Introduction: The Importance of Proper RF Sample Preparation
Accurate radio frequency (RF) testing begins with the right sample setup. Whether for compliance under FCC, ISED, or European standards, properly configured test samples ensure your wireless device performs as expected and avoids costly retests.
MiCOM Labs provides state-of-the-art RF testing, including conducted (antenna port) and radiated (over-the-air) evaluations. To make the process efficient, each device must arrive fully prepared and operable in all test modes.
1. RF Test Configurations
RF testing typically involves two primary configurations:
- Conducted testing, where the device’s antenna port connects directly to test equipment,
- Radiated testing, where the EUT is placed inside an anechoic chamber to measure emissions over the air.
| Test Type | Sample Requirement | Description / Example |
| Conducted (Antenna Port) | One sample with a 50-ohm connector (preferably SMA) | Modify all antenna ports if multiple exist; ensure proper impedance matching. |
| Radiated (Over-the-Air) | One unmodified sample (normal production configuration) | Used for OTA measurements and functional performance testing. |
| Transmitter Mode | Device must transmit continuously with modulation | Maintain ≥ 98% duty cycle if possible; fixed frequency preferred. |
| Receiver Mode | Provide a way to monitor performance (BER, throughput, or block errors) | Often requires a companion device and test software to measure sensitivity. |
| Hopping Mode Devices | Provide pseudo-random hopping sequence configuration | Ensure hopping control can be demonstrated for testing; provide a fixed hop list or channel control for repeatability. |
| Operation Modes | Prepare all supported modulations, bandwidths, and channels | Each configuration must be accessible for testing, including MIMO and diversity configurations. |
2. Preparing Transmitter Samples
Transmitter testing evaluates power, modulation characteristics, bandwidth, frequency stability, and spurious emissions. MiCOM Labs requires the ability to “park” the transmitter on a fixed frequency and maintain a continuous modulated signal.
Key Guidelines:
- Configure the highest possible duty cycle (≥ 98% recommended by FCC).
- Provide environmental testing ranges for temperature and voltage if applicable (per FCC §2.1055).
- Include instructions for multiple modulations, bandwidths, and any simultaneous radio operation.
- Include transmit enable commands, control software, and chipset vendor utilities.
- Ensure all RF ports are accessible for harmonic and spurious emissions testing.
- Provide a labeled sample (serial number, firmware version) and optional photographic documentation.
3. Preparing Receiver Samples
Receiver testing determines how well the device can detect and process weak signals under controlled conditions.
| Receiver Test Requirement | Details / Notes |
| Performance Monitoring | Must track Bit/Block Error Rate (BER/BLER) or throughput. |
| Communication Link | A “companion device” may be required to communicate with the EUT. |
| Test Software | Provide tools to generate and monitor receiver metrics. |
| Technology Variants | Specify how to test each mode (e.g., Wi-Fi, Bluetooth, LTE, etc.), including co-located radios and MIMO setups. |
4. Cellular Technologies
MiCOM Labs provides base station emulators to replicate live network conditions for both transmitter and receiver testing.
| Cellular Device Requirement | Description / Notes |
| SIM Slot Access | Must be available to insert test SIMs. |
| Emulator Compatibility | Supports 2G, 3G, 4G, 5G. |
| Mode Configuration | Provide details for forced band/channel selection and connection setup. |
| Power Source | Specify use of external AC/DC adapters, battery simulators, or test jigs for repeatable results. |
Include chipset vendor compliance tools (e.g., Qualcomm, MediaTek, Nordic) and instructions with the test documentation.
5. Critical Documentation and Instructions
Clear, complete documentation ensures testing starts smoothly:
- Step-by-step device operation guide
- Configuration files or scripts to initialize each mode
- List of all accessories and test cables
- Required software or drivers
- Remote access credentials (TeamViewer, Remote Desktop)
- Sample labeling (serial number, firmware version)
- Optional photographs of device and setup for regulatory submissions
6. Common Mistakes to Avoid
- Sending samples without RF connectors or test mode enabled
- Failing to provide transmit control instructions
- Missing companion devices or test utilities
- Omitting SIM access for cellular units
- Not documenting hopping sequence or multiple-radio operation
- Ignoring environmental testing ranges (temperature, voltage)
- Not labeling samples or providing photographic records
Avoiding these pitfalls reduces schedule delays and extra handling charges.
7. Partner with MiCOM Labs for Reliable Wireless Testing
MiCOM Labs combines technical expertise and advanced testing capabilities to ensure your product meets worldwide RF regulatory requirements with confidence. Whether your device supports Wi-Fi, Bluetooth, Zigbee, LTE, or 5G, our team helps validate your sample preparation process.
Why Choose MiCOM Labs:
- Global lab network for FCC, ISED, RED, MIC Japan, and UKCA compliance
- Streamlined testing workflow to reduce turnaround time
- Technical guidance for MIMO, diversity, co-located radios, and environmental conditions
- Detailed documentation and remote verification support
Ready for wireless testing? Contact MiCOM Labs today: