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| Publication Number: 970781 |
Rule Parts: |
Publication Date: 03/26/2007 |
| Keyword: Emission designators, CDMA cell phones |
| First Category: |
Administrative Requirements |
| Second Category: |
Equipment Authorization Process |
| Question: What is the requirement on emission designators regarding the use of W as the third symbol? Should the W be used for a transmitter that can simultaneously (over multiple channels) transmit both data and voice, or should the transmitter should have the multiple emission designators - one for each type of emission? |
| Answer: The requirements for emission designators are covered in 47 CFR 2.206. The letter W has been used as the third symbol in the emission classification to represent circumstances when the information baseband contains a combination of information and content - such as voice and data. The most common example is Code Division Multiple Access (CDMA) where multiple information channels exist on one modulated carrier. If a transmitter is certified to transmit voice or data, then there must be two separate emission designators on the Grant. |
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