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Radio Frequency Calibration Engineer Job Opening In Bengaluru – Now Hiring L&T Semiconductor Technologies


Job description

We are seeking a skilled and experienced RF Calibration Engineer with hands-on expertise in Qualcomm cellular platform to lead and execute RF calibration activities including RFC card generation, QCN/XQCN handling, and RF tuning.

The candidate will play a critical role in ensuring optimal RF performance across LTE, GPS, Wi-Fi, and Bluetooth subsystems.


Areas Of Responsibility

  • Perform RF calibration for cellular platforms based on Qualcomm SoCs (e.G., QCM, QCS, SA2150, SA415M, SDX series, QCX series)
  • Generate and update RFC (Radio Frequency Configuration) cards for factory and production use
  • Handle QCN/XQCN backup, editing, and restoration for RF parameter tuning
  • Conduct calibration procedures using Qualcomm toolchain: QPST, QXDM, QDART, QCAT, and QMSL
  • Analyze and debug RF logs, NV configurations, and RF signal performance
  • Coordinate with hardware and modem teams to optimize antenna and RF path
  • Support EFS/NV management, RF provisioning, and board-level bring-up
  • Automate repetitive tasks using Python/Perl scripts for efficiency in calibration and flashing
  • Maintain documentation and traceability for RF performance and test results

Experience and Qualification

Experience: 5 to 10 yrs

  • Solid hands-on experience with Qualcomm RF calibration tools and procedures
  • Experience with multiple Qualcomm chipsets (e.G., QCM2290, QCS2290, QCX216, SA415M, SDX55, etc.)
  • Deep understanding of LTE/4G/5G, GNSS, Bluetooth, and Wi-Fi RF subsystems
  • Familiarity with NV item editing, eFuse programming, and RF tuning principles
  • Strong background in wireless testing, calibration lab tools, and scripting automation
  • Bachelor's or Master's degree in Electronics, Telecommunications, or relevant discipline

Qualifications:

  • Prior experience with mass production RF calibration and automation
  • Exposure to carrier certification (PTCRB, GCF, operator-specific requirements)
  • Familiarity with SAR/TRP/TIS testing, antenna design, and tuning practices
  • Knowledge of eSIM/eUICC, security provisioning, and factory test flows
  • Experience with Qualcomm’s Diag protocol, QCN tools, and RF trace analysis

Technical And Behavioural Skills

Technical Skills :

Qualcomm Tools & Platforms:

  • QXDM – Log capture, RF trace analysis, event monitoring
  • QPST/QFIL – EFS access, QCN flashing, QPST server tools
  • QCAT – Log post-processing and NV item analysis
  • QDART – RF calibration and automation interface
  • QMSL (Qualcomm Modem Software Library) – Used for scripting RF calibration routines
  • RFNV Tool / QCN Manager / NV Manager – NV editing and configuration
  • RF Card Tool / RFC Generator – RFC card creation, editing, and validation
  • eFUSE Tools – eFUSE blowing for platform security and production configuration

Calibration & Testing:

  • RF Calibration – LTE/4G/5G, GNSS (GPS/GLONASS), Bluetooth, Wi-Fi
  • QCN/XQCN Handling – Backup, edit, restore NV configurations
  • EFS Management – File system access for provisioning and NV injection
  • RF Tuning & Optimization – Gain table tuning, PA bias, switch path config
  • Production Calibration Flow – Factory-line calibration using automation scripts
  • Carrier Certification Support – TRP/TIS/SAR data generation, PTCRB, GCF

Modem & Protocol Stack Knowledge:

  • LTE Bands, Band combinations, Carrier Aggregation
  • Diag protocol & diagnostic message decoding
  • Call flow understanding: Attach, RRC, PDP contexts
  • NV item structure and interdependencies

Behavioural Skills:

  • Strong communication and teamwork skills.
  • Ability to adapt to a fast-paced and dynamic business environment.
  • Detail-oriented with a focus on quality and accuracy.
  • Proactive and self-motivated with a results-oriented mindset.

Required Skill Profession

Engineers


  • Job Details

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Unlock Your Radio Frequency Potential: Insight & Career Growth Guide


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The Work Culture

An organization's rules and standards set how people should be treated in the office and how different situations should be handled. The work culture at L&T Semiconductor Technologies adheres to the cultural norms as outlined by Expertini.

The fundamental ethical values are:

1. Independence

2. Loyalty

3. Impartiapty

4. Integrity

5. Accountabipty

6. Respect for human rights

7. Obeying India laws and regulations

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The average salary range for a varies, but the pay scale is rated "Standard" in Bengaluru. Salary levels may vary depending on your industry, experience, and skills. It's essential to research and negotiate effectively. We advise reading the full job specification before proceeding with the application to understand the salary package.

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Interview Tips for Radio Frequency Calibration Engineer Job Success

L&T Semiconductor Technologies interview tips for Radio Frequency Calibration Engineer

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Before the Interview:

Research: Learn about the L&T Semiconductor Technologies's mission, values, products, and the specific job requirements and get further information about

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Practice: Prepare answers to common interview questions and rehearse using the STAR method (Situation, Task, Action, Result) to showcase your skills and experiences.

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