Hazards Due To High-Energy Circuits; Rf Hazards; Mandatory Training - R&S N 8000 Series System Manual

If you have to perform any work on the RF circuit, isolate the antenna connector as well.
Caution! If other transmitters, etc, are in operation that are coupled to the same antenna
via RF filters, energy from them can be fed back via the antenna cable.
Never open a disconnected transmitter without taking protective measures against
touching voltage-carrying parts.
Due to the risk of electric shock from the AC supply voltage, never perform any electrical
operations when doors are open, front panels are unscrewed, plug-ins are withdrawn,
etc.
When electrical operations of the transmitter are performed for the purpose of internal
measurements or repair, label the workplace accordingly and provide warning about the
potential hazards in accordance with the basic rules of electrical engineering.
Appropriate measures have to be taken to prevent unauthorized persons from access-
ing this area.
After completing your work, close the transmitter and restore all safety measures for pre-
venting electric shock that have been provided by the manufacturer. Immediately make
sure that protective equipment (e.g. locks) is effective.
4.2

Hazards due to High-Energy Circuits

The instruments include low-voltage circuits which can be fed from an extremely low-imped-
ance voltage source(e.g. amplifier operating voltage). These circuits conduct dangerously
large amounts of energy. We handle these circuits in the same manner as circuits with volt-
ages that bear the risk of electric shock. They are usually covered and thus protected
against accidental contact. The cover comes with a warning label.
If you remove the cover of a transmitter that is in operation, there is the risk of both voltage
poles being short-circuited. Short circuits create an electric arc and thus can cause burns,
damage to the eyes as well as further injuries due to the state of shock response.
Practical experience has repeatedly shown that a short circuit caused by metal tools can
cause severe burns. For safety reasons, high-energy circuits are protected by covers and
are thus not accessible within the operator area of the instruments.
If you need to measure low-impedance voltages, during repair work or to optimize the
power consumption of the transmitter for example, exercise the same caution as when
measuring operating voltages that bear the risk of electric shock.
Wear protective clothing if necessary.
Before you open an instrument or remove its cover, switch off the operating voltage and
wait for five minutes to ensure that any and all capacitors are sufficiently discharged.
Do not short-ciruit capacitors to discharge them.
4.3

RF Hazards

4.3.1

Mandatory Training

Operators must instruct their personnel on how to use this transmitter or instrument in
accordance with EN 60215 and IEC 215. This periodic training must cover the radio-fre-
2098.1190.72
Chapter 1
- 1.6 -
Safety Instructions
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