PASCO WA-9316A Complete Microwave Optics System - Manual (Page 5)

013-13906B Experiment 1: Introduction to the Microwave Optics System
5
Experiment 1: Introduction to the Microwave Optics System
Equipment Needed:
Purpose
This activity gives an introduction to the Microwave Optics System which may prove helpful in learning to use the equipment
effectively and in understanding the significance of measurements made with this equipment.
Procedure
R
Figure1.1: Equipment Setup
T
R
T
1. Arrange the Transmitter and Receiver on the Goni-
ometer as shown in Figure 1 with the Transmitter
attached to the fixed arm. Be sure to adjust both
Transmitter and Receiver to the same polarity — the
horns should have the same orientation, as shown.
2. Plug in the Transmitter and the Receiver. Turn the
INTENSITY selection switch on the Receiver from
OFF to 10X. (The LEDs should light up on both
units.)
3. Adjust the Transmitter and Receiver so the
distance between the source diode in the
Transmitter and the detector diode in the
Receiver (the distance labeled R in Figure 1)
is 40 cm (see Figure 1.2 for location of points
of transmission and reception). The diodes are
at the locations directly above the points
marked “T” and “R” on the stands. Adjust the
INTENSITY and VARIABLE SENSITIVITY
knobs on the Receiver so that the meter reads
1.0 (full scale).
4. Set the distance R to each of the values shown in Table 1. Record the meter reading for each value of R. (Do not adjust the
Receiver controls between measurements.) After making the measurements, perform the calculations shown in the table.
Item Item
Transmitter Goniometer
Receiver Reflector
Table 1.1: Data
R (cm) Meter Reading (M) M X R (cm)
M X R 2 (cm 2 )
40
50
60
70
80
90
100
Effective Point of Emission of
Transmitter Signal
Effective Point of Reception
of Transmitter Signal
5 cm 5 cm
Figure1.2: Equipment Setup