Regulations > Regulations on the use of Television White Spaces, 2018 > 9. Operation of WSD Adjacent to a Broadcast TV Channel

(1)

A WSD operating adjacent to the occupied TV channels must have the out-of-band-emissions based on the adjacent channel leakage ratios (ACLRs) limits established for the WSD emission classes prescribed in Table 2 in compliance with the latest version of ETSI EN 301 598 standard, or successor directives4.

Table 2 ACLR limits per classes of WSDs on the nth adjacent TV channel

WSD out-of-band power falls within the nth adjacent TV channel (per 8MHz channels)	ACLR (dB)
	Class 1	Class 2	Class 3	Class 4	Class 5
n = ± 1	74	74	64	54	43
n = ± 2	79	74	74	64	53
n ≥ + 3 or n ≤ - 3	84	74	84	74	64

(2)	The WSD out-of-band power (EIRP) spectral density shall be measured in the first 100 kHz beyond the channel edge.

(3)	The WSD out-of-band power (EIRP) spectral density shall be less than or equal to the measured in-band transmit power spectral density over 8 MHz minus the ACLR (-84dBm).

(4)	If a WSD use channel bonding technique to transmit on multiple contiguous TVWS channels as guided by the secondary GLSD; the ACLR limits in Table 2:

(a)	do not apply within the bonded adjacent contiguous channels; but

(b)	do apply within the 8 MHz TV channel immediately adjacent below and above the edges of the bonded channels.

______________________________

4 http://www.etsi.org/technologies-clusters/technologies/regulation-legislation/red

Electronic Communications Act, 2005 (Act No. 36 of 2005)

Regulations

Regulations on the use of Television White Spaces, 2018

9. Operation of WSD Adjacent to a Broadcast TV Channel