EARFCN 3302 means 2675.20 MHz EARFCN 3303 means 2675.30 MHz

What about 2675.25 MHz? Why don't we have values defined for decimals with two places.

  • $\begingroup$ Because the raster of 100kHz is a good tradeoff between flexibility and complexity. $\endgroup$
    – AlexTP
    Jul 29, 2022 at 7:32
  • $\begingroup$ So it can be possible but due to above reason we avoid it @AlexTP? $\endgroup$ Jul 29, 2022 at 21:39
  • $\begingroup$ Not really. In short, this is just a choice that TSG people agree with. For example, you can define EARFCN 3302 = 2675.25MHz and EARFCN 3303 = 2675.35MHz and technically nothing changes. Just TSG RAN guys thought that integers multiple of 100KHz look nicer. $\endgroup$
    – AlexTP
    Jul 29, 2022 at 22:08
  • $\begingroup$ Because we are talking about specification, then an EARFCN means a frequency multiple of 100KHz by definition. Therefore, no, it cannot be possible. $\endgroup$
    – AlexTP
    Jul 29, 2022 at 22:11

1 Answer 1


From this page (bolding mine):

Since the E-UTRA operates with more flexibility than UMTS , a updated method of identifying the centre carrier frequencies is used. The carrier frequency in the uplink and downlink is designated by the EARFCN (E-UTRA Absolute Radio Frequency Channel Number) in the range 0 – 65535. The channel raster is 100KHz for all bands, which means that the carrier centre frequency must be an integer multiple of 100KHz. The relation between EARFCN and the carrier frequency in MHz for the downlink/uplink is given by an equation and associated table of frequency bands.

So each channel must be separated by 100kHz, whereas your suggestion gives a spacing of 50kHz.


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