GB839062A - Signal amplitude analyzer - Google Patents
Signal amplitude analyzerInfo
- Publication number
- GB839062A GB839062A GB2854/58A GB285458A GB839062A GB 839062 A GB839062 A GB 839062A GB 2854/58 A GB2854/58 A GB 2854/58A GB 285458 A GB285458 A GB 285458A GB 839062 A GB839062 A GB 839062A
- Authority
- GB
- United Kingdom
- Prior art keywords
- percentage
- voltage
- signal
- time
- potentiometer
- 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
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
839,062. Voltage measurement. COLLINS RADIO CO. Jan. 28, 1958 [April 8, 1957], No. 2854/58. Class 37. In an arrangement for analysing variations in the amplitude of a signal which may be the A.V.C. voltage of a radio receiver being used for a field strength survey, either an indication of the amplitude exceeded by the signal for a predetermined percentage of the time or the percentage of time that the signal exceeds a preselected amplitude, or both is continuously generated. The signal which is applied to a terminal 58, Fig. 2, of a chopper 11 vibrated at 400 cycles per sec. and a reference voltage applied at terminal 59 produce, when they differ, a square wave output which is amplified and applied over a transformer 33 to a comparator comprising valves 13a, 13b wherein the phase relative to a 400-cycle supply synchronous with that driving chopper 11 is detected to energize coil 35 or 36 of a relay 14 according to whether the input voltage is above or below the reference. Voltages applied to the contacts 37, 38 of the relay for pick-up by the tongue are preselected by potentiometer 15 and are of such a ratio to give a required charge/discharge ratio to condenser 42, Fig. 3, of the integrator circuit to which the relay output is applied, whereby a voltage sufficient to actuate relays 20, 21 in later stages, is developed only if the percentage of time which the signal exceeds the reference varies from the percentage set by the potentiometer 15, for which a graph is to be traced. The relays 20, 21 are actuated through a further chopper 17 and phase detector 19 energized from a 60-cycle supply, and drive a bi-directional slipping switch 22 in one direction or the other respectively, to change the reference voltage from a potentiometer 23 to a new value whereat the percentage of time it is exceeded corresponds to that required. A punched card information switch 24 and an automatic timer or recorder are also driven by switch 22. The relays 20, 21 are arranged to short the condenser 42 on each actuation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US839062XA | 1957-04-08 | 1957-04-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB839062A true GB839062A (en) | 1960-06-29 |
Family
ID=22181412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2854/58A Expired GB839062A (en) | 1957-04-08 | 1958-01-28 | Signal amplitude analyzer |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB839062A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3465247A (en) * | 1964-12-25 | 1969-09-02 | Tokyo Shibaura Electric Co | Apparatus for automatically statistically analyzing signals having fluctuating portions and steep slope portions |
-
1958
- 1958-01-28 GB GB2854/58A patent/GB839062A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3465247A (en) * | 1964-12-25 | 1969-09-02 | Tokyo Shibaura Electric Co | Apparatus for automatically statistically analyzing signals having fluctuating portions and steep slope portions |
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