RADIO TEST - REPORT
FCC Compliance Test Report for
Product name: NEO S Controller
Model name: CK24NS
FCC ID: 2BAXLCK24NS
Test Report Number: EFGX24010146-IE-05-E05
Tested by: EUROFINS ELECTRICAL TESTING SERVICE (SHENZHEN) CO., LTD.
1 General Information
1.1 Notes
The results of this test report relate exclusively to the item tested as specified in chapter "Description of test item" and are not transferable to any other test items. Eurofins Electrical Testing Service (Shenzhen) Co., Ltd. is not responsible for any generalisations and conclusions drawn from this report. Any modification of the test item can lead to invalidity of test results and this test report may therefore be not applicable to the modified test item. The test report may only be reproduced or published in full. Reproducing or publishing extracts of the report requires the prior written approval of the Eurofins Electrical Testing Service (Shenzhen) Co., Ltd. This document is subject to the General Terms and Conditions and the Testing and Certification System of Eurofins Electrical Testing Service (Shenzhen) Co., Ltd., available on request or accessible at www.eurofins.com.
Operator: Bruce Zheng / Project Engineer
Technical responsibility for area of testing: Albert Xu / Lab Manager
Test Report No.: EFGX24010146-IE-05-E05
Eurofins Electrical Testing Service (Shenzhen) Co., Ltd.
1st Floor, Building 2, Chungu, Meisheng Huigu Science and Technology Park, No. 83 Dabao Road, Bao'an District, Shenzhen. P.R.China.
Telephone: +86-755-82911867, Fax: +86-755-82910749
1.2 Testing laboratory
Eurofins Electrical Testing Service (Shenzhen) Co., Ltd.
1st Floor, Building 2, Chungu, Meisheng Huigu Science and Technology Park, No. 83 Dabao Road, Bao'an District, Shenzhen. P.R.China.
Telephone: +86-755-82911867
Fax: +86-755-82910749
The Laboratory has passed the Accreditation by the American Association for Laboratory Accrediation (A2LA). The Accreditation number is 5376.01. The Laboratory has been listed by industry Canada to perform electromagnetic emission measurements. The CAB identifier is CN0088.
1.3 Details of applicant
| Name | Freemode Go LLC dba CRKD |
| Address | 3142 Constitution drive, Livermore, California, United States |
| Telephone | +1 925 344 4045 |
| Fax | ./. |
1.4 Details of manufacturer
| Name | Freemode Go LLC dba CRKD |
| Address | 3142 Constitution drive, Livermore, California, United States |
| Telephone | +1 925 344 4045 |
| Fax | ./. |
1.5 Application details
| Date of receipt of application | 2024-01-11 |
| Date of receipt of test item | 2024-01-11 |
| Date of test | 2024-01-11 to 2024-01-25 |
| Date of issue | 2024-02-26 |
1.6 Test item
| Product type | NEO S Controller |
| Test Model | CK24NS |
| Sample ID | 231208-10-001 |
| Model name | CK24NS |
| Brand name | CRKD |
| Serial number | ./. |
| Hardware Version | V2.3 |
| Software / Firmware Version | VE8 |
| Ratings | DC 3.7V battery |
| Test voltage | DC 3.7V |
Radio Technical data
| Frequency range | 2402MHz – 2480MHz |
| Radio Tech. | Bluetooth Low Energy |
| Frequency channel | 40 Channels |
| Modulation | GFSK |
| Antenna type | PCB antenna |
| Maximum antenna gain | 2.499 dBi |
| Additional information | ./. |
The above sample(s) and sample information was/were submitted and identified on behalf of the applicant. Eurofins assures objectivity and impartiality of the test, and fulfills the obligation of confidentiality for applicant's commercial information and technical documents.
1.7 Test standards
| FCC Part 15 Subpart C | Test Standards PART 15 - RADIO FREQUENCY DEVICES Subpart C - Intentional Radiators |
Test Method
- ANSI C63.4-2014, American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz.
- ANSI C63.10-2013, American National Standard for Testing Unlicensed Wireless Devices.
- KDB558074 D01 15.247 Meas Guidance v05r02
2 Technical test
2.1 Summary of test results
No deviations from the technical specification(s) were ascertained in the course of the tests performed.
2.2 Test environment
| Environment Parameter | Temperature | Relative Humidity |
| Ac line conducted 101.2kPa | 23.7 °C | 61.3% |
| RF conducted 101.2kPa | 24.7 °C | 43.1% |
| Radiated 101.2kPa | 24.3 °C | 51.6% |
2.3 Measurement uncertainty
The uncertainty is calculated using the methods suggested in the "Guide to the Expression of Uncertainty in Measurement" (GUM) published by ISO.
| Test Items | System Measurement Uncertainty | Extended Uncertainty |
|---|---|---|
| Uncertainty in conducted measurements | 1.96dB | |
| Uncertainty for Conducted RF test | RF Power Conducted: 1.16dB Frequency test involved: 1.05×10-7 or 1% | |
| Uncertainty for Radiated Spurious Emission 25MHz-3000MHz | Horizontal: 4.46dB; Vertical: 4.54dB; | |
| Uncertainty for Radiated Spurious Emission 3000MHz-18000MHz | Horizontal: 4.42dB; Vertical: 4.41dB; | |
| Uncertainty for Radiated Spurious Emission 18000MHz-40000MHz | Horizontal: 4.63dB; Vertical: 4.62dB; |
2.4 Test mode
40 channels are provided for BT-LE-1M/2M:
| CHANNEL | FREQ. (MHZ) | CHAN. NEL | FREQ. (MHZ) | CHAN. NEL | FREQ. (MHZ) | CHAN. NEL | FREQ. (MHZ) |
|---|---|---|---|---|---|---|---|
| 0 | 2402 | 10 | 2422 | 20 | 2442 | 30 | 2462 |
| 1 | 2404 | 11 | 2424 | 21 | 2444 | 31 | 2464 |
| 2 | 2406 | 12 | 2426 | 22 | 2446 | 32 | 2466 |
| 3 | 2408 | 13 | 2428 | 23 | 2448 | 33 | 2468 |
| 4 | 2410 | 14 | 2430 | 24 | 2450 | 34 | 2470 |
| 5 | 2412 | 15 | 2432 | 25 | 2452 | 35 | 2472 |
| 6 | 2414 | 16 | 2434 | 26 | 2454 | 36 | 2474 |
| 7 | 2416 | 17 | 2436 | 27 | 2456 | 37 | 2476 |
| 8 | 2418 | 18 | 2438 | 28 | 2458 | 38 | 2478 |
| 9 | 2420 | 19 | 2440 | 29 | 2460 | 39 | 2480 |
The EUT was set at continuously transmitting mode during the test. The Lowest Channel 0, Middle 19 and Highest 39 were selected for test in the report.
2.5 Test equipment utilized
A comprehensive list of test equipment utilized, including Equipment ID, Name, Model No., and Calibration Due Date, is provided in the original document.
2.6 Auxiliary equipment used during test
| DESCRIPTION | MANUFACTURER | MODEL NO. | S/N |
|---|---|---|---|
| Laptop | LENOVO | TP00096A | PF-1QH0LV |
2.7 Test software information
| Test Software&Version | Mode | Power setting | Modulation Type |
|---|---|---|---|
| FCC assist | BLE_1M | CH0: DEF, CH19: DEF, CH39: DEF | GFSK |
| BLE_2M | CH1: DEF, CH19: DEF, CH38: DEF | GFSK |
2.8 Test setup
AC line conducted: The setup is within a shielded room, featuring the EUT placed on a table, connected to a Line Impedance Stabilization Network (LISN) which is then connected to a receiver. A power input is also indicated.
RF Conducted tests: The EUT (Bluetooth Component) is connected via jumper cables to a power splitter. From the splitter, RF cables lead to an attenuator and then to a measurement instrument. A Bluetooth System Simulator is also part of the setup.
Radiated tests below 30MHz: The EUT is positioned on a turntable 0.8m above a ground plane. An antenna is placed 3m away, mounted on a variable-height tower. A spectrum analyzer/receiver is connected to the antenna.
Radiated tests below 1GHz: Similar to the setup for tests below 30MHz, with the addition of auxiliary equipment (AE) connected via a signal wire and ferrite clamp.
Radiated tests above 1GHz: This setup is similar to the below 1GHz configuration, with the antenna height specified as MIN 1m and MAX 4m.
3 Technical Requirement
This section details the technical requirements and test methods applied.
3.1 Conducted emission AC power port
Test Method: Referencing ANSI C63.10-2013, subclause 6.2. The EUT is placed on a non-conducting table 40 cm from the vertical ground plane and 80 cm above the horizontal ground plane. Resolution bandwidth of 9 kHz is used. Peak detection is employed unless otherwise specified.
Limit:
| Frequency (MHz) | QP Limit (dBμV) | AV Limit (dBμV) |
|---|---|---|
| 0.150-0.500 | 66-56* | 56-46* |
| 0.500-5 | 56 | 46 |
| 5-30 | 60 | 50 |
3.2 Duty cycle
Test Method: Referencing ANSI C63.10-2013, subclause 11.6. Measurements are performed using a diode detector and oscilloscope, or zero-span mode on a spectrum analyzer/EMI receiver.
Limit: None; for reporting purposes only.
3.3 6dB bandwidth
Test Method: Referencing ANSI C63.10-2013, subclause 11.8. Procedures involve setting RBW to 100 kHz and VBW ≥ 3 × RBW, with peak detector and max hold mode. An automatic bandwidth measurement capability can also be used.
Limit: The minimum 6 dB bandwidth shall be at least 500 kHz.
3.4 99% Occupied Bandwidth
Test Method: Referencing ANSI C63.10-2013, subclause 6.9.3. This measures the frequency bandwidth containing 99% of the total mean power of the emission. Video averaging is not permitted; peak detection and max hold mode are preferred.
Limit: None; for reporting purposes only.
3.6 Conducted Peak output power
Test Method: Referencing ANSI C63.10-2013, subclause 11.9.1.1. This procedure is used when the resolution bandwidth is greater than the DTS bandwidth, employing peak detection and max hold.
Limits: For systems using digital modulation in the 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz bands: 1 Watt.
3.7 Power spectral density
Test Method: Referencing ANSI C63.10-2013, subclause 11.10.2. This method is used to determine compliance, with RBW between 3 kHz and 100 kHz, and VBW ≥ 3 × RBW, using peak detector and max hold.
Limit: For digitally modulated systems, the power spectral density shall not be greater than 8 dBm in any 3 kHz band.
3.8 Conducted Spurious Emissions
Test Method: Referencing ANSI C63.10-2013, subclauses 11.11/11.12. Procedures involve establishing a reference level and then measuring emission levels. RBW is typically 100 kHz, with VBW ≥ 3 × RBW.
Limit: Unwanted emissions outside the authorized frequency band must be attenuated by at least 20 dB relative to the peak measurement.
3.9 Band edge
Test Method: Referencing ANSI C63.10-2013, subclause 11.13.3. This covers peak detection for emissions near the band edge and trace averaging for continuous transmission.
3.10 Spurious radiated emissions for transmitter
Test Method: Referencing ANSI C63.10-2013, subclauses 11.11/11.12. The test involves placing the EUT on a turntable at specified heights and distances from a receiving antenna, with the antenna height varied to find maximum field strength. Spectrum analyzer settings are defined for different frequency ranges (Above 1GHz, Below 1GHz, Below 30MHz).
Limits: Defined by FCC §15.205 and §15.209, and RSS-GEN, Section 8.9 and 8.10, specifying field strength limits at various frequency ranges.
2.9 Test results
The test results indicate compliance with the technical requirements. A summary table shows 'Pass' verdicts for various conditions such as Conducted emission AC power port, Conducted output power, Power spectral density, 6dB bandwidth, 99% Occupied Bandwidth, Conducted Spurious Emissions, Band edge, and Spurious radiated emissions.
4 Test Setup Photos
Refer to "EFGX24010146-IE-05-E04_Setup_Photos.pdf"
5 External Photo
Refer to "EFGX24010146-IE-05-E04_External_Photos.pdf"
6 Internal Photos
Refer to "EFGX24010146-IE-05-E04_Internal_Photos.pdf"
7 Appendix
Refer to "EFGX24010146-IE-05-E05_appendix.pdf"
-End of report-
