IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308 __________________________________________________________________________________________ Volume: 03 Issue: 04 | Apr-2014, Available @ http://www.ijret.org 520 PERFORMANCE EVALUATION OF PATH LOSS PARAMETERS FOR BROADCASTING APPLICATIONS Pardeep Pathania 1 , Parveen Kumar 2 , Shashi B. Rana 3 1 Dept. of Electronics and Communication Enginerring, Beant College of Engineering and Technology, Gurdaspur (Punjab) India 2 Dept. of Electronics and Communication Enginerring, Beant College of Engineering and Technology, Gurdaspur (Punjab) India 3* Corresponding Author, Dept. of Electronics Technology, Guru Nanak Dev University Regional Campus, Gurdaspur (Punjab) India Abstract In this research paper we investigated the effect of different path loss parameters with respect to distance in northen region of India (State: Punjab and Jammu) by using low and high power RF transmitter. In order to achieve good and reliable reception a practical broadcast engineers must know the suitability of appropriate model so as to design the various parameters of a transmitting station for achieving the high quality of signal at a known distance. In this paper we have taken field strength measurements for 100w FM and 10KW FM station at almost identical distances (50 Km) in different locations. All the measurements (readings) have been taken with the help of anritsu site master and by using the suitable anritsu dipole antenna. Comparative study of all graphs has been taken with respect to FCC f(50,50) curves. In this paper, various investigations and their graphs have been plotted to show a compa rative analysis of different parameters. In our measurements, we have used receiving antenna of 4 meter height and subsequent conversion has been applied to convert measurement (readings) into 9 meter receiving antenna height. Keywords: Path loss, field strength, RF transmitted power, Receving antenna height, dipole antenna etc. ----------------------------------------------------------------------***-------------------------------------------------------------------- 1. INTRODUCTION Computation of path loss is an essential element of the system design in any communication system. In radio and in TV broadcast system, estimation of the path loss is very significant as environment is continuously [1] changing with respect to time. Then question arises how to compute the path loss with utmost accuracy. Then its answer is by using the concept of propagation model. In the latest years, propagation models have been emerges as an active area of the study. A reliable propagation model is the one which estimate the path loss with the highest accuracy and with small standard deviation. This will help the telecommunication engineer to optimize the coverage area and use the [2] accurate transmitted power. This technique allow for the assessment of the path loss as a function of the distance, frequency, and transmitting antenna height for the fixed receiving antenna height. FCC f(50,50) curves are intended for use in coverage forecast of broadcasting service in UHF and VHF band and are frequency independent, [3] so these can further be used for our comparative analysis for Fm applications. It must be noted that FCC f(50,50) curve is intended for broadcasting service. It must be noted that these curve and original curve (FCC) were to be used for scheduling and planning of FM broadcast service in Punjab (Pathankot and Jammu) region of India. These curves were intended to be used by operational [4] and telecommunication engineers and hence allow the estimation of path loss & electric field strength which were further be useful for various applications in outdoor communication system. Path loss is an unwanted reduction in signal i.e field stength when propagating from transmitter to receiver Further, path loss will depend on antenna height, frequency, distance and on the environmental condition. Frequency and distance are to be taken into account in almost [5] every model. Accurateness of model in particular environment will depend on relational best fit between different parameter required by model and those existing for related area. An extensive range of techniques have been developed over the years to calculate the coverage by using the propagation model. In general, propagation means broadcasting of the signal from the [6] transmitter to receiver. Empirical models uses existing equation obtained from the result of numerous measurement efforts. These models gives most precise result with ease of computational effot than deterministic models [7]. Objective of this present work is to study the variation of the received signal strength versus distance for the different location of the northern region of India (Punjab: Pathankot and Jammu). Similar work have been reported [8] in various