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Larsen & Toubro (L&T)
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RF_Calibraition_Engineer

RF_Calibraition_Engineer

Larsen & Toubro (L&T)

4 - 7 years

6 - 9 Lacs

bengaluru

Posted:1 day ago| Platform:

Apply

Skills Required

wireless automation bluetooth rrc rf protocol stack perl monitoring testing python

Work Mode

Work from Office

Job Type

Full Time

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:

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

Bachelors or Masters 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

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