TEST REPORT
| Product | Seeed Studio XIAO ESP32C6 |
| Trade mark | Seeed Studio |
| Model/Type reference | XIAO-ESP32-C6 |
| Serial Number | N/A |
| Report Number | EED32Q80454002 |
| Date of Issue | Jun. 11, 2024 |
| Product Class | Item 19-2 of Article 2 Paragraph 1 |
| Test result | ✔️ PASS |
Prepared for:
Seeed Technology Co., Ltd
9F, G3 Building, TCL International E City, Zhongshanyuan Road, Nanshan District, Shenzhen, Guangdong Province, P.R.C, China
Prepared by:
Centre Testing International Group Co., Ltd
Hongwei Industrial Zone, Bao'an 70 District, Shenzhen, Guangdong, China
TEL: +86-755-3368 3668
FAX: +86-755-3368 3385
Compiled by:
Keven Tan, Aaron Ma
Reviewed by:
Frazer Li
Date: Jun. 11, 2024
1 Version
| Version No. | Date | Description |
| 00 | Jun. 11, 2024 | Original |
2 Test Summary
| Test | Test Requirement | Ordinance regulating radio equipment Limit | Result |
|---|---|---|---|
| Antenna Requirement | item 19-2 of Article 2 Paragraph 1 | Ordinance regulating radio equipment Chapter II Section 3 | N/A |
| Test frequency | item 19-2 of Article 2 Paragraph 1 | N/A | PASS |
| Frequency Error | item 19-2 of Article 2 Paragraph 1 | ±50 PPM or less | PASS |
| Occupied Bandwidth | item 19-2 of Article 2 Paragraph 1 | 26MHz or less | PASS |
| Spread-spectrum Bandwidth | item 19-2 of Article 2 Paragraph 1 | 500 kHz or more | PASS |
| Antenna Power | item 19-2 of Article 2 Paragraph 1 | 10mW/MHz or less Tolerance: +20%,-80% | PASS |
| Spurious Emission of Tx | item 19-2 of Article 2 Paragraph 1 | (1)Below 2458 MHz : 2.5μW (2)2458 to 2471 MHz : 25μW (3)2497 through 2510MHz : 25μW (4)Over 2510 MHz : 2.5µW | PASS |
| Interference prevention capability | item 19-2 of Article 2 Paragraph 1 | Ordinance regulating radio equipment Chapter I Section 5 | PASS |
| Carrier sense capability | item 19-2 of Article 2 Paragraph 1 | Notice 88 Appendix 44 | N/A |
| RF accessibility | item 19-2 of Article 2 Paragraph 1 | N/A | PASS |
| Spurious Emission of Rx | item 19-2 of Article 2 Paragraph 1 | (1) Below 1 GHz: 4nW (2) 1GHz or higher: 20nW | PASS |
Remark: Company Name and Address shown on Report, the sample(s) and sample information was/were provided by the applicant who should be responsible for the authenticity which CTI hasn't verified.
EUT: In this whole report EUT means Equipment Under Test.
Tx: In this whole report Tx (or tx) means the product in transmitting status.
Rx: In this whole report Rx (or rx) means the product in receiving status.
RF: In this whole report RF means Radiated Frequency.
DS: Direct spreading
FH: Frequency hopping
OFDM: Orthogonal frequency division multiplexing
NA: No requirements for 20M bandwidth
All antennas have been tested, only the worst data (Antenna1) have been recording in the report.
4 General Information
4.1 Client Information
| Applicant: | Seeed Technology Co., Ltd |
| Address of Applicant: | 9F, G3 Building, TCL International E City, Zhongshanyuan Road, Nanshan District, Shenzhen, Guangdong Province, P.R.C, China |
| Manufacturer: | Seeed Technology Co., Ltd |
| Address of Manufacturer: | 9F, G3 Building, TCL International E City, Zhongshanyuan Road, Nanshan District, Shenzhen, Guangdong Province, P.R.C, China |
| Factory: | Seeed Technology Co., Ltd |
| Address of Factory: | 9F, G3 Building, TCL International E City, Zhongshanyuan Road, Nanshan District, Shenzhen, Guangdong Province, P.R.C, China |
4.2 General Description of EUT
| Product Name: | Seeed Studio XIAO ESP32C6 |
| Model No.: | XIAO-ESP32-C6 |
| Test Model No.: | XIAO-ESP32-C6 |
| Trade Mark: | Seeed Studio |
| Operating Frequency: | Wi-Fi: IEEE 802.11b (HT20): 2484MHz |
| Conducted rate power: | 802.11b(channel 14): 1.8mW/MHz |
| Type of Modulation: | 802.11b: DSSS(CCK/QPSK/BPSK) |
| Transmit Data Rate: | 802.11b: 1M/2M/5.5M/11Mbps |
| Channel Separation: | 5 MHz |
| Antenna Type: | Antenna1: Ceramic chip antenna Antenna2: FPC antenna Antenna3: Rod antenna |
| Antenna gain: | Antenna1: 4.97dBi Antenna2: 1.23dBi Antenna3: 2.42dBi |
| Test Power Grade: | Default |
| Test Software of EUT: | EspRFTestTool_v3.6_Manual |
| Power Supply: | Adapter: DC 3.3V |
| Sample Received Date: | Apr. 10, 2024 |
| Sample tested Date: | Apr. 10, 2024 to Jun. 11, 2024 |
4.3 EUT Test Environment Recorded
| Temperature: | 22°C |
| Humidity: | 53% RH |
| Atmospheric Pressure: | 1010mbar |
4.4 Description of Support Units
The EUT has been tested with associated equipment below.
| Associated equipment name | Manufacture | model | S/N serial number | Supplied by | Certification |
|---|---|---|---|---|---|
| / | / | / | / | / | / |
4.5 Test Location
All tests were performed at:
Centre Testing International Group Co., Ltd.
Building C, Hongwei Industrial Park Block 70, Bao'an District, Shenzhen, China
Telephone: +86 (0) 755 3368 3668 Fax:+86 (0) 755 3368 3385
No tests were sub-contracted.
4.6 Measurement Uncertainty (95% confidence levels, k=2)
| No. | Item | Measurement Uncertainty |
|---|---|---|
| 1 | Frequency Error | 10 Hz |
| 2 | Occupied Bandwidth | 10 kHz |
| 3 | Antenna Power | 0.55dB |
| 4 | Spurious Emissions | 0.46dB(30MHz-1GHz) 0.55dB(1GHz-18GHz) |
| 5 | Carrier sense capability | 1.0dB |
| 6 | Temperature test | 0.64°C |
| 7 | Humidity test | 3.8% |
| 81 | DC and low frequency voltages test | 0.026% |
5 Equipment List
| Equipment | Manufacturer | Model | Serial No. | Cal. Date | Due date | Calibration body | Classification |
|---|---|---|---|---|---|---|---|
| Spectrum Analyzer | R&S | FSV40 | 101200 | 09-02-2020 | 09-01-2021 | LISAI | (c) |
| Spectrum Analyzer | R&S | FSP40 | 100416 | 04-29-2021 | 04-28-2022 | CTI | (c) |
| Temperature/ Humidity Indicator | biaozhi | GM1360 | EJ1611459 | 02-21-2021 | 02-20-2022 | CTIMT | (c) |
| Signal Generator | Keysight | E8257D | MY5340110 6 | 12-28-2020 | 12-27-2021 | CTIMT | (c) |
| Digital multimeter | FLUKE | 111 | 90240138 | 05-13-2020 | 05-12-2021 | CTIMT | (c) |
Remark:
- (a) Calibration conducted by the National Institute of Information and Communications Technology (NICT) in Japan (hereinafter referred to as "NICT") or a designated calibration agency under Article 102-18 paragraph (1) in JRL.
- (b) Correction conducted pursuant to the provisions of Article 135 or Article 144 of the Measurement Act (Act No. 51 of 1992).
- (c) Calibration conducted in countries except Japan, which shall be equivalent to the calibration conducted by the NICT or a designated calibration agency under Article 102-18 paragraph (1).
- (d) Calibration, etc. conducted by using measuring instruments and other equipment listed in the right column of appended table No. 3, which shall have been given any type of calibration, etc. listed above from (a) to(c).
Notice: Calibration duration for above equipment is 1 year.
6 Radio Technical Requirements Specification
Table 1: Radio Technical Requirements Specification for 2.4 GHz band low-power data communication system (Item 19-2 of Article 2 Paragraph 1)
| Items | Technical standard |
|---|---|
| Assigned frequency or designated frequency | 2471MHz-2497MHz |
| Communication method | One-way, Simplex, Duplex, Half-Duplex, Broadcast |
| Tolerance of frequency (×10⁻⁶) | ±50PPM |
| Tolerance of occupied bandwidth | 26MHz |
| Antenna power | 10mW/MHz or less Tolerance: +20%,-80% |
| Antenna gain | 2.14dBi or less When an E.R.P. is less than a limit, the shortage shall be compensated for by the gain of the transmitting antenna. |
| Tolerance of spurious emission intensity | (1) Below 2458 MHz : 2.5μW (2) 2458 to 2471 MHz : 25μW (3) 2497 through 2510MHz : 25μW (4) Over 2510 MHz : 2.5µW |
| Spreading bandwidth | 500kHz or more |
| Spreading rate of spectrum | For DS system;(Spreading bandwidth) / (Frequency corresponding to transmission rate) ≥ 10 |
| Limit of secondary radiated emissions | (1) Below 1 GHz: 4nW (2) 1 GHz or higher: 20nW |
| Interference prevention function | Shall have the function of automatic transmission and reception of identification sign. |
| Structure | Shall be of the structure that the RF and modulator sections excluding antenna cannot easily be opened. |
| Note | DS: Direct spread FH: Frequency hopping |
Note: The Technical Standards described here do not cover all of the regulated items.
6.1 Transmitter Requirements
6.1.1 EUT test voltage and Frequency
6.1.1.1 EUT test voltage
| Power Supply: | Adapter: DC 3.3V |
| Test voltage require: | Supply the rated voltage and the rated voltage ±10% to power supply. However, If the fluctuation of input voltage to the circuit of RF unit (except power supply) of test equipment is under ±1%, when input voltage from external power supply to the test equipment is fluctuated by ±10%: Conduct the test with the rated voltage only. |
RF circuit test points:
Description of Diagram: A schematic shows the ESP32-C6FH4 chip (U4) with its pins connected to various components including resistors (R13, R15, R14), capacitors (C5, C12, C20), and test points. It details connections for power (+3V3, GND), SDIO, GPIO, XTAL, USB, and antenna (ANT). Layout notes indicate controlling SDIO wiring length and placing R15 close to U4.
| Power Supply result: | The measurement result of the voltage fluctuation at RF circuit when DC 3.3V +/- 10%. | |
| Remark | DC Input | RF circuit |
| NV | 3.3V | DC 3.3V |
| LV | 3.333V | DC 3.3V |
| HV | 3.267V | DC 3.3V |
NT: Normal Temperature
NV: Normal Voltage
LV: Low Voltage
HV: High Voltage
6.1.1.2 Test frequency
Test frequencies: If the EUT can be set to 3 or more different (carrier) frequencies in 1 allocated band, testing shall be performed using the Lowest, Middle and the Highest frequency (L,M and H). If there are 2 or fewer frequencies, testing shall be performed with the available frequencies.
| Frequency range over which device operates | Number of frequencies | Location in the range of operation |
|---|---|---|
| 1 MHz or less | 1 | Middle |
| 1 to 10 MHz | 2 | 1 near top and 1 near bottom |
| More than 10 MHz | 3 | 1 near top, 1 near middle and 1 near bottom |
EUT channels and frequencies list:
| 802.11b | Channel | Frequency (MHz) |
|---|---|---|
| 14 | 2484 |
6.1.2 Antenna Requirement
Standard requirement: Applicable for equipment with an antenna terminal, including testing terminals) If an antenna connector is available, all relevant tests will be carried out conducted. If not, tests will be carried out in an anechoic room or with a suitable test-fixture.
EUT Antenna: Please see the interior photos
| Antenna1: | The antenna connector is a ceramic chip antenna and need not be replaced. The optimum gain of the antenna is 4.97dBi. |
| Antenna2: | The antenna connector is a FPC antenna and no consideration of replacement. The best case gain of the antenna is 1.23dBi. |
| Antenna3: | The antenna connector is a Rod antenna and no consideration of replacement. The best case gain of the antenna is 2.42dBi. |
Result: An antenna connector is available; all relevant tests will be carried out conducted.
6.1.3 Frequency Error
| Test Requirement: | Item 19-2 of Article 2 Paragraph 1 |
| Test Method: | MIC Notice No.88 Appendix No.44 |
| EUT Test Status: | Enter the unmodulation mode for the product. Test in Channel lowest, middle and highest, keep in continuously transmitting status. |
| Test Configuration: | EUT ➡️ Spectrum Analyzer |
| Test Conditions: | Frequency Counter or Spectrum Analyzer is used for measurement. |
| EUT conditions: | Modulation/Spread/Hopping off, CW Tx |
| Spectrum Analyzer conditions: | Frequency: Test Frequency Span 1MHz RBW 10kHz (Modulation ON), VBW 10kHz (Modulation ON), Sweep Time Auto Detector mode Positive peak Indication mode Max hold |
| Technical standard: | Tolerance of frequency: ±50×10⁻⁶ |
| Test result: | Refer to Appendix: 2.4G WIFI of Report No. EED32Q8045403 |
6.1.4 Occupied Bandwidth (99%)
| Test Requirement: | Item 19-2 of Article 2 Paragraph 1 |
| Test Method: | MIC Notice No.88 Appendix No.44 |
| EUT Test Status: | Pre-Scan has been conducted to determine the worst-case mode from all possible combinations between available modulations, data rates and antenna ports (if EUT with antenna diversity architecture). Following channel(s) was (were) selected for the final test as listed below. |
| Test Configuration: | EUT ➡️ Spectrum Analyzer |
| EUT conditions: | Modulation/Spread/Hopping on, PN9 Modulation Tx with standard coding test signal. For equipment using diffusion code, set to the test diffusion code and modulate. |
| Spectrum Analyzer conditions: | Frequency: Test Frequency Span 40MHz RBW 300 kHz VBW 300 kHz Sweep Time Auto Detector mode Positive peak Indication mode Max hold OBW 99% |
| Technical standard: | 26MHz or less |
| Test result: | Refer to Appendix: 2.4G WIFI of Report No. EED32Q8045403 |
6.1.5 Spread spectrum Bandwidth (90%)
| Test Requirement: | Item 19-2 of Article 2 Paragraph 1 |
| Test Method: | MIC Notice No.88 Appendix No.44 |
| EUT Test Status: | Pre-Scan has been conducted to determine the worst-case mode from all possible combinations between available modulations, data rates and antenna ports (if EUT with antenna diversity architecture).Following channel(s) was (were) selected for the final test as listed below. |
| Test Configuration: | EUT ➡️ Spectrum Analyzer |
| EUT conditions: | Modulation/Spread/Hopping on, PN9 Modulation Tx with standard coding test signal. For equipment using diffusion code, set to the test diffusion code and modulate. |
| Spectrum Analyzer conditions: | Frequency: Test Frequency Span 40MHz RBW 300kHz VBW 300kHz Sweep Time Auto Detector mode Positive peak Indication mode Max hold OBW 90% |
| Technical standard: | 500kHz or more |
| Test result: | Refer to Appendix: 2.4G WIFI of Report No. EED32Q8045403 |
6.1.6 Antenna Power
| Test Requirement: | Item 19-2 of Article 2 Paragraph 1 |
| Test Method: | MIC Notice No.88 Appendix No.44 |
| EUT Test Status: | Pre-Scan has been conducted to determine the worst-case mode from all possible combinations between available modulations, data rates and antenna ports (if EUT with antenna diversity architecture). Following channel(s) was (were) selected for the final test as listed below. |
| Test Configuration: | EUT ➡️ Spectrum Analyzer |
| EUT conditions: | Modulation/Spread/Hopping on, PN9 Modulation Tx with standard coding test signal. For equipment using diffusion code, set to the test diffusion code and modulate. |
| Spectrum Analyzer conditions(FHSS): | 1.Search for peak power frequency Frequency: Test Frequency Span 40 MHz RBW 1 MHz VBW 1 MHz Sweep Time Auto detector mode Positive peak Indication mode Max hold 2. Measurement of average antenna power Center frequency: Frequency of peak power found using Span: 0 Hz RBW: 1MHz VBW :3MHz Detector mode: Sample Sweep time: Minimum time required to make an accurate measurement. For burst type (intermittent) transmission, sweep time shall be greater than one burst interval. Sweep data points: 1001 or greater |
| Technical standard: | Antenna Power (1) 10mW or less (2)Tolerance: +20%, -80% |
| Test result: | Refer to Appendix: 2.4G WIFI of Report No. EED32Q8045403 |
6.1.7 Spurious Emissions of Tx
| Test Requirement: | Item 19-2 of Article 2 Paragraph 1 |
| Test Method: | MIC Notice No.88 Appendix No.44 |
| EUT Test Status: | Pre-Scan has been conducted to determine the worst-case mode from all possible combinations between available modulations, data rates and antenna ports (if EUT with antenna diversity architecture). Following channel(s) was (were) selected for the final test as listed below. |
| Test Configuration: | EUT ➡️ Spectrum Analyzer |
| EUT conditions: | Modulation/Spread/Hopping on, PN9 Modulation Tx with standard coding test signal. For equipment using diffusion code, set to the test diffusion code and modulate. |
| Measurement Procedure: | Step1 All spurious are measured from 30MHz to 12.5GHz by peak mode. Step2 IF the value measured by Step1 is 2dB or less, measure in average mode. |
| Spectrum Analyzer conditions(Step 1): | Frequency: 30MHz -12.5GHz RBW 100kHz (30 – 1GHz), 1000KHz (over 1GHz) VBW 300kHz (30 – 1GHz), 3000KHz (over 1GHz) Sweep Time Auto Detector mode Positive peak Indication mode Max hold |
| Spectrum Analyzer conditions(Step 2): | Frequency: Spurious Frequency Span 0Hz RBW 1MHz VBW 1MHz Sweep Time Auto Detector mode Sample Indication mode Max hold |
| Technical standard: | (1) Below 2458 MHz : 2.5μW (2) 2458 to 2471 MHz : 25μW (3) 2497 through 2510MHz : 25μW (4) Over 2510 MHz : 2.5μW |
| Test result: | Refer to Appendix: 2.4G WIFI of Report No. EED32Q8045403 |
6.1.8 Interference prevention function
1) Measurement system diagram
Description: A block diagram showing the interference prevention function test setup. It depicts a 'Test equipment' connected via an 'Attenuator' to a 'Demodulator'.
2) Condition of measuring instrument
Demodulator must be able to demodulate the transmitting signal emitted by test equipment and to indicate the identification code.
3) Condition of test equipment
The mode of normal use.
4) Measuring operation procedure
(1) When test equipment has the function to transmit identification code automatically:
A) Transmit the predetermined identification code from test equipment.
B) Confirm the transmitted identification code by demodulator.
Example timestamp: 55:13:06:07:29:77
5) Test result
The unit does meet the requirements (Good). Test result: ✔️ PASS.
6.1.9 RF accessibility
Standard requirement: Article 49-20, paragraph 1 (a)
The EUT shall be constructed in such a way that sensitive RF parts, (like modulation and oscillator parts) cannot be reached easily by the user. These parts shall be covered by soldered metal caps or glue or by other mechanical covers. If the covers are fixed with screws, these shall be not the common type(s) like a Phillips, but special versions like Torx, so that the user cannot open the device with common tools.
- Sealed with special screws.
- Plastic chassis is being welded using ultrasonic waves.
- Chassis is glued using a special adhesive.
- Metal covers are spot-fused.
- Cover is specially interlocked.
- RF and Modulation components are covered with shielding case and this shielding case is soldered.
- Shield case is welded at RF and modulation parts, and ID-ROM is welded using the BGA Method.
- Shield case is welded at RF and modulation parts, and ID-ROM is glued at its lead with a special adhesive.
- Shield case is welded at RF and modulation parts, and ID-ROM is glued with anon-transparent laminating agent.
- Semiconductor circuits of high-frequency parts and modulation parts have more than 10 pins distanced smaller than 1.5mm each other.
Description of Image: A close-up photograph of a printed circuit board (PCB) with electronic components. A ruler is placed alongside for scale, showing measurements in centimeters and inches. The PCB appears to be the device under test, with various integrated circuits and passive components visible.
6.2 Receiver Requirements
6.2.1 Spurious Emissions of Rx
| Test Requirement: | Item 19-2 of Article 2 Paragraph 1 |
| Test Method: | MIC Notice No.88 Appendix No.44 |
| EUT Test Status: | Pre-Scan has been conducted to determine the worst-case mode from all possible combinations between available modulations, data rates and antenna ports (if EUT with antenna diversity architecture). Following channel(s) was (were) selected for the final test as listed below. |
| Test Configuration: | EUT ➡️ Spectrum Analyzer |
| EUT conditions: | Rx |
| Measurement Procedure: | Step 1 All spurious are measured from 30 MHz to 12.5 GHz by peak mode. Step 2 IF the value measured by Step1 is 2 dB or less, measure in average mode. |
| Spectrum Analyzer conditions(Step 1): | Frequency: 30 MHz - 12.5 GHz RBW 100 kHz (30 – 1GHz), 1 MHz (over 1GHz) VBW 100 kHz (30 – 1GHz), 1 MHz (over 1GHz) Sweep Time Auto Detector mode Positive peak Indication mode Max hold |
| Spectrum Analyzer Conditions(Step 2): | Frequency: Spurious Frequency Span 0 Hz RBW 100 kHz (30 – 1GHz), 1 MHz (over 1GHz) VBW 100 kHz (30 – 1GHz), 1 MHz (over 1GHz) Sweep Time Auto Detector mode Sample Indication mode Max hold |
| Technical standard: | (1) Below 1 GHz : 4 nW or less (2) 1 GHz and over : 20 nW or less |
| Test result: | Refer to Appendix: 2.4G WIFI of Report No. EED32Q80454003 |
7 Photographs
7.1 EUT Test Setup
Description of Image: A photograph of a laboratory test setup. A computer monitor displays waveforms and data, connected to a spectrum analyzer. Cables run from the spectrum analyzer to an unseen device, presumably the Equipment Under Test (EUT).
7.2 EUT Constructional Details
Refer to Report No. EED32Q80454001 for EUT external and internal photos
The test report is effective only with both signature and specialized stamp. The result(s) shown in this report refer only to the sample(s) tested. Without written approval of CTI, this report can't be reproduced except in full.
*** End of Report ***
