Job Description

RF_Calibraition_EngineerLNT/-/1459575


LTST-L&T Semiconductor Technologies LimitedBengaluru
Posted On
31 Aug 2025
End Date
27 Feb 2026
Required Experience
4 - 7 Years

Skills
Knowledge & Posting Location


R&D


Minimum Qualification


BACHELOR OF ENGINEERING (BE)




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:

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.

Qualifiers for the Role / Necessary Experience and Skills Required for the Role

* Bachelor's or master's degree in Electronics/Electrical/Communications Engineering