SWRA797 September   2024 CC1312PSIP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 RF Function and Frequency Range
    2. 1.2 LP-EM-CC1312PSIP
  5. 2Software – Certified PHYs
    1. 2.1 14dBm Tx and Rx Port
      1. 2.1.1 WB-DSSS
      2. 2.1.2 TI 15.4
      3. 2.1.3 PowerG PHY
      4. 2.1.4 mioty PHY
      5. 2.1.5 WiSun PHY
    2. 2.2 20dBm Tx Port
      1. 2.2.1 WB-DSSS PHY
      2. 2.2.2 TI 15.4 PHY
      3. 2.2.3 PowerG PHY
      4. 2.2.4 mioty PHY
      5. 2.2.5 Wi-SUN PHY
  6. 3Hardware
    1. 3.1 Recommended Layout
      1. 3.1.1 4-Layer Design
      2. 3.1.2 2-Layer Design
      3. 3.1.3 GND Vias
      4. 3.1.4 Maximum Track Length
    2. 3.2 Antennas
      1. 3.2.1 Certified Antennas
      2. 3.2.2 Cross-Linking Certified Antennas
    3. 3.3 Reusing of FCC ID and IC
      1. 3.3.1 Documentation Supplied to the TCB
      2. 3.3.2 Permissive Change Policy
        1. 3.3.2.1 Class 1 Permissive Change (C1PC)
        2. 3.3.2.2 Class 2 Permissive Change (C2PC)
        3. 3.3.2.3 Class 3 Permissive Change (C3PC)
      3. 3.3.3 Changes in the FCC ID or IC
      4. 3.3.4 Re-use of FCC ID and IC Certifications Step-by-Step
    4. 3.4 Recommended Production Testing
  7. 4References

3.2.2 Cross-Linking Certified Antennas

If the exact antenna specified in Table 2-1 cannot be used, then the existing antenna gains for each antenna type can be crossed linked providing that the maximum antenna gain is not exceeded. Therefore, an antenna gain up to +2.69dBi is allowed for the CC1312PSIP [4.1] without violating the certification.

If the antenna gain of 2.69dBi is exceeded, then the antenna must be re-filed and a class II permissive change (CP2C) is needed. To file an antenna, the following must be provided in the antenna measurements report:

  • Test Hardware Setup
  • Test Software Setup
  • Table of Calibrated Equipment
  • Test Site Information
  • Completed Test Dates
  • Test Personnel
  • Test Setup Photos
  • Antenna Measurement Data showing how the Antenna Gain is derived

Alternatively, if an established antenna vendor is used, the data sheet must be sufficient to prove the maximum antenna gain but the data sheet must contain or link to the above information.

The end-customer is responsible that radiated emissions (unintentional) is still met at the product level. The certified RF measurement data can be re-used but with other clocks and end equipment the measurement can have other interferences. Thus, when changing to a new antenna, three requirements need to be met:

  • must be one of the types listed (PCB antenna, stanced antenna, chip antenna, whip antenna or wire antenna)
  • must be lower than the max gain of 2.69dBi
  • out of band performance must be similar (thus covered by unintentional radiator at the product level)