 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements for eye measurements (group 2) ● for the Weak 1 is greater than 90 mV. OD_CA(MEAN) ● for the Weak 0 is less than -90 mV. OD_CA(MEAN) ● for the Strong 0 is greater than -300 mV. OD_CA(MEAN) For all Lanes (Low voltage, LVHS) verify that: ●...
  • Page 59 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements for eye measurements (group 2) 4.6.3.2 1.2.8 HS-TX differential voltage mismatch (ΔV This test case applies to both CPHY versions 1.2 and 2.1. The test case can be run for "Normal HS" or "LVHS" mode. The purpose of this test is to verify that the Differential Voltage Mismatch (ΔV ) of the DUT HS transmitter is within the conformance limits.
  • Page 60 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements for eye measurements (group 2) Measurements For all lanes verify that the absolute value of ΔV is less than 17 mV. 4.6.3.3 1.2.9 HS-TX single-ended output high voltages (V ), V ), V OHHS OHHS...
  • Page 61 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements for eye measurements (group 2) 4.6.3.4 1.2.21 HS-TX eye diagram This test case applies to both CPHY versions 1.2 and 2.1. The test case can be run for "Normal HS" mode. The purpose of this test is to verify that the DUT’s HS-TX meets the requirements of the Transmitter Eye Diagram specification.
  • Page 62 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements for eye measurements (group 2) For all three differential waveforms and for all Lanes verify that the DUT has no mask hits. One incursion into the prorated mask is allowed, if a prorated masks is used. More than one incursion into the prorated mask is rated as fail.
  • Page 63 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements for eye measurements (group 2) User Manual 1179.6472.02 ─ 01...
  • Page 64 ® C-PHY compliance tests R&S RTP-K28 HS-TX signaling requirements for eye measurements (group 2) User Manual 1179.6472.02 ─ 01...

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