System Setup - 3B SCIENTIFIC PHYSICS U8493600-230 Mode D'emploi

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 cor-
rectly.
Safe operation of the equipment is guaranteed, pro-
vided it is used correctly. However, there is no guar-
antee of safety if the equipment is used in an im-
proper or careless manner.
•
Before setting up or starting any experiments,
check the housing and mains lead for any dam-
age.
•
If it is deemed that the equipment can no longer
be operated without risk (e.g. visible damage has
occurred), the equipment should be switched off
immediately and secured against any inadver-
tent use.
•
The transmitter is only permitted to be con-
nected to 3B-ELWE control unit.
•
In schools and educational establishments, the
equipment may only be operated under the su-
pervision of trained personnel.
•
Avoid looking directly into the antenna horn of
the transmitter or the reflected beam.
•
Only trained electricians are permitted to open
up the apparatus' housing.
2. Description
This apparatus allows microwaves to be transmitted
and received.
The components and equipment included allow for
various experiments to be performed. These can
achieve both qualitative and quantitative results.
A narrow beam of electro-magnetic waves with wave-
length in the cm range can be output by a transmit-
ter and picked up using the horn antenna (19) or the
sensor probe (21). The modulation of the receiver
signal can be rendered audible by means of an in-
ternal speaker, in which case the loudness of the
acoustic signal varies with the intensity of the re-
ceived signal.
The microwave apparatus is powered via a 12-V AC
plug-in power supply.
The microwave apparatus 10.5 GHz (1009950) is for
operation with a mains voltage of 115 V (±10 %), and
the microwave apparatus 9.4 GHz (1009951) is for
operation with a mains voltage of 230 V (±10 %).
3. Contents
1 Control unit
1 Transmitter with horn antenna
1 Receiver with horn antenna
1 Microwave probe
1 Mikrowave bench, 800 mm
1 Microwave bench, 400 mm with plate holder
1 Reflection plate 180 x 180 mm²
1 Polarisation grating, 180 x 180 mm²
1 Absorption plate, fibreboard, 180 x 180 mm²
1 Paraffin prism
1 Stand for prism
1 Plate with double slit
1 Cover plate for double slit
1 Instruction sheet
4. Technical data
Transmitter with horn antenna:
Frequency of oscillator:
Transmitted power:
Modulation type:
Modulation signal:
Internal modulation:
External modulation:
Acoustic signal:
Output voltage:
Receiver with horn antenna:
Microwave probe:
Supply voltage:
Dimensions (control unit):
5.1 Set-up of base rails (basic set-up)
•
Insert the central screw under the scale disc in
the hole in the long rail.
The default set-up is with the rails opened out in a
line (the arrow on the long rail points to "0°" on the
protractor scale.
•
Move the articulated base so that the pointer
coincides with the zero point of the scale.
The pointer is aligned with the normal of the screen
holder and thus allows the angle of incidence to be
read off or adjusted directly (read off the outer nu-
meric scale).
5.2 System set-up
•
Connect to the mains.
•
Connect the receiver with horn antenna or the
microwave probe to the receiver terminal (1).
•
Connect the transmitter with horn antenna to
the transmitter terminal (4).
•
Set up the transmitter and receiver on the base
rails as appropriate to the experiment.
•
Set the controller for the signal gain of the
speaker (9) to its centre position.
•
Use the switch (8) to turn on the speaker.
2
9,5 GHz (1009951)
10,5 GHz (1009950)
10 mW to 25 mW
AM
Selector switch
Internal/off/external
3kHz approx.
80% AM approx.
100 Hz to 20 kHz,
max. 1 V
internal (switchable)
10 V max.
Silicon diode with
resonator
Silicon diode with
resonator
12 V AC via plug-in
supply
170 x 200 x 75 mm
5. Operation
3