3B SCIENTIFIC PHYSICS 1009950 Manual De Instrucciones página 9

1. Safety instructions
High frequency radio waves can penetrate bio-
logical tissues and cause them to heat up. The
microwave transmitter included here is suffi-
ciently low-powered that the hazards are negligi-
ble 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.

Before setting up or starting any experiments,
check the housing and mains lead for any
damage.

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 inadvertent 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 supervision 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 transmit-
ted and received.
The components and equipment included allow
for various experiments to be performed. These
can achieve both qualitative and quantitative re-
sults.
A narrow beam of electro-magnetic waves with
wavelength in the cm range can be output by a
transmitter 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 internal speaker, in which case the
loudness of the acoustic signal varies with the in-
tensity of the received 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 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): 170 x 200 x 75 mm
2
9.4 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
3