1.1.1 Electromagnetic Fields
Result: Pass
Test Item: BLOMPRAKT
Identification / Type No.: E2503
FCC ID: FHO-E2503
IC: 10912A-E2503
Test Standard: CFR47 FCC Part 2: Section 2.1093, CFR47 FCC Part 1: Section 1.1310, FCC KDB Publication 447498 D04 V01, RSS-102 Issue 6 December 2023
Product Classification
This device is classified as a transmitting device designed for use in non-fixed locations, where the RF source's radiating structure(s) is/are within 20 centimeters of the user's body.
Maximum Antenna Gain: 1.50 dBi
Radio Frequency Exposure Limit
For FCC, compliance is determined by the maximum time-averaged power or effective radiated power (ERP), whichever is greater, being less than or equal to the threshold Pth (mW). This method is applicable for separation distances (cm) from 0.5 to 40 centimeters and frequencies from 0.3 GHz to 6 GHz (inclusive).
Pth (mW) =
ERP20 cm * (d/20 cm)x if d ≤ 20 cmERP20 cm if 20 cm < d ≤ 40 cm
Where:
x = -log10 (60 / (ERP20 cm * √f)) and f is in GHz;
ERP20 cm (mW) =
2040f if 0.3 GHz ≤ f < 1.5 GHz3060 if 1.5 GHz ≤ f ≤ 6 GHz
d = the separation distance (cm);
a) EUT RF Exposure Evaluation standalone operations
FCC
| Mode | Frequency [GHz] | *Measured RF Output Power [dBm] | Antenna Gain [dBi] | RF Output Power [mW] | ERP [mW] | d [cm] | Limit-Pth [mW] |
|---|---|---|---|---|---|---|---|
| BR/EDR | 2.402 | 9.6 | 1.5 | 9.12 | 7.85 | 1.5 | 22.42 |
| 2.4GHz proprietary | 2.480 | 9.2 | 1.5 | 8.32 | 7.16 | 1.5 | 22.02 |
IC
| Mode | Frequency [MHz] | *Measured RF Output Power [dBm] | Antenna Gain [dBi] | RF Output Power [mW] | EIRP [mW] | Distance [cm] | Limit [mW] |
|---|---|---|---|---|---|---|---|
| BR/EDR | 2402 | 9.6 | 1.5 | 9.12 | 12.88 | 1.5 | 16.14 |
| 2.4GHz proprietary | 2480 | 9.2 | 1.5 | 8.32 | 11.75 | 1.5 | 15.97 |
Notes:
- BR/EDR RF Output Power: Refer CN2413N0 001
- 2.4GHz proprietary Output Power: Refer CN24F3D4 001
- 2.4 GHz proprietary and Bluetooth share the same RF IC and antenna, so no need for simultaneous transmission evaluation.
Conclusion
The minimum distance between the antenna and the enclosure of the product is 2.64cm, which is larger than the specified 1.5cm. Therefore, the maximum calculation results meet the requirements of the Radio Frequency Exposure limit.
