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RF Exposure Info

Controlid Industria e Comercio de Hardware e Servicos De Tecnologia Ltda IDUHF iDUHF 2AKJ4-IDUHF 2AKJ4IDUHF iduhf

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Document DEVICE REPORTGetApplicationAttachment.html?id=7317522
1. RF Exposure Requirements

1.1 General Information

Client Information Applicant: Address of applicant:

Controlid Industria e Comercio de Hardware e Servicos De Tecnologia Ltda Rua Hungria 888, 8th floor, São Paulo 01455-000, Brazil

Manufacturer: Address of manufacturer:

Controlid Industria e Comercio de Hardware e Servicos De Tecnologia Ltda Rua Hungria 888, 8th floor, São Paulo 01455-000, Brazil

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

iDUHF / iDUHF / DC12V / 2AKJ4-IDUHF Mobile device

Technical Characteristics of EUT:

Frequency Range:

902.25-927.75MHz

RF Output Power:

19.30dBm (Conducted)

Modulation:

FHSS

Quantity of Channels:

52

Channel Separation:

500kHz

Type of Antenna:

External Antenna

Antenna Gain:

12.08dBi

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
SRD

Prediction Frequency
(MHz) 902.25

Output Power (dBm) 19.30

Antenna Gain (dBi) 12.08

Duty Cycle
(%) 100

Tune-Up Time-Averaged Power
(dBm) 20.00

ERP
(dBm) 29.93

Frequency

Min. Distance

Max. Power

Option

(MHz)

(cm)

(dBm) (mW)

Exposure Limit (mW)

Ratio

Result Pass/Fail

902.25

B

20

29.93 984.01

1840.59

0.53

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)

Result: Pass



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