GB1517110A - Frequency spectrum analysis equipment - Google Patents

Frequency spectrum analysis equipment

Info

Publication number
GB1517110A
GB1517110A GB4964276A GB4964276A GB1517110A GB 1517110 A GB1517110 A GB 1517110A GB 4964276 A GB4964276 A GB 4964276A GB 4964276 A GB4964276 A GB 4964276A GB 1517110 A GB1517110 A GB 1517110A
Authority
GB
United Kingdom
Prior art keywords
receiver
change
rate
bandwidth
tuning
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
Application number
GB4964276A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1517110A publication Critical patent/GB1517110A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/16—Spectrum analysis; Fourier analysis
    • 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
    • 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
    • G01R27/30—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response with provision for recording characteristics, e.g. by plotting Nyquist diagram

Abstract

1517110 Radio receiving systems SIEMENS AG 29 Nov 1976 [28 Nov 1975] 49642/76 Heading H3Q In a frequency spectrum analysis equipment a receiver 1 has an adjustable bandwidth (fu-fo, Fig. 2 not shown) which can be switched over in steps from an initially large bandwidth (B0) to successively smaller bandwidths (B1, B2) the rate of change of the frequency settings is initially rapid, until a received signal (Ux) is detected having an amplitude of a certain amplitude, then a comparator 4 causes a control device such as a computer 5 to set the bandwidth at a narrower value (B1) and also retraces a given frequency range at a slower rate of change of the receiver tuning. The subsequent received signal, if any, causes a further reduction of band width (B2) and rate of change of tuning to occur and a recording or display device 8 is automatically connected such as by a gate 7 to the output of the receiver. The control device 5 then automatically reverts to the initial bandwidth and rate of change of tuning control when the receiver output falls below a given value. The output of the receiver provides amplitude information of the received signals and is fed to a chart recorder or c.r.t. beam defection circuit 8. The receiver 1 is tuned over the range fu-fo by a frequency synthesizer 3 under control of the computer 5. In a modification (Figs. 3 and 4, not shown) the synthesizer 3 is replaced by an oscillator (14) controlled by a function generator (13) and digital operating comparator 4 is replaced by an analogue operating comparator (20).
GB4964276A 1975-11-28 1976-11-29 Frequency spectrum analysis equipment Expired GB1517110A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752553705 DE2553705B1 (en) 1975-11-28 1975-11-28 CIRCUIT ARRANGEMENT FOR FREQUENCY-SELECTIVE EVALUATION OF THE AMPLITUDES OF ONE OR MORE SIGNALS

Publications (1)

Publication Number Publication Date
GB1517110A true GB1517110A (en) 1978-07-12

Family

ID=5962995

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4964276A Expired GB1517110A (en) 1975-11-28 1976-11-29 Frequency spectrum analysis equipment

Country Status (3)

Country Link
DE (1) DE2553705B1 (en)
FR (1) FR2333385A1 (en)
GB (1) GB1517110A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4780669A (en) * 1985-03-22 1988-10-25 Siemens Aktiengesellschaft Method and arrangement for evaluating a test voltage by means of a bandwidth-limited evaluation circuit

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630221B1 (en) * 1978-03-14 1991-01-25 Thomson Csf SPECTRAL ANALYSIS DEVICE AND AUTOMATIC INTERCEPTION RECEIVING STATION COMPRISING SUCH A DEVICE
JPS5955523A (en) * 1982-09-24 1984-03-30 Advantest Corp Signal generator for digital spectrum analyzer
EP0196534A1 (en) * 1985-03-22 1986-10-08 Siemens Aktiengesellschaft Method and device making use of it to determine the signal frequencies at at least one point of a sample with the use of a scanning microscope
US4689555A (en) * 1985-03-22 1987-08-25 Siemens Aktiengesellschaft Method for the determination of points on a specimen carrying a specific signal frequency by use of a scanning microscope
DE3531129A1 (en) * 1985-08-30 1987-03-12 Siemens Ag METHOD AND ARRANGEMENT FOR OPERATING A RASTER MICROSCOPE
DE4027956A1 (en) * 1990-09-04 1992-03-05 Rohde & Schwarz METHOD FOR MEASURING AND REPRESENTING FREQUENCY-DEPENDENT MEASUREMENT PARAMETERS OF A MEASURED OBJECT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4780669A (en) * 1985-03-22 1988-10-25 Siemens Aktiengesellschaft Method and arrangement for evaluating a test voltage by means of a bandwidth-limited evaluation circuit

Also Published As

Publication number Publication date
DE2553705B1 (en) 1977-03-31
FR2333385A1 (en) 1977-06-24

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee