Atec Frankonia-RIS-3000 - Manual (Page 3)

Main characteristics
• Type: Frankonia FLH, FLG,
• Frequency range: 1 MHz- 6 GHz
• Nominal output: 4 W … 2000 W
• Input for nominal output:
107 dBµV (0 dBm)
• Impedance: 50
Ω
RF-Power Amplifier
The software controls the level of the signal generator
output for each test frequency. This signal level is
amplified by the power amplifier output in order to
generate the required test field strength around the
EUT. It depends on the testing setup, the distance
between EUT and antenna (1 m - 3 m) and the test
level / test field strength (1 V/m, 3 V/m, 10 V/m or
special requirements) whether an amplifier output
of 10 W, 30 W, 200 W - 2 kW is required. Normally,
field strength of 10 V/m, with 1 kHz / 80% AM, can
be obtained with a 200 W amplifier in a testing
distance of 3 m.
RF-Power Meter / Directional Couplers
While testing the field strength probe is replaced by the EUT. A power measurement during the test
runs assures that the EUT is actually exposed to the requested test condition. Thus a directional coupler
is connected with the amplifier output. A power measuring device type PMS 1084 determines the
forward and reverse power up to 6 GHz. Both are stored and recorded by the control software. For
this purpose directional couplers are connected with the amplifier output or the built-in directional
couplers of our EMC test & control unit ECU-3/-6 is used. The forward and reverse power is measured
by our RF-Power Meter PMS 1084 or by the built-in power measuring channels of the ECU-3/-6.
Both metering values are recorded and stored by the control software CR-LAB.
Transmitting Antenna(s)
Broadband antennas, like our model AXL-4000, which cover the whole frequency range from 80 MHz
up to 4 GHz may be used as a single-antenna-solution. The advantage of these antennas is that they
can be used for immunity tests as well as for emission measurements. In order to save amplifier power
and costs it is recommended to use so called double stacked log.-periodical antennas for immunity
tests, like our model AXL-80. This antenna type offers a much higher gain compared to the above
described broadband antennas. For our systems we recommend the following antenna types:
• 30 MHz – 4 GHz, type ALX-400
• 80 MHz – 4 GHz, type AXL-80
• 1 GHz – 6 GHz, type MAX-9
As an alternative horn antennas can be used in the GHz range if a max. uniform area of 1.0 m is
sufficient.
MAX-9
AXL-80
Immunity Test System RIS 3000 / RIS 6000
acc. to IEC/EN 61000-4-3
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