Electronic And Postal Communications (Digital and other Broadcasting Networks) G.N. No. 418 (contd) (b) The geometry for this network is identical to Small Service Area SFN, dense, except for the antenna patterns of the transmitters, which have a reduction of the outgoing field strength of 6 dB over 240 degrees (i.e. it is a semi-closed RN). (c) This network applies to: fixed, outdoor/mobile and indoor reception, for both Band III and Bands IV/V. TABLE 5:PARAMETERS OF SEMI-CLOSED SMALL SERVICE AREA SFN RPC RPC 1 RPC 2 RPC 3 Semi-closed Fixed antenna Semi-closed Portable outdoor and mobile Semi-closed Portable indoor Hexagon Hexagon Hexagon 3 3 3 Triangle Triangle Triangle 40 25 25 Service area diameter D (km) 46 29 29 Tx effective antenna height (m) 150 150 150 Directional 6 dB reduction over 240° Directional 6 dB reduction over 240° Directional 6 dB reduction over 240° Band III 22.0 24.0 32.5 Bands IV/V 29.4 37.2 44.8 Type of network and reception type Geometry of service area Number of transmitters Geometry of transmitter lattice Distance between transmitters d (km) 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. Dar es Salaam 29th November, 2011 MAKAME M. MBARAWA Minister for Communications, Science and Technology 54