GB848088A - Improvements in or relating to circuit arrangements for indicating the characteristic curves of filters and like networks - Google Patents
Improvements in or relating to circuit arrangements for indicating the characteristic curves of filters and like networksInfo
- Publication number
- GB848088A GB848088A GB11384/57A GB1138457A GB848088A GB 848088 A GB848088 A GB 848088A GB 11384/57 A GB11384/57 A GB 11384/57A GB 1138457 A GB1138457 A GB 1138457A GB 848088 A GB848088 A GB 848088A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- voltage
- oscillator
- oscilloscope
- mains
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/28—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response
- G01R27/32—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response in circuits having distributed constants, e.g. having very long conductors or involving high frequencies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
848,088. Frequency measurement, impedance measurement. PHILIPS ELECTRICAL INDUSTRIES Ltd. April 8, 1957 [April 11, 1956], No. 11384/57. Class 37 In a circuit for displaying on an oscilloscope the frequency response curve 12 of an electrical network 7, a main oscillator 1 applies to the network a high-frequency voltage the frequency of which is periodically varied over the band for which the response curve is required, the output of the network being applied to the oscilloscope in conjunction with a signal indicative of the instantaneous frequency of the main oscillator; and an auxiliary oscillator 2 applies to tuned circuits 10 of a frequency marking system a lowfrequency voltage the frequency of which is peripdically varied in synchronism with that of the main oscillator over a band which includes the tuned frequencies of the tuned circuits thereby generating output pulses at instants when the high-frequency voltage passes through preselected frequencies, such pulses being applied to the oscilloscope to produce frequency marks. The main sweep oscillator comprises valves 20, 21, capacitor 24, and coil 3; the output thereof, having a mid-frequency of 40 mc/s, is fed to the test network 33, e.g. an intermediate frequency band-pass filter, and the resultant voltage to be examined, e.g. the primary voltage, is supplied, through rectifier 34, to the Y plates of the oscilloscope, the horizontal deflection of which is A.C. mains controlled. The auxiliary sweep oscillator comprises valves 22, 23, capacitor 25, and coil 4; the output thereof, having a midfrequency of 0À5 mc/s, is fed to the grid of a triode 40 in each of three or more similar circuits 37, 38, 39 which together constitute a frequency marking system; the anode circuit of each valve 40 includes an inductance-capacitance resonant circuit, 41, 42, 43, tuned so that its resonant frequency corresponds to a required frequency mark, and the frequency marker pulses respectively developed across these resonant circuits are supplied, after rectification and amplification, to the brightness control of the oscilloscope to produce bright spots on the trace at points corresponding to preselected frequencies of the main oscillator. Alternatively, the marker pulses may be fed to the Y-plates of the oscilloscope to vertically deflect the trace at these same frequencies. Both the main and auxiliary oscillator frequencies are swept in synchronism by mounting their respective coils 3, 4 on a ferrite rod 5 carrying a magnetizing coil 6 energized by the A.C. mains which also supplies the oscilloscope X-plates, the main oscillator being varied through Œ 4 mc/s per half period. The magnetizing coil 16 is supplied with a sinusoidal voltage from a mains excited phase shifter 28, and a direct voltage from a mains energized rectifier 27. The network frequency response curve is recorded during one half of each sweep cycle, and the frequency axis is recorded during the other half by supplying the output pulses of a square-wave generator, comprising a valve 48 overdriven by a 50 c/s voltage, to the grids of oscillator valves 20, 21, 22, 23, thus preventing oscillation during half of each period of the 50 c/s mains sweep voltage.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE848088X | 1956-04-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB848088A true GB848088A (en) | 1960-09-14 |
Family
ID=6775502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11384/57A Expired GB848088A (en) | 1956-04-11 | 1957-04-08 | Improvements in or relating to circuit arrangements for indicating the characteristic curves of filters and like networks |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB848088A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2154752A (en) * | 1984-01-09 | 1985-09-11 | Hewlett Packard Co | Vector network analyzer with integral processor |
CN108872793A (en) * | 2018-07-19 | 2018-11-23 | 西安交通大学 | DC suppling network remote station ground state detection method based on frequency sweep curve |
-
1957
- 1957-04-08 GB GB11384/57A patent/GB848088A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2154752A (en) * | 1984-01-09 | 1985-09-11 | Hewlett Packard Co | Vector network analyzer with integral processor |
US4661767A (en) * | 1984-01-09 | 1987-04-28 | Hewlett-Packard Company | Vector network analyzer with integral processor |
CN108872793A (en) * | 2018-07-19 | 2018-11-23 | 西安交通大学 | DC suppling network remote station ground state detection method based on frequency sweep curve |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2178471A (en) | Device for oscillographing | |
US2534957A (en) | Response curve indicator | |
US2189457A (en) | Method and means for electrical testing | |
US2630472A (en) | Method and apparatus for inspecting cavities | |
GB848088A (en) | Improvements in or relating to circuit arrangements for indicating the characteristic curves of filters and like networks | |
US2747095A (en) | Translation of electrical reactance values | |
US3017571A (en) | Device for testing reactances | |
US2610228A (en) | Marker signal generator | |
US2297436A (en) | Arrangement for testing the frequency characteristic of electric transmission devices | |
US3044290A (en) | Mechanical resonance indicators | |
US2448794A (en) | Device for testing magnetic materials | |
US2162335A (en) | Vacuum tube sweep circuit | |
US2249649A (en) | Fatigue testing apparatus | |
US2478773A (en) | Magnetic measuring device and method | |
US2766381A (en) | Marker signal generator | |
US2467124A (en) | Electronic point inspection | |
US2140395A (en) | Testing of electric circuits | |
GB454059A (en) | Improvements in or relating to electric discharge tube oscillation generators | |
US1867131A (en) | Method of and apparatus for testing condensers | |
GB620757A (en) | Improvements in or relating to apparatus for measuring mutual conductance | |
GB681779A (en) | Improvements in and relating to apparatus for and method of testing wire insulation | |
GB503893A (en) | System employing cathode ray oscillographs | |
Harvey | Output and efficiency of the split-anode magnetron oscillating in the dynatron regime | |
GB546754A (en) | An improved means for enabling a direct-current voltage proportional to a frequency to be obtained | |
George et al. | A cathode ray oscillograph for observing 2 waves |