V9X-STD5042.4 GHz DSSS low power radio transceiver

Saelig Co. Inc. 71A Perinton Pkwy Fairport NY 14450 585-385-1740 www.saelig.com Date: October 16, 2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 RE: CFR 47 §2.911 (d)(7) FCC US Agent Letter of Attestation FCC ID: V9X-STD504 Grantee FRN: 0017721283 To whom it may concern: FCC US Agent Contact Person: Alan Lowne Company Name: Saelig Company, Inc. FRN: 0033976408 Company Address: 71A Perinton Pkwy Fairport, NY 14450 United States Email: [email protected] This letter is to confirm that we have accepted the responsibility to act as US Agent on behalf of Circuit Design, Inc. (“the applicant”) for the above referenced FCC ID. We are aware of the requirements and responsibilities of the applicant’s agent for service of process as outlined in the FCC section §2.911(d)(7) and Report and Order FCC 22-84 paragraph 63. Sincerely yours, Signature: Alan Lowne Saelig Company, Inc.

STD-504 Model： 1 2 3 4 5 x x x ± ± ± ～ ～ ～ △ △ △ D ± △ x WR. P D F S.Tanaka S.Tanaka 00000 2:1 202 3.10.05 SERIAL LABEL U094B01D01 STD-504 4 - R 1 25 25 17.5 007-****** R IC： 6079A-STD504 FCC ID: V9X-STD504 S/No: 00000000 MADE IN JAPANMADE IN JAPAN 5 00.3 3.5 The permanet product label will remain safe during the product's lifespan

UL Japan, Inc. Kashima EMC Lab 1614, Mushihata, Katori-shi, Chiba-ken, 289-0341 Japan T:: +81.478.88.6500 / F:: +81.478.82.3373 / W:: japan.ul.com March 4, 2024 FCC ID: V9X-STD504 To whom it may concern, We, UL Japan, Inc, hereby declare that 2.4 GHz DSSS low power radio transceiver, model: STD-504 (FCC ID: V9X-STD504) of Circuit Design, Inc. is exempt from RF exposure SAR evaluation because the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold P th (mW) described in the following formula according to the Code of Federal Regulation title 47 section 1.1307(b)(3)(i)(B). This method is used at separation distances d (cm) from 0.5 centimeters to 40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive) for single RF sources. P th is given by: 푃 ௧௛ ሺ mW ሻ ൌ൜ 퐸푅푃 ଶ଴ ୡ୫ ሺ푑 / 20 cmሻ ௫ 퐸푅푃 ଶ଴ ୡ୫ 푑൑20 cm 20 cm ൏ 푑 ൑ 40 cm Where 푥ൌെlog ଵ଴ ቆ 60 퐸푅푃 ଶ଴ ୡ୫ ඥ 푓 ቇand 푓 is in GHz 퐸푅푃 ଶ଴ ୡ୫ ሺ mW ሻ ൌቊ 2040푓 3060 0.3 GHz൑푓൏1.5 GHz 1.5 GHz൑푓൑6 GHz When the minimum separation distance is shorter than 0.5 cm, 0.5 cm is applied. The SAR evaluation exemption threshold is calculated as below. Pth (mW )3060(dBm)7.85 f (GHz)2.4765(mW)6.10 ERP 20 cm (mW)30603.50 d (cm)20.011.35 (dBm)9.21 (mW)8.34 The Maximum time-averaged power or ERP whichever greater is 8.4 mW. (Rounded up to two decimals place) Conducted Power Antenna Gain (dBi) EIRP (dBm) ERP *The highest antenna gain was applied. Thank you for your attention to this matter. Kenichi Suda Manager

Model nameAntenna type & gainManufacturerRemarks ANT-2G4S3Whip Antenna Gain: 0dBi Joymax Electronics Co., Ltd. No. 5, Dong-yuan 2nd Rd., Zhong-li Dist., Tao-yuan City 32063 Taiwan Specification sheet No. 1400047 ANT-2G4S2 Sleeve Antenna Gain: 2dBi Joymax Electronics Co., Ltd. No. 5, Dong-yuan 2nd Rd., Zhong-li Dist., Tao-yuan City 32063 Taiwan Specification sheet No.1600040 https://www.cdt21.com/products/ant-2g4s2/?=page02 ANT-2G4S2-L Sleeve Antenna Gain: 2dBi Joymax Electronics Co., Ltd. No. 5, Dong-yuan 2nd Rd., Zhong-li Dist., Tao-yuan City 32063 Taiwan Specification sheet No.1600040 https://www.cdt21.com/products/ant-2g4s2/?=page02 The antenna characteristic is the same as that of ANT- 2G4S2 except for the antenna shape (L-shaped). ANT-2G4W1R-R Whip antenna swivel type Gain: 2dBi Joymax Electronics Co., Ltd. No. 5, Dong-yuan 2nd Rd., Zhong-li Dist., Tao-yuan City 32063 Taiwan Specification sheet No. 1100157 ANT-2400-SFW Waterproof swivel type Gain: 2dBi Joymax Electronics Co., Ltd. No. 5, Dong-yuan 2nd Rd., Zhong-li Dist., Tao-yuan City 32063 Taiwan Specification sheet No. 140005-1 https://www.cdt21.com/products/ant-2400-sfw/?=page02 W5I-BO-07PCB antenna Gain: 2.5 +/- 1dBi WINiZEN Co., Ltd. 377-4, Hajung-dong, Siheung Si, GYEONGGI-DO, 429-250, KOREA Connection cable CBL-RPSMARD-MH S-Conn Enterprise Co., Ltd. 213, Chengren E. St., Renwu District, Kaohsiung City 81456,Taiwan (R.O.C.) To be used with ANT-2G4W1R-R/ANT-2400-SFW Address ： 213, Chengren E. St., Renwu District, Kaohsiung City 81456,Taiwan (R.O.C.)

ANT-2G4S2/ANT-2G4S2-L 変 更 履 歴 書 年 月 日 納入仕様書 No ﾊﾞｰｼﾞｮﾝ 変更経歴及び理由 受領日 2016.04.05 1600040 REV.00 初版作成















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     Joymax Electronics Co., Ltd. No. 5, Dong-yuan 2nd Rd., Zhong-li Dist., Tao-yuan City 32063 Taiwan 1. Specification 1.1 Drawing 
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: 525 nom.
/km Capacitance: 98 pF/m nom Construction: A) Inner Conductor: Silver Plated Copper OD 0.237mm B) Dielectric: Extruded PTEE OD 0.68 C) Outer Conductor: Siler Plated Copper OD 0.9mm D) Outer Jacket: Fep-brown tint OD 1.13±0.05mm Scope: This specification presents a FEP jacketed COAXIAL cable AWG32, 1.13 mm O.D. for internal wiring of electronic equipment,such as Computer/Notebook with wireless communication systems. Attenuation: 100MHz 63.21 dB/100m 400MHz 131.20 dB/100m 800MHz 190.55 dB/100m 1GHz 226.47 dB/100m 2GHz 322.43 dB/100m 3GHz 414.92 dB/100m 4GHz 512.47 dB/100m 5GHz 593.76 dB/100m 6GHz 660.42 dB/100m
 Model NO.IHF-ME02MPBX-350W030 Return loss/V.S.W.R  2.Test Report 2.1 Electrical test Return loss V.S.W.R.
  Model NO.IHF-ME02MPBX-350W030 Pattern Test Test Equipment Anechoic chamber: 100MHz~6GHz 8*6*6m (
1m Quiet zone at 800MHz) Soure Antenna: ETS-3164 Dual Polarized Horn Network Analyzer: Agilent E5071B 100kHz~8.5GHz 2D Patten Test Instrument 0 deg 90 deg 350mm

  Model NO.IHF-ME02MPBX-350W030 Pattern Test H-plane 2D Patterns E-plane
 

ANT-2G4S3 Joymax Electronics Co., Ltd. No. 5, Dong-yuan 2nd Rd., Zhong-li Dist., Tao-yuan City 32063 Taiwan Gain: 0dBi

ANT-2G4W1R-R Joymax Electronics Co., Ltd. No. 5, Dong-yuan 2nd Rd., Zhong-li Dist., Tao-yuan City 32063 Taiwan

Joymax Electronics Co., Ltd. No. 5, Dong-yuan 2nd Rd., Zhong-li Dist., Tao-yuan City 32063 Taiwan

- 1 - Object Internal Antenna Page 1 of 6 Customer Date February 19, 2010 System WLAN/ Bluetooth/ Zigbee Rev. A Model Name W5I–BO-07 Written by W. I. KWAK Electrical Specifications Frequency Range ( MHz ) 2400 〜 2483.5 Band Width ( MHz ) 83.5 V.S.W.R ( Min ) 1.9 : 1 Gain ( Max ) 2.5 ± 1 ( dBi ) Input Impedance 50 ( Ω ) Polarization Linear Mechanical Specifications Antenna Size (Length x Width x Height ) 48 × 8 × 1 mm Weight N / A Connector I-PEX MHF Cable Length 130 mm Radiator Material Copper Operation Temperature – 30 〜 70 ( °C ) Operation Humidity 10 〜 90 ( % ) Option Remarks Data measured at free-space. WINiZEN Co., Ltd. Specifications Sheet WINiZEN Co., Ltd. 377-4, Hajung-dong, Siheung Si, GYEONGGI-DO, 429-250, KOREA - 2 - Fig 1. Return Loss (Agilent E8357A 300KHz∼6GHz PNA Series Network Analyzer) Fig 2. V.S.W.R (Agilent E8357A 300KHz∼6GHz PNA Series Network Analyzer) - 3 - Fig 3. Smith Chart (Agilent E8357A 300KHz∼6GHz PNA Series Network Analyzer) LEFT - 4 - Fig 4. Measurement Configuration Fig 5. Axis Definitions (Antenna Center ) Z AxisZ Axis X Axis X Axis Y Axis Y Axis a. Azimuth Pattern (Co-pol) : XY Plane ; Horn Antenna Polarization : Vertical b. Elevation Pattern (Co-pol) : XZ Plane ; Horn Antenna Polarization : Horizontal c. Elevation Side Pattern (Co-pol) : YZ Plane ; Horn Antenna Polarization : Horizontal - 5 - Fig 6. Gain Patterns a. Azimuth Pattern b. Elevation Pattern - 6 - Fig 7. Antenna Mechanical

Test Report No. 14908125M-A-R1 Page 1 of 81 UL Japan, Inc. Kashima EMC Lab. 1614, Mushihata, Katori-shi, Chiba-ken, 289-0341 Japan / +81-478-88-6500 RADIO TEST REPORT Test Report No. 14908125M-A-R1 Customer Circuit Design, Inc. Description of EUT 2.4 GHz DSSS low power radio transceiver Model Number of EUT STD-504 FCC ID V9X-STD504 Test Regulation FCC Part 15 Subpart C Test Result Complied Issue Date March 25, 2024 Remarks- Representative Test Engineer Approved By Kazuhiro Ando Engineer Kenichi Suda Manager CERTIFICATE 1266.01 The testing in which "Non-accreditation" is displayed is outside the accreditation scopes in UL Japan, Inc. There is no testing item of "Non-accreditation". Repo rt Cover Page - Form-ULID-003532 (DCS:13-EM-F0429) Issue# 23.0 Test Report No. 14908125M-A-R1 Page 2 of 81 UL Japan, Inc. Kashima EMC Lab. 1614, Mushihata, Katori-shi, Chiba-ken, 289-0341 Japan / +81-478-88-6500 ANNOUNCEMENT REVISION HISTORY Original Test Report No.: 14908125M-A This report is a revised version of 14908125M- A. 14908125M-A is replaced with this report. Revision Test Report No. Date Page Revised Contents - (Original) 14908125M-A March 4, 2024 - 1 14908125M-A-R1 March 25, 2024 P.5, Change of Operating temperature From: -20 deg. C to +65 deg. C To: -30 deg. C to +70 deg. C 1 14908125M-A-R1 March 25, 2024 P.5, Correction of antenna description of *1) From: connector shape To: antenna shape 1 14908125M-A-R1 March 25, 2024 P.5, Correction of antenna description of *2) From : ANT-2G4W1R-R and ANT-2400-SFW To: ANT-2400-SFW and ANT-2G4W1R-R 1 14908125M-A-R1 March 25, 2024 P.6, Change of worst margin From: 3.4 dB 4953.00 MHz, AV, Vertical To: 2.0 dB 4953.00 MHz, AV, Horizontal 1 14908125M-A-R1 March 25, 2024 P.16, Change of Worst case position of ANT-2G4S3 antenna 1 14908125M-A-R1 March 25, 2024 P.28, Correction of typo of TRX2 port [MHz] [dBm] [dB] [dB] [dBm] [mW] [dB] [dBm] [mW] 2471.5 -6.61 0.92 10.05 4.36 2.73 0.00 4.36 2.73 ↓ [MHz] [dBm] [dB] [dB] [dBm] [mW] [dB] [dBm] [mW] 2471.5 -6.82 0.92 10.05 4.15 2.60 0.00 4.15 2.60 1 14908125M-A-R1 March 25, 2024 P.18, P.30 – P.36, Replaced with the corrected data. 1 14908125M-A-R1 March 25, 2024 P.58, Added the notes. 1 14908125M-A-R1 March 25, 2024 P.64, Added horn antenna (LIMS ID: 143456) to the list of Test Instruments.  This test report shall not be reproduced in full or partial, without the written approval of UL Japan, Inc.  The results in this report appl y only to the sample tested. (Laboratory was not involved in sampling.)  This sample tested is in compliance with the limits of the above re gulation.  The test results in this test report are traceable to the national or international standards.  This test report must not be used by the customer to claim product certification, approval, or endorsement b y the A2LA accreditation body.  This test report covers Radio technical requirements. It does not cover administrative issues such as Manual or non-Radio test related Requirements. (if applicable)  The all test items in this test report are conducted b y UL Japan, Inc. Kashima EMC Lab.  The opinions and the interpretations to the result of the description in this report are outside scopes where UL Japan, Inc. has been accredited.  The information provided b y the customer for this report is identified in SECTION 1.  The laboratory is not responsible for information provided by the customer which can impact the validit y of the results.  For test report (s) referred in this report, the latest version (including any revisions) is always referred. Test Report No. 14908125M-A-R1 Page 3 of 81 UL Japan, Inc. Kashima EMC Lab. 1614, Mushihata, Katori-shi, Chiba-ken, 289-0341 Japan / +81-478-88-6500 Reference: Abbreviations (Including words undescribed in this report) A2LA The American Association for Laboratory Accreditation ICES Interference-Causing Equipment Standard AC Alternating Current IEC International Electrotechnical Commission AFH Adaptive Frequency Hopping IEEE Institute of Electrical and Electronics Engineers AM Amplitude Modulation IF Intermediate Frequency Amp, AMP Amplifier ILAC International Laboratory Accreditation Conference ANSI American National Standards Institute ISED Innovation, Science and Economic Development Canada Ant, ANT Antenna ISO International Organization for Standardization AP Access Point JAB Japan Accreditation Board ASK Amplitude Shift Keying LAN Local Area Network Atten., ATT Attenuator LIMS Laboratory Information Management System AV Average MCS Modulation and Coding Scheme BPSK Binary Phase-Shift Keying MRA Mutual Recognition Arrangement BR Bluetooth Basic Rate N/A Not Applicable BT Bluetooth NIST National Institute of Standards and Technology BT LE Bluetooth Low Energy NS No signal detect. BW BandWidth NSA Normalized Site Attenuation Cal Int Calibration Interval NVLAP National Voluntary Laboratory Accreditation Pro gram CCK Complementary Code Keying OBW Occupied Band Width Ch., CH Channel OFDM Orthogonal Frequency Division Multiplexing CISPR Comite International Special des Perturbations Radioelectriques P/M Power meter CW Continuous Wave PCB Printed Circuit Board DBPSK Differential BPSK PER Packet Error Rate DC Direct Current PHY Physical Layer D-factor Distance factor PK Peak DFS Dynamic Frequency Selection PN Pseudo random Noise DQPSK Differential QPSK PRBS Pseudo-Random Bit Sequence DSSS Direct Sequence Spread Spectrum PSD Power Spectral Density EDR Enhanced Data Rate QAM Quadrature Amplitude Modulation EIRP, e.i.r.p. Equivalent Isotropically Radiated Power QP Quasi-Peak EMC ElectroMagnetic Compatibility QPSK Quadri-Phase Shift Keying EMI ElectroMagnetic Interference RBW Resolution Band Width EN European Norm RDS Radio Data System ERP, e.r.p. Effective Radiated Power RE Radio Equipment EU European Union RF Radio Frequency EUT Equipment Under Test RMS Root Mean Square Fac. Factor RSS Radio Standards Specifications FCC Federal Communications Commission Rx Receiving FHSS Frequency Hopping Spread Spec…

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