User guide

ManualsBrands3B Scientific ManualsOptical devicesMicrowave Set 9.4 GHz (230 V, 50__60 Hz)

3B SCIENTIFIC

PHYSICS

Microwave Set 9.4 GHz (230 V, 50/60 Hz)

Microwave Set 10.5 GHz (115 V, 50/60 Hz)

1009951 / U8493600-230

1009950 / U8493600-115

Instruction sheet

08/11 ERL/ALF

Control unit

1 Receiver terminal

2 Amplifier output

3 Amplifier output (ground)

4 Transmitter terminal

5 Modulation input (ground)

6 Modulation input

7 Modulator selector switch (inter-

nal/off/external),

8 Switch for internal speaker

9 Controller for receiver signal

amplification

10 Socket for 12-V AC plug-in power

supply (rear of case)

Accessories

11 Transmitter with horn antenna

12 Stand for prism

13 Paraffin prism

14 Reflection plate

15 Cover plate for double slit

16 Plate with double slit

17 Absorption plate

18 Polarisation grating

19 Receiver with horn antenna

20 Microwave bench

21 Microwave probe

22 Folding microwave bench with

plate holder

Summary of content (6 pages)

PAGE 1
3B SCIENTIFIC® PHYSICS Microwave Set 9.4 GHz (230 V, 50/60 Hz) Microwave Set 10.
PAGE 2
1 1 1 1 1 1 1 1. Safety instructions High frequency radio waves can penetrate biological tissues and cause them to heat up. The microwave transmitter included here is sufficiently low-powered that the hazards are negligible when it is used correctly. Safe operation of the equipment is guaranteed, provided it is used correctly. However, there is no guarantee of safety if the equipment is used in an improper or careless manner.
PAGE 3
• Use switch (7) to send the modulator to “INT”. The microwave signal emitted is modulated with a square wave. The modulation frequency can be listened to by means of the built-in speaker. The amplified receiver signal can be output from sockets (2) and (3) in the form of a DC signal (once modulation has been turned off), in the form of a square wave (with internal modulation) or in the form of low frequency signal (external modulation). Modulation is deactivated when switch (7) is in its centre position.
PAGE 4
6.4 Reflection • Set up the basic configuration (5.1). • Line up the reflector plate at angles of approximately 30°, 40°, 50° and 60° with the help of the pointer for the rails, which points in the direction of the normal (a line perpendicular to the mirror’s surface). • Change the angle of the long rail until the maximum reception is attained. • Measure angles of incidence from the normal (arrow). Conclusion: an electrical conductor reflects microwaves. This confirms the law of reflection. 6.
PAGE 5
6.7 Huygens’ principle • Set up the transmitter (11) about 20 cm from the plate holder and the receiver (19) about 80 cm behind the late holder on the rails. • Turn the receiver around on its rail so that it is out of the bundled microwave beam and the signal is clearly weakened. • Insert a single slit aperture into the plate holder and secure it gently in place (line up the centre of the slit in the centre of the plate).
PAGE 6
.10 Polarisation • Set up the polarisation grating (18) in the screen holder. • Check the reception when the polarisation grating is aligned horizontally. • Check the reception when the polarisation grating is aligned vertically. Conclusion: Since in one state a signal is received but when the grating is rotated 90° no signal reaches the receiver, it can be demonstrated that the horn antenna produces a field that oscillates in one direction only, i.e. the output is polarised.