(10) Another study conducted by the Turkish Board of Statistics based on Eurostat criteria showed that while the poverty line rate was 23.8 for Turkey in 2003, this rate was 35.09 per cent in TRC1 (Gaziantep, Adiyaman, and Kilis), 64.33 per cent in TRC2 (Sanliurfa and Diyarbakir), and 82.37 per cent in TRC3
(Mardin, Batman, Sirnak, and Siirt).
Those are type TRC3 audio frequency track circuits that utilise signalling current in one of the following frequencies: 420, 480, 580, 720 or 780 Hz.
The novelty of the work lies in application of theoretical methods to analyse branchy track circuits type TRC3. The aim of the work is to investigate parameters of a branchy track circuit type TRC3 at normal operating conditions.