Atec Frankonia-RIS-3000 - Manual (Page 5)

RF-Field Strength Meter
A field strength meter is necessary for the measurement of the uniform area. It should be of small size
in order to avoid disturbances of the field by the physical size of the field strength meter itself. The
data transfer from the anechoic chamber to the control room should be via fibre optic link. It makes
sense to integrate the fibre optic converter directly into the sensor because long conductive cables
could influence the accuracy, too. The test frequency range from 80 MHz to 3 or 6 GHz should at least
be covered by the field strength meter. We suggest the use of our field strength meter type EFS-10/100
which works in the frequency range from 10 or 100 kHz up to 9.25 GHz and with a max. field strength
from 0.14 V/m to 500 V/m
Control Software CR-LAB and RF-Cabling
It is rather impossible to set all frequency steps and output levels of the signal generator manually.
Also the necessary recording of forward and reverse power as well as the EUT-monitoring would be
very time consuming. Not to mention the measurement of the uniform field and the calculation of
the forward power, which is needed for each frequency step at each test level. All that is done in
a very comfortable way by our control software CR-LAB. With CR-LAB you just select your start/step
frequency and your test level. Anything else is carried out by the software automatically.
The RF-cabling work is a very important part of a radiated immunity test system, as the cable-attenuation
could finally decide whether you reach your test level or not. All essential RF-cables are included in
our systems and in the calculation according to the required amplifier output power.
System installation in a 19”-Rack
RIS 3000 / RIS 6000
On request the test systems supplied are installed
into a 19”-rack. The picture on the left shows an
example of a radiated immunity test system acc. to
IEC/EN 61000-4-3, type RIS 3000.
RF-Relay Switching Unit RSU
In most cases two or three RF-power amplifiers and two different antennas are needed to cover the
whole test frequency range. It would be very time-consuming to change the cabling between the
different amplifiers, antennas and power meters manually. For this purpose software controlled
switching relays are used, as they work much faster and without any damage to the RF-cables, which
might be caused by changing the connections manually. Furthermore, cabling mistakes cannot occur.
Features:
• Moveable rack
(on big rubber wheels)
• Instruments are installed
into rack and cabled
• Main switch
• Easy mountable cover for front
and rear side of the rack included
• Typical dimesions (HxDxW):
1,270 x 710 x 540 mm
• Weight without instruments:
50 kg
Immunity Test System RIS 3000 / RIS 6000
acc. to IEC/EN 61000-4-3
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