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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

 

(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.

 

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