Electronic And Postal Communications (Digital and other Broadcasting
Networks)
G.N. No. 418 (contd)
The e.r.p. is given for 200 MHz in Band III and 650 MHz in Bands IV/V; for other frequencies (f in MHz) the
frequency correction factor to be added is: 20 log10 (f/200 or f/650) for RPC 1 and 30 log10 (f/200 or f/650) for
RPC 2 and RPC 3.
* The e.r.p. values indicated in this table incorporate an additional power margin of 3 dB.
For the guard interval length, the maximum value 1/4 Tu of the 8k FFT mode is used.
The Licensed Multiplex Operator shall ensure that the distance between transmitters in an SFN
does not exceed the distance equivalent to the guard interval duration.
II: Small service area SFN, dense SFN (Table 3)
(a) The network consists of three transmitters situated at the vertices of an equilateral
triangle.
(b) The transmitters have non-directional antenna patterns.
(c) The reference service area is hexagonal.
(d) This network applies to: fixed, outdoor/mobile and indoor reception, for both Band III
and Bands IV/V.
(e) The network is intended for small service area SFN coverage.
(f) Transmitter sites with appropriate effective antenna heights are required to be available
for this type of network and self-interference restrictions are small.
(g) Typical service area diameters should be from 30 to 50 km.
TABLE 3: PARAMETERS OF SMALL SERVICE AREA SFN
RPC and
reception type
Type of network
Geometry of service area
Number of transmitters
Geometry of transmitter lattice
RPC 1
Fixed antenna
RPC 2
Portable outdoor and
mobile
RPC 3
Portable indoor
Open
Open
Open
Hexagon
Hexagon
Hexagon
3
3
3
Triangle
Triangle
Triangle
Distance between
transmitters d (km)
40
25
25
Service area diameter D (km)
53
33
33
Tx effective antenna height (m)
150
150
150
Non-directional
Non-directional
Non-directional
Band III
24.1
26.6
34.1
Bands IV/V
31.8
39.0
46.3
Tx antenna pattern
e.r.p.* (dBW)
The e.r.p. is given for 200 MHz in Band III and 650 MHz in Bands IV/V; for other frequencies (f in MHz) the
frequency correction factor to be added is: 20 log10 (f/200 or f/650) for RPC 1 and 30 log10 (f/200 or f/650) for
RPC 2 and RPC 3.
* The e.r.p. values indicated in this table incorporate an additional power margin of 3 dB.
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