Calibration Technician

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.

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