SWRA465A August   2014  – July 2015 CC2530 , CC2530 , CC2530-RF4CE , CC2530-RF4CE , CC2592 , CC2592

 

  1.   Using CC2592 Front End With CC2530
    1.     Trademarks
    2. 1  Introduction
    3. 2  Acronyms Used in This Documents
    4. 3  Absolute Maximum Ratings
    5. 4  Electrical Specifications
      1. 4.1 Operating Conditions
      2. 4.2 Current Consumption
      3. 4.3 Receive Parameters
      4. 4.4 Received Signal Strength Indicator (RSSI)
      5. 4.5 Transmit Parameters
      6. 4.6 Output Power Programming
      7. 4.7 Typical Performance Curves
      8. 4.8 IEEE - Transmit Power Spectral Density (PSD) Mask
    6. 5  Application Circuit
      1. 5.1 Power Decoupling
      2. 5.2 Input /Output Matching and Filtering
      3. 5.3 Bias Resistor
      4. 5.4 Antenna Considerations
    7. 6  PCB Layout Considerations
      1. 6.1 The Gain of the CC2592
    8. 7  Regulatory Requirements
      1. 7.1 Compliance of FCC Part 15.247 When Using the CC2530 With the CC2592
    9. 8  Controlling the CC2592
    10. 9  Integrating CC2592 With Z-Stack and TIMAC
    11. 10 References
  2.   A Marker - Delta Method
    1.     A.1
  3.   Revision History

7 Regulatory Requirements

In the United States, the Federal Communications Commission (FCC) is responsible for the regulation of all RF devices. CFR 47, Part 15, regulates RF products intended for unlicensed operation. A product intended for unlicensed operation has to be subject to compliance testing. If the product is approved, the FCC will issue an identification number.

The specific frequency bands used for unlicensed radio equipment for the 2.4 GHz band are regulated by section 15.247 and 15.249. General rules for certification measurements are found in section 15.35. Restricted bands and general limits for spurious emissions are found in sections 15.205 and 15.209.

The FCC Part 15.247 compliance is generally a tougher requirement than ETSI compliance (EN 300 328) due to the restricted bands of operation. There are requirements with regards to ETSI compliance (EN 300 328) that prevent operation at maximum output power. The clause 4.3.2.2 Maximum Power Spectral Density requirement of EN 300 328 requires maximum +10 dBm/ 1 MHz. The output power must, therefore, be reduced to approximately +12 dBm in order to get CE approval. The final output power level depends on the antenna used.

FCC Part 15.247 limits the output power to 1W or +30 dBm when Direct Sequence Spread Spectrum (DSSS) modulation or Frequency Hopping Spread Spectrum (FHSS) with at least 75 hop channels is used. The spectral density of digital modulation systems (not including FHSS) should not exceed 8 dBm/ 3 kHz. The minimum 6 dB bandwidth of such systems is 500 kHz. Since the CC2530 is an IEEE 802.15.4 compliant transceiver, it uses DSSS modulation. The +30 dBm limit therefore applies for the CC2530 with the CC2592 combination.

When complying with Part 15.247, in any 100 kHz bandwidth outside the operating band, the power level should be at least 20 dB below the level in the 100 kHz bandwidth with the highest power level in the operating band. Attenuation below limits given in 15.209 is not required. Emission that fall within restricted bands (15.205) must meet general limits given in 15.209. This is summarized in Table 8. More details about the 2.4 GHz FCC regulations can be found in SRD Regulations for License-Free Transceiver Operation in the 2.4 GHz Band (SWRA060) [8].

Table 8. Summarized FCC 15.247 Regulations for the 2.4 GHz Band

Standard Relevant Frequency Radiated Power (EIRP) Conducted Power Comment
FCC 15.247 2400 – 2483.5 MHz + 30 dBm Maximum 6 dBi antenna gain
Restricted bands defined by 15.205, including the 2nd, 3rd and 5th harmonics –41.2 dBm
All frequencies not covered in above cells –20 dBc