JPS5599079A - System for measuring line impedance - Google Patents
System for measuring line impedanceInfo
- Publication number
- JPS5599079A JPS5599079A JP694679A JP694679A JPS5599079A JP S5599079 A JPS5599079 A JP S5599079A JP 694679 A JP694679 A JP 694679A JP 694679 A JP694679 A JP 694679A JP S5599079 A JPS5599079 A JP S5599079A
- Authority
- JP
- Japan
- Prior art keywords
- line
- voltage
- resistor
- line impedance
- power source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
PURPOSE: To make it possible to measure a correct line impedance by supplying an AC voltage to a line to detect the phase difference between the same and the current flowing through the line.
CONSTITUTION: A line impedance 16 is excited by an AC power source 11 thourgh a resistor 12. The resistor 12 is for detecting the current flowing through the line as voltage drop at both ends of the resistor 12. When an AC voltage is supplied from the AC power source to the line. The voltage phase of the AC power source 11 and voltage phases at both ends of the resistor 12 are delivered respectively to a phase difference detecting circuit 15 in the form of rectangular waves through waveform shaping circuits 13 and 14, where the phase difference is detected thereby to measure a line impedance 16.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP694679A JPS5599079A (en) | 1979-01-23 | 1979-01-23 | System for measuring line impedance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP694679A JPS5599079A (en) | 1979-01-23 | 1979-01-23 | System for measuring line impedance |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5599079A true JPS5599079A (en) | 1980-07-28 |
Family
ID=11652390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP694679A Pending JPS5599079A (en) | 1979-01-23 | 1979-01-23 | System for measuring line impedance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5599079A (en) |
-
1979
- 1979-01-23 JP JP694679A patent/JPS5599079A/en active Pending
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