Transmission Lines Unit

The Transmission Lines Unit, to study a standardized coaxial line to analyze realistic measurements. The unit is fully provided with a set of practices that allow the student to study and to understand the diverse techniques to testing the signal transmission in a line (in steady-time and in time domain) and the techniques to characterize a transmission line (mismatches, variation of impedances, discontinuities, etc).

ATENG 10957 — Transmission Lines Unit

All elements are mounted in a metallic box, with power supply and block diagrams.

• Signal generators blocks:
• Square signal generator block:
• Amplitude: +12 V.
• Frequency range: 1 Hz to 50 KHz.
• Sine signal generator block:
• Amplitude: ± 2.5 V.
• Frequency range: 1 Hz to 100 KHz.
• Triangle signal generator block: ATENG 10957 detail
• Amplitude: ± 2.5 V.
• Frequency range: 1 Hz to 100 KHz.
  Each signal generator contains an encoder to change the signal frequency and four BNC connectors with different output impedance.
• Transmission lines block:
  Two transmission lines.
  Two BNC connectors for each transmission line.
  Five test points along of each transmission line. The first and the last test point are straight connected with the BNC connectors and there
  is 10 m of coaxial cable between test points.
  40 m of RG-174 coaxial cable in each line, a total of 80 m in the two lines.
• Load block:
• Type of loads: resistive, inductive and capacitive loads.
• First group of loads:
  1 KΩ potentiometer.
  33 Ω resistance.
  1 nF capacitor.
  4.7 µH inductance.
  Short circuit/open circuit.
• Second group of loads:
  1 KΩ potentiometer.
  50 Ω resistance.
  10 nF capacitor.
  4.7 µH inductance.
  Short circuit/open circuit.
  Switches to connect and disconnect each load.
  Three BNC connectors.
  Cables and accessories, for normal operation.