Type 4284
COAXIAL BOARD Type 4284
Type 4284 is a training board for experiments with shielded lines. The 50 m line, adjustable termination and display elements make standing waves, attenuation and reflections immediately visible.
- Training board for shielded lines
- 50 m line split into two 25 m sections
- Adjustable terminating resistor
- Display elements for standing waves
- Multiple boards can be cascaded
- Suitable for RF and line experiments
Line experiments
The board makes it possible to study the characteristics of a shielded line and its frequency behaviour. Attenuation, input resistance, standing waves and the shortening factor can all be observed directly on the setup.
The built-in line section is also suitable for fault location and impulse behaviour experiments.
Lab operation
The module is intended for use with an oscilloscope and function generator. Its cascading design makes it possible to examine longer line sections and different termination conditions.
The built-in LEDs help to observe standing waves and reflected signals.
- Line
- 50 m total, split into 2 x 25 m
- Ohmic resistance
- 300 Ohm/km
- Inductance
- 0.4 uH/m
- Characteristic impedance
- 50 Ohm +/- 2 Ohm
- Capacitance
- 100 pF/m
- Terminating resistor
- 0 ... 470 Ohm, continuously adjustable
- Measurement shunt
- 1 Ohm for current measurement
- Dimensions
- 133 x 297 x 110 mm
- Weight
- 1.25 kg
- Recommended accessories
- Experiment manual V 0135, oscilloscope and function generator
- Introduce line characteristics
- Measure attenuation along the line
- Study line frequency dependence
- Measure input resistance at open circuit, short circuit and matched load
- Investigate standing waves
- Determine propagation velocity and shortening factor
- Locate faults with the RF method
- Study impulse behaviour of the line
- Perform impulse reflectometry
- Vary matching and reflections
