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Longitudinal Balance Measurement Bridges

Product Announcement from North Hills Signal Processing Corporation


Longitudinal Balance Measurement Bridges-Image

LBB Series- Longitudinal Balance Measurement Bridges

Series LBB Longitudinal Balance Bridges are designed measure balance to ground of balanced systems, cables and components per ITU-T Recommendation O.9.

*North Hills Application Note 156 - "Measurement of Conversion Loss in Balanced Systems" provides further information on the subject of Balance to Ground and techniques for its measurement. Interfaced with a 50 ohm or 75 ohm Network Analyzer, LBB bridges measure the ratio of a common mode (longitudinal) applied signal to the transverse signal resulting from imperfect balance. Figures 2 and 3 on page 2 are test circuits for one-port and two-port balance measurements. The result of the one-port measurement is known as "Longitudinal Conversion Loss " (LCL) and that of the two-port measurement "Longitudinal Conversion Transfer Loss" (LCTL). Accessories are Test Terminations for bridge calibration (supplied) and Common Mode Signal Injectors for two-port balance measurements.

 

The LBB generator and monitor ports are industry standard female BNCs except for the 53XXX and 73XXX part numbers where J2 is an N-type plug. The balanced test terminals are sockets.

Features:

  • 60 dB Inherent minimum balance
  • Frequency range 0.01 to 300 MHz
  • 100, 110, 120, 135, or 150 ohm balanced outputs available

 

Benefits:

  • Ideal for UTP cable measurements
  • Easy interface with 50 ohm and 75 ohm network analyzers
  • Excellent balance across a broad frequency range
 
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