Electromagnetic Compatibility; Safety Notes - LD 587 551 Manual De Instrucciones

06/05-W97-Hh

Electromagnetic compatibility

The UHF generator is classified as an educational device for
studying electromagnetic phenomena. It is used to investigate
the propagation of electromagnetic waves in space and on
Lecher lines.
Experiment setups using the UHF generator may not always
conform to the limit values of class A (group 2 of standard EN
55011). Such setups may cause interference in other devices
in the experiment room of a school or educational institution;
the proper function of devices situated outside of the experi-
ment room is generally not affected. However, radio interfer-
ence can occur up to a distance of several hundred meters,
especially blocking remote controls.
The UHF generator may only be operated under the supervi-
sion of qualified personnel, e.g. a teacher, and may not be
operated at all outside of the designated experiment room of a
school or other institution. The UHF generator may not be con-
nected to other communications systems or terminal devices.
Instruction sheet 587 551
UHF generator (587 551)

Safety notes

It is the responsibility of the user to take all precautions to
ensure that devices installed outside of the experiment
room can continue to function properly.
• Do not operate the generator longer than is necessary to
conduct the experiment.
• Set up the experiment horizontally (not vertically).
• Where necessary, also operate the UHF generator at
reduced power for continuous wave experiments (Ampli-
tude control input).
The UHF generator is ready for operation and emits high-
frequency energy as soon as it is connected to the supply
voltage.
• Deactivate the UHF generator immediately when the
experiment is finished by disconnecting the table-top
power supply.
The output amplifier of the UHF generator is proof against
sustained short-circuit and no-load operation and can with-
stand mismatches up to a standing wave ratio of 20:1. In
spite of this, always avoid sustained extreme mismatches.
• Never operate the UHF generator without terminating the
antenna output with the loop dipole, the Lecher line or
the 200 Ω terminator resistor.