Development System Disturbance Emission ESA 1

GP 23 Base plate 

Dimensions: 900 x 500 mm
Valid for the installed filters:

• max. continuous current: 10 A
• max. operating voltage: 50 V

The GP 23 metal base plate is the reference plate for the measurement set-up. It contains the filters to supplying the unit under test and pre-amplifier as well as the output of the latter.The nickel-plated surface ensures a steady and reliable conductive connection to the HFW 21 RF current transformer or HFA 21 RF bypass.

Z21 Shielding tent

Dimensions: 900 x 500 x 400 mm

The shielding tent has been designed to shield the measurement set-up against external RF fields. In case of problems in the VHF range or particularly high demands on the unit under test as in the automobile industry, for instance, a conductive housing has to be used as a shield against ambient disturbance field. The front of the shielding tent can be opened separately to ensure quick alternation between measuring and modifying. You can tilt the whole tent backward for ease of accessibility.

HFW 21 RF current transformer 

Measuring range: 100 kHz - 1 GHz
max. continuous current: 10 A
max. operating voltage: 50 V
Dimensions: 135 x 32 x 28 mm

The RF current transformer measures high-frequency currents of up to 1 GHz on lines and diverts these currents to the base plate. It´s connected with the amplifier and The RF current transformer enables separate measurements of RF common-mode and differential-mode currents.

HFA 21 RF bypass

Capacity: 10 pF - 100 nF
max. operating voltage: 50 V
Dimensions: 70 x 50 x 18 mm

The RF bypass supplements the RF current transformer by providing another capacitive or conductive connection from the unit under test to the GP 23 base plate if necessary.It is mainly used to simulate the data lines connected in normal operation and their capacitance relative to the surroundings. The HFA 21 contains capacitances and defined RF currents can thus be diverted to the base plate.

Near Field Probes

You will find the descriptions of the characteristics of the single probes under  near field probes type RF.

ESA 1 contains 11 various near field probes for measuring high-frequency magnetic and electric fields.The probes are connected to the preamplifier instead of the HFW 21 and enable measurements in the area of the module, on tracks and components. The aim is to find the RF field sources on the module in the unit under test and to detect and understand the respective emission mechanisms.

Correction characteristics for RF magnetic field probes