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PL360
PL360 Physical Calibration
Description
The PL360 is a programmable modem for narrow-band Power Line Communication (PLC), able to run
any PLC protocol in the frequency band below 500 kHz.
This device has been designed to comply with FCC, ARIB, KN60 and CENELEC EN50065 regulations
matching requirements of Internet of Things and Smart Energy applications. It supports state-of-the-art
narrow-band PLC standards such as ITU G.9903 (G3-PLC), ITU G.9904 (PRIME) as well as any other
narrow-band PLC protocols, at the same time being a future-proof platform able to support the evolution
of these standards.
The PL360 has been conceived to be driven by external Microchip host devices, thus providing an
additional level of flexibility on the host side. The Microchip host device loads the proper PLC-protocol
firmware before modem operation and controls the PL360 modem.
Implementation of firmware protocols over PL360 requires some values be calculated by calibration;
therefore, calibration process is essential in order to get the optimal PLC signal transmission behavior in
accordance with customer specifications.
User Guide
DS50002818A-page 1
©
2018 Microchip Technology Inc.
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Summary of Contents for Microchip Technology PL360
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Page 1: Description
PLC protocols, at the same time being a future-proof platform able to support the evolution of these standards. The PL360 has been conceived to be driven by external Microchip host devices, thus providing an additional level of flexibility on the host side. The Microchip host device loads the proper PLC-protocol firmware before modem operation and controls the PL360 modem. -
Page 2: Table Of Contents
The Microchip Web Site....................17 Customer Change Notification Service................17 Customer Support......................17 Microchip Devices Code Protection Feature..............17 Legal Notice........................18 Trademarks........................18 Quality Management System Certified by DNV.............19 Worldwide Sales and Service..................20 User Guide DS50002818A-page 2 © 2018 Microchip Technology Inc. -
Page 3: Overview
• Compensate nonlinearities of the coupling design, related to components tolerances and PCB layout To help in this calibration process of the PL360 PHY layer, Microchip provides the PHY Calibration Tool, ® an open source application developed with Python The Microchip G3 and PRIME stack implementations include default PHY layer configuration values optimized for the Evaluation Kits. -
Page 4: Physical Layer Capabilities
Let’s suppose we have set a signal injection objective of 110 dBuV for both HI and VLO modes. The following figures show the response of forced modes in an impedance range from 0 to 50Ω. User Guide DS50002818A-page 4 © 2018 Microchip Technology Inc. -
Page 5: Impedance Detection
The following figure shows the response in AUTO_STATE_VAR_GAIN (1) operation mode, where the system updates its response depending on the impedance detected in reception and following signal level, compared to the fixed modes: User Guide DS50002818A-page 5 © 2018 Microchip Technology Inc. - Page 6 As shown in the figure, the Auto response has been obtained sweeping from high to low impedance, this is why the switch is done near the lower value of the hysteresis window (some point between 10 and User Guide DS50002818A-page 6 © 2018 Microchip Technology Inc.
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Page 7: Equalization
The following figure shows an example of equalization in the G3 Cenelec-A band: The figure shows how the ripple is reduced after equalization, keeping the same signal average in band (overlapped curves). User Guide DS50002818A-page 7 © 2018 Microchip Technology Inc. -
Page 8: How To Get Calibration Values
This application works over phy_tester_tool firmware, so this project example must be running on the host microcontroller of PL360 board. Along the test process, the PLC signal may be connected to different impedance loads; therefore, it is strongly recommended to uncouple the PLC signal as far as possible from the mains power supply of the... - Page 9 GAIN_C: Present Gain Value: a valid value between the maximum and minimum set on calibration • RMS_C: RMS Power Calculated • RMS_C_C: RMS Power Calculated Corrected used for threshold comparing in order to change the TX mode Figure 3-3. Firmware Transmission Path Implementation User Guide DS50002818A-page 9 © 2018 Microchip Technology Inc.
- Page 10 - Insert maximum ripple required. - Preview preliminary correction. • Equalization loss is automatically compensated. POWER MEASURE GAIN Power Adjust GAIN INI SCRIPT Calc MAX_ _VALUES SCRIPT Calc THRESHOLD VALUES REPORT User Guide DS50002818A-page 10 © 2018 Microchip Technology Inc.
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Page 11: How To Use Calibration Values
The PHY Calibration Tool generates an output configuration file (Figure 4-1) which provides the required information to be included on G3 and PRIME projects for PL360 in order to take in account the customer calibration. Figure 4-1. Configuration File Report G3 Projects The PHY Calibration Tool generates a report file (“atpl360_coup_cfg_G3_<BAND>.h“... -
Page 12: Prime Projects
TH1_HI_TABLE Not in use TH2_HI_TABLE static const uint32_t spul_th_hi TH1_VLO_TABLE Not in use TH2_VLO_TABLE static const uint32_t spul_th_vlo PREDIST_COEF_HI_TABLE static const uint16_t spus_equ_hi_BAND PREDIST_COEF_VLO_TABLE static const uint16_t spus_equ_vlo_BAND User Guide DS50002818A-page 12 © 2018 Microchip Technology Inc. - Page 13 DACC_CFG_TABLE static const uint32_t spul_dacc_cfg_BAND Depending on the project, correspondence will be located on different files: • phy_tester_tool: thirdparty\prime_ng\phy\atpl360\apps\phy_tester_tool\phy_tester_tool.c • apps_1_4_prime_base_modem: thirdparty\prime_ng\pal\atpl360_prime\source\pal.c Figure 4-3. Correspondence Location on apps_1_4_prime_base_modem Project User Guide DS50002818A-page 13 © 2018 Microchip Technology Inc.
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Page 14: Appendix A - Setup Description
Appendix A - Setup Description This appendix shows the requirements of the setup in order to perform the physical calibration of a device using a PL360. If the DUT uses a non-isolated coupling, the ground of the control tool and the ground of the instrumentation must be properly isolated from the ground of the LISN. -
Page 15: Appendix B - Requirements For Phycalibrationtool.py
Microchip plc_tools_common-2.1.3 Python Library • Microchip plc_tools_phy_tester_public-2.0.1 Python Library • Microchip plc_tools_utils-2.0.3 Python Library Attention: In order to install a Python 3 library as xlswriter, you must run "python pip install xlswriter". User Guide DS50002818A-page 15 © 2018 Microchip Technology Inc. -
Page 16: Revision History
PL360 Revision History Revision History Rev A - 10/2018 Document Initial document release. User Guide DS50002818A-page 16 © 2018 Microchip Technology Inc. -
Page 17: The Microchip Web Site
Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. User Guide DS50002818A-page 17 © 2018 Microchip Technology Inc. -
Page 18: Legal Notice
SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries. GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries. -
Page 19: Quality Management System Certified By Dnv
PL360 © 2018, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. ISBN: 978-1-5224-3695-9 Quality Management System Certified by DNV ISO/TS 16949 Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California ®... -
Page 20: Worldwide Sales And Service
New York, NY Sweden - Stockholm Tel: 631-435-6000 Tel: 46-8-5090-4654 San Jose, CA UK - Wokingham Tel: 408-735-9110 Tel: 44-118-921-5800 Tel: 408-436-4270 Fax: 44-118-921-5820 Canada - Toronto Tel: 905-695-1980 Fax: 905-695-2078 User Guide DS50002818A-page 20 © 2018 Microchip Technology Inc.
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