RF Exposure Info

Shenzhen Junlan Electronic Ltd JC3719AA 7-IN-1 NOSTALGIC WOODEN MUSIC CENTER, AM/FM,CD TURNTABLE,BLUETOOTH, USB PLAYER/RECORDER OKUJC3719AA OKUJC3719AA jc3719aa

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Document DEVICE REPORTGetApplicationAttachment.html?id=7388754 
1. RF Exposure Requirements

1.1 General Information

Client Information Applicant:
Address of applicant:

SHENZHEN JUNLAN ELECTRONIC LTD No. 277, Pingkui Road, Shijing Community, Pingshan Office, Pingshan New District, Shenzhen, China

Manufacturer: Address of manufacturer:

The same as Applicant The same as Applicant

General Description of EUT: Product Name: Trade Name Model No.: Adding Model(s): Rated Voltage: Battery Capacity: Adapter Model: FCC ID: Equipment Type:

7-IN-1 NOSTALGIC WOODEN MUSIC CENTER, AM/FM,CD TURNTABLE,BLUETOOTH, USB PLAYER/RECORDER memorex JC-3719AA MX-TT700, MEMMC71, JC-3719, MX-TT7XX, MEMMCXX, JC-3719XX (XX stands for A-Z or 0-9 or blank) DC 9V / Input:AC 100-240~ ,50/60Hz 0.5A MAX Output:DC 9V1300mA OKUJC3719AA Mobile device

Technical Characteristics of EUT:

Bluetooth

Bluetooth Version:

V5.1 (BR/EDR mode)

Frequency Range:

2402-2480MHz

RF Output Power:

3.919dBm (Conducted)

Data Rate:

1Mbps, 2Mbps

Modulation:

GFSK, /4 DQPSK

Quantity of Channels:

79

Channel Separation:

1MHz

Type of Antenna:

PCB Antenna

Antenna Gain:

-0.58dBi

1.2 RF Exposure Exemption
According to §1.1307(b)(3) and KDB 447498 D04 Interim General RF Exposure Guidance v01, system operating under the provisions of this section shall be operating in a manner that the public is not exposed to radio frequency energy level in excess limit for maximum permissible exposure.
Option A: FCC Rule Part 1.1307 (b)(3)(i)(A):The available maximum time-averaged power is no more than 1mW, regardless of separation distance.
Option B: FCC Rule Part 1.1307 (b)(3)(i)(B): The available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold Pth (mW) described in the following formula. Pth is given by:

Option C: FCC Rule Part 1.1307 (b)(3)(i)(C): The minimum separation distance (R in meters) from the body of a nearby person for the frequency (f in MHz) at which the source operates, the ERP (watts) is no more than the calculated value prescribed for that frequency. R must be at least /2, where  is the free-space operating wavelength in meters.

Single RF Sources Subject to Routine Environmental Evaluation

RF Source frequency (MHz)

Threshold ERP (watts)

0.3-1.34

1,920 R2

1.34-30

3,450 R2/f2

30-300

3.83 R2

300-1,500

0.0128 R2f

1,500-100,000

19.2R2

For Multiple RF sources: FCC Rule Part 1.1307(b)(3)(ii): (A) The available maximum time-averaged power of each source is no more than 1 mW and there is a
separation distance of two centimeters between any portion of a radiating structure operating and the nearest portion of any other radiating structure in the same device, except if the sum of multiple sources is less than 1 mW during the time-averaging period, in which case they may be treated as a single source (separation is not required). (B) In the case of fixed RF sources operating in the same time-averaging period, or of multiple mobile or portable RF sources within a device operating in the same time averaging period, if the sum of the fractional contributions to the applicable thresholds is less than or equal to 1 as indicated in the following equation.

1.3 Calculated Result

Radio Access Technology Bluetooth

Prediction Frequency
(MHz) 2402

Output Power (dBm) 3.919

Antenna Gain (dBi) -0.58

Duty Cycle
(%) 100

Tune-Up Time-Averaged Power
(dBm) 4.00

ERP
(dBm) 1.27

Frequency

Min. Distance

Max. Power

Option

(MHz)

(cm)

(dBm) (mW)

Exposure Limit (mW)

Ratio

Result Pass/Fail

2402

B

0.5

4.00

2.51

2.788

0.90

Pass

Note: 1. Time-Averaged Power=Output Power * Duty Cycle; ERP= Time-Averaged Power+ Antenna

gain-2.15dB

2. Option A, B and C refers as clause 1.2.

3. For option B, Max (time-averaged power, effective radiated power (ERP)) converts to Max. Power. For

option C, ERP converts to Max. Power;

4. For option B, Pth (mW) converts to Exposure Limit (mW); For option C, ERP (W) converts to Exposure

Limit (mW).

5. Ratio= Tune-Up ERP (mW)/ Exposure Limit (mW)

Mode for Simultaneous Multi-band Transmission:

Radio Access Technology

Ratio 1

Ratio 2

--

--

--

Result: Pass

Simultaneous Ratio --

Limit --

Result Pass/Fail
--

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