TWO PORT NETWORK PARAMETERS(Z) - ECS LAB (II year II sem)

AIM:  To determine Z parameter of a given two port passive network.

APPARATUS REQUIRED:

Sl. No.	Name of the Component	Specifications	Quantity
1	Resistors	1 KW	2
		2.2 KW	1
2	R.P.S.	0-30 V	1
3	D. C. Voltmeter	0-50V	1
4	D.C Ammeters	0-50 mA	2
5	Bread board		1

THEORY:

 Z – Parameters:

        Z-parameters are also known as impedance or open circuit parameters. If we choose I₁ and I₂ as independent variables and V₁ and V₂ as dependent variables then the network can be characterized by the given equation

                      V₁ = Z₁₁ I₁+Z₁₂ I­₂

                      V₂ = Z₂₁ I₁+Z₂₂ I₂

PROCEDURE:

 Z – Parameters:

1. Connect the circuit as shown in figure 4.a
2. Keep port 2 open: I₂ = 0
3. Set different voltages on V₁.
4. Measure V₂ and I₁ and tabulate V₁, V₂ and I^­­₁
5. Connect the variable voltage to port 2 and keep the port 1 open circuit i.e. I₁ = 0 as shown in fig.4.b Measure V₂, V₁, I₂. Set different voltages at V₂ and measure I₂ and V₁ for each setting and tabulate

PREACAUTIONS: 

1. Connect the circuit elements as per the circuit diagram

2. Avoid loose connections of the circuit elements

3. Take the readings carefully and accurately

      4. Do not tamper the circuit elements.

OBSERVATIONS:               

 Z – Parameters:

        When I₂ = 0     xc

Sl No.	V1 (Volts)	V2 (Volts) Theoretical	I1  mA) Theoretical	V2(Volts) Practical	I1  mA) Practical	Z11 (Ohms) Theoretical	Z21 (Ohms) Theoretical	Z11 (Ohms) Practical	Z21 (Ohms) Practical
1.	5
2.	10
3.	15
4.	20
5.	25

        When I₁ = 0

Sl No.	V2 (Volts)	V1 (Volts) Theoretical	I2  mA) Theoretical	V1 Volts) Practical	I2  mA)  Practical	Z12 (Ohms) Theoretical	Z22 (Ohms) Theoretical	Z12 (Ohms) Practical	Z22  (Ohms) Practical
1.	5
2.	10
3.	15
4.	20
5.	25

RESULT: