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ETA stands for Equipment type approval. This
approval is for equipment granted by the
WPC(Wireless Planning Coordination) wing for
their use in the Indian Telecom Network. The
department's rules for every equipment or device
that operates in unlicensed frequency bands are
allowed Equipment Type Approval. This means that
they must be designed so that the bandwidth and
other parameters must adapt to the predefined
notifications.

• WPC ETA certification is mandatory for all
  wireless devices, such as WiFi, ZigBee,
  Bluetooth, etc. in India. WPC required products
  in the following categories
• Transmitter
• Transceiver
• Antennas
• Receiver
• Radio sets
• Passive Reflectors
• Devices Excluded from ETA Certificate
• Mobile phones, laptops,
• Smartwatches,

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• Microphones,
• Headphones
• Printers

• Document Required
• RF Reports
• Radiofrequency test report from an ISO 17025
  accredited foreign lab or any NABL accredited
  Indian lab
• Out of band emissions
• Peak power
• Occupied bandwidth
• Power spectral density
• Frequency range and
• RF Test report per either FCC or ETSI for Product
  with Radio which shows the RF test results
• Product technical Brochure
• Purchase Order
• The calculated values must be within limits
  specified by WPC. Suppose the computed value is
  not in WPC limits. In that case, the out of limit
  values must be restricted through
  hardware/software/embedded programming and tested
  again to be complied to be within limits.