Hnaoi-Vietnam: Unwanted emission limits in the pperating band of wide-area base stations

20:52, 10/07/2024

This is the significant content stipulated in Circular 24/2017/TT-BTTTT on National technical regulation on Evolved Universal Terrestrial Radio Access (E-UTRA) Base Stations (BS) in Vietnam.

Depending on each channel bandwidth, there will be different unwanted emission limits. Specifically, the unwanted emission limits for channel bandwidths of 5, 10, 15, and 20 MHz are as follows:

Frequency deviation of -3 dB point of the measuring filter, ∆f	Frequency deviation of the central frequency of the measuring filter, f_offset	Limit	Measurement bandwidth
0 MHz ≤ ∆f < 0.2 MHz	0.165 MHz ≤ f_offset < 0.215 MHz	-12.5 dBm	30 kHz
0.2 MHz ≤ ∆f < 1 MHz	0.215 MHz ≤ f_offset < 1.015 MHz	-14.5 dBm	30 kHz
	1.015 MHz ≤ f_offset < 1.5 MHz	-24.5 dBm	30 kHz
1 MHz ≤ ∆f ≤ min (10 MHz, ∆f_max)	1.5 MHz ≤ f_offset < min (10.5 MHz, f_offset_max)	-11.5 dBm	1 MHz
10 MHz ≤ ∆f ≤ ∆f_max	10.5 MHz ≤ f_offset < f_offset_max	-15 dBm	1 MHz

More details can be found in Circular 24/2017/TT-BTTTT effective from July 1, 2018.

- Thanh Lam -

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