From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 401/CH12/EX12.18/Example12_18.jpg | Bin 0 -> 37881 bytes
 401/CH12/EX12.18/Example12_18.sce |  37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100755 401/CH12/EX12.18/Example12_18.jpg
 create mode 100755 401/CH12/EX12.18/Example12_18.sce

(limited to '401/CH12/EX12.18')

diff --git a/401/CH12/EX12.18/Example12_18.jpg b/401/CH12/EX12.18/Example12_18.jpg
new file mode 100755
index 000000000..94acccad1
Binary files /dev/null and b/401/CH12/EX12.18/Example12_18.jpg differ
diff --git a/401/CH12/EX12.18/Example12_18.sce b/401/CH12/EX12.18/Example12_18.sce
new file mode 100755
index 000000000..4a6b177f6
--- /dev/null
+++ b/401/CH12/EX12.18/Example12_18.sce
@@ -0,0 +1,37 @@
+//Example 12.18
+//Program to form  comparision showing total channel loss against 
+//number of nodes for:
+//(i)Bus Distribution System
+//(ii)Star Distribution System
+
+clear;
+clc ;
+close ;
+
+//Given data
+alpha_cr=1;                     //dB - CONNECTOR LOSS
+alpha_fc=5;                     //dB/km - FIBER CABLE LOSS
+L_bu=0.1                        //m - FIBER LENGTH
+L_tr=10;                        //dB - ACCESS COUPLER TAP RATIO
+L_sp=3;                         //dB - SPLITTER LOSS
+L_ac=1;                         //dB - ACCESS COUPLER INSERTION LOSS
+L_st=0.1;                       //m - TOTAL FIBER LENGTH IN STAR ARMS 
+L_ex=0;                         //dB - STAR COUPLER EXCESS LOSS
+
+//Bus Distribution System
+N=0:0.01:11;
+Cl_bus=2*alpha_cr+(N-1)*alpha_fc*L_bu+(2*alpha_cr+L_ac)*(N-3)+(2*alpha_cr+L_tr)+L_sp+alpha_cr;
+Hm=abs(Cl_bus);
+figure;
+plot2d(N,Hm,2);
+
+//Star Distribution System
+N=1:0.01:30;
+Cl_star=4*alpha_cr+alpha_fc*L_st+10*log10(N)+L_ex;
+Hm=abs(Cl_star);
+plot2d(N,Hm,5);
+xlabel('Number of Nodes N');
+ylabel('Total Channel Loss Cl(dB)');
+title('CHARACTERISTICS FOR TWO DISTRIBUTION SYSTEMS (BUS AND STAR)');
+xgrid (1);
+h=legend(['LINEAR BUS';'STAR']);
\ No newline at end of file
-- 
cgit