CN204330863U - Pointer multimeter detects high-frequency signal Mk - Google Patents
Pointer multimeter detects high-frequency signal Mk Download PDFInfo
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- CN204330863U CN204330863U CN201520035906.7U CN201520035906U CN204330863U CN 204330863 U CN204330863 U CN 204330863U CN 201520035906 U CN201520035906 U CN 201520035906U CN 204330863 U CN204330863 U CN 204330863U
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- frequency selective
- electric capacity
- frequency signal
- selective switch
- frequency
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Abstract
The utility model discloses a kind of pointer multimeter and detect high-frequency signal Mk, its feature comprises: frequency selective network, multiplication of voltage detection and filtering circuit, detection gauge outfit, frequency selective switch K1 selects double-point double-throw switch, detects gauge outfit and uses 1 piece of 500 type multimeter.Pointer multimeter described in the utility model detects high-frequency signal Mk and is provided with two grades of frequency selective switchs, the 500 type multimeter 2.5V voltage gears that choosing is commonly used are as quantitative instruction, it can be used for the intensity size measuring electronic equipment high-frequency signal, can measure the voltage of below 30MHz high-frequency signal, this attachment device can coordinate multimeter to measure the high-frequency oscillation voltage of the equipment such as radio, televisor, wireless remote control.The measurement result of high-frequency signal can meet general specification, and it has the advantages such as circuit structure is simple, measurement sensistivity is higher, stable work in work, cost of manufacture are low.
Description
Technical field
The utility model belongs to high frequency testing technical field, is to detect high-frequency signal Mk about a kind of pointer multimeter.
Background technology
Pointer multimeter measures alternating current internal circuit, it relates to some non-pure resistance elements, for example: the pointer coil of pointer gauge, so the calibration of pointer multimeter, what to use the alternating current of certain frequency and certain waveform as standard calibration, the reason of Here it is universal meter more adequately the measures sine wave alternating current of 50Hz, the signal voltage of below audio frequency measured at most by common multimeter, exceed this frequency too many, reading error will be larger.If measure the alternating current of its higher frequency and waveform with it, then how inaccurate reading is.
Instrument for measuring high-frequency signal strength has a variety of, although specialty is for measuring the instrument function admirable of high-frequency signal strength on market, there is price high, amateur unit or personnel are difficult to the defects such as acceptance.In order to make up and overcome these problems, develop that a kind of circuit structure is succinct, cost of manufacture is low, stable work in work and the high-frequency signal strength measurement mechanism of practicality is necessary.
Pointer multimeter described in the utility model detects high-frequency signal Mk and is provided with two grades of frequency selective switchs, the 500 type multimeter 2.5V voltage gears that choosing is commonly used are as quantitative instruction, do not need to do any change to 500 type multimeters, can be used for the intensity size measuring electronic equipment high-frequency signal, can measure the voltage of below 30MHz high-frequency signal, this attachment device can coordinate multimeter to measure the high-frequency oscillation voltage of the equipment such as radio, televisor, wireless remote control.The measurement result of high-frequency signal can meet general specification, and it has the advantages such as circuit structure is simple, measurement sensistivity is higher, stable work in work, cost of manufacture are low.
Below describe in detail pointer multimeter described in the utility model detect high-frequency signal Mk necessity involved in manufacturing process, guardian technique.
Utility model content
Goal of the invention and beneficial effect: the instrument for measuring high-frequency signal strength has a variety of, although specialty is for measuring the instrument function admirable of high-frequency signal strength on market, there is price high, amateur unit or personnel are difficult to the defects such as acceptance.In order to make up and overcome these problems, develop that a kind of circuit structure is succinct, cost of manufacture is low, stable work in work and the high-frequency signal strength measurement mechanism of practicality is necessary.
Pointer multimeter described in the utility model detects high-frequency signal Mk and is provided with two grades of frequency selective switchs, the 500 type multimeter 2.5V voltage gears that choosing is commonly used are as quantitative instruction, do not need to do any change to 500 type multimeters, can be used for the intensity size measuring electronic equipment high-frequency signal, can measure the voltage of below 30MHz high-frequency signal, this attachment device can coordinate multimeter to measure the high-frequency oscillation voltage of the equipment such as radio, televisor, wireless remote control.The measurement result of high-frequency signal can meet general specification, and it has the advantages such as circuit structure is simple, measurement sensistivity is higher, stable work in work, cost of manufacture are low.
Circuit working principle: pointer multimeter described in the utility model detects high-frequency signal Mk, after signal probe TX detects high-frequency signal, high-frequency signal, by multiplication of voltage detection and capacitor filtering, is become DC voltage and delivers to pointer multimeter DC voltage shift by faint HF voltage.Pointer multimeter described in the utility model detects high-frequency signal Mk and is provided with two grades of frequency selective switchs, and the 500 type multimeter 2.5V voltage gears that choosing is commonly used, as quantitative instruction, stir the frequency measurement scope that frequency selective switch K1 can change high-frequency signal.When measuring high-frequency signal, the magnitude of voltage of 500 type multimeter pointer instructions is less, illustrates that the intensity of tested high-frequency signal is less.
Technical scheme: pointer multimeter detects high-frequency signal Mk, and it comprises frequency selective network, multiplication of voltage detection and filtering circuit, detection gauge outfit, it is characterized in that:
Frequency selective network: it is made up of signal probe TX, electric capacity C1, electric capacity C2 and frequency selective switch K1, frequency selective switch K1 selects double-point double-throw switch, signal probe TX mono-termination capacitor C1 one end and electric capacity C2 one end, 1st pin of another termination frequency selective switch of electric capacity C1 K1-1,2nd pin of another termination frequency selective switch of electric capacity C2 K1-1, the 3rd pin of frequency selective switch K1-1 connects multiplication of voltage detection and filtering circuit;
Multiplication of voltage detection and filtering circuit: it is by germanium diode D1, germanium diode D2, electric capacity C3 and electric capacity C4 and frequency selective switch K1-2 forms, the model that germanium diode D1 and germanium diode D2 selects is 2AK20, the negative pole of germanium diode D1 and the positive pole of germanium diode D2 connect the 3rd pin of frequency selective switch K1-1, the positive pole connection circuit ground GND of germanium diode D1, 1st pin of electric capacity C3 mono-termination frequency selective switch K1-2, 2nd pin of electric capacity C4 mono-termination frequency selective switch K1-2, the electric capacity C3 other end and electric capacity C4 other end connection circuit ground GND, 3rd pin of frequency selective switch K1-2 connects the negative pole of germanium diode D2 and the black meter pen jack of 500 type multimeters, the red test pencil jack connection circuit ground GND of 500 type multimeters,
Detect gauge outfit and use 1 piece of 500 type multimeter.
Accompanying drawing explanation
Accompanying drawing 1 is that the utility model provides a pointer multimeter to detect the embodiment circuit working schematic diagram of high-frequency signal Mk; 3rd pin of frequency selective switch K1-1 is lever arm; The lever arm of the frequency selective switch K1 on accompanying drawing 1 is placed in high frequency measurement position.
Embodiment
High-frequency signal Mk circuit working schematic diagram and accompanying drawing explanation is detected according to the pointer multimeter shown in accompanying drawing 1, and according to annexation between components and parts in each several part circuit described in utility model content, and components and parts technical parameter described in embodiment requires and circuit production main points are carried out enforcement and can be realized the utility model, is further described correlation technique of the present utility model below in conjunction with embodiment.
Its technical parameter of components and parts and selection requirement
D1, D2 are germanium diode, and the model selected is 2AK20;
C1, C3 are ceramic disc capacitor, the magnetic medium electric capacity selected, and its capacity is 1000PF;
C2, C4 are electric capacity of the dacron, and its capacity is 0.22 μ F, withstand voltage for 63V;
K1 is frequency selective switch, selects double-point double-throw switch;
Detect gauge outfit and use 1 piece of 500 type multimeter.
Circuit production main points, circuit debugging and using method
Signal probe TX line adopts shielding line, and unsuitable oversize, and shell should use metal material;
The circuit structure detecting high-frequency signal Mk because of pointer multimeter is fairly simple, comparison is easy, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, and circuit of the present utility model does not substantially need to carry out any debugging and can normally work;
According to the frequency of measured signal, adjustment selected frequency selects K switch 1 position;
When measuring high-frequency signal, the magnitude of voltage of 500 type multimeter pointer instructions is less, illustrates that the intensity of the high-frequency signal of tested high-frequency signal is then less;
Proper use of pointer multimeter detects the size of high-frequency signal Mk and the tested high-frequency signal of correct interpretation, needs certain practice process, needs constantly to accumulate experience.
Circuit components layout of the present utility model, circuit structure design, its shape and size etc. of outward appearance are not all gordian techniquies of the present utility model; because not affecting the utility model specific implementation process; neither the claimed technology contents of the utility model, therefore do not illustrate one by one in the description.
Claims (1)
1. pointer multimeter detects a high-frequency signal Mk, and it comprises frequency selective network, multiplication of voltage detection and filtering circuit, detection gauge outfit, it is characterized in that:
Described frequency selective network is made up of signal probe TX, electric capacity C1, electric capacity C2 and frequency selective switch K1, frequency selective switch K1 selects double-point double-throw switch, signal probe TX mono-termination capacitor C1 one end and electric capacity C2 one end, 1st pin of another termination frequency selective switch of electric capacity C1 K1-1,2nd pin of another termination frequency selective switch of electric capacity C2 K1-1, the 3rd pin of frequency selective switch K1-1 connects multiplication of voltage detection and filtering circuit;
Described multiplication of voltage detection and filtering circuit are by germanium diode D1, germanium diode D2, electric capacity C3 and electric capacity C4 and frequency selective switch K1-2 forms, the model that germanium diode D1 and germanium diode D2 selects is 2AK20, the negative pole of germanium diode D1 and the positive pole of germanium diode D2 connect the 3rd pin of frequency selective switch K1-1, the positive pole connection circuit ground GND of germanium diode D1, 1st pin of electric capacity C3 mono-termination frequency selective switch K1-2, 2nd pin of electric capacity C4 mono-termination frequency selective switch K1-2, the electric capacity C3 other end and electric capacity C4 other end connection circuit ground GND, 3rd pin of frequency selective switch K1-2 connects the negative pole of germanium diode D2 and the black meter pen jack of 500 type multimeters, the red test pencil jack connection circuit ground GND of 500 type multimeters,
Described detection gauge outfit uses 1 piece of 500 type multimeter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201520035906.7U CN204330863U (en) | 2015-01-19 | 2015-01-19 | Pointer multimeter detects high-frequency signal Mk |
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CN201520035906.7U CN204330863U (en) | 2015-01-19 | 2015-01-19 | Pointer multimeter detects high-frequency signal Mk |
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CN204330863U true CN204330863U (en) | 2015-05-13 |
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CN201520035906.7U Expired - Fee Related CN204330863U (en) | 2015-01-19 | 2015-01-19 | Pointer multimeter detects high-frequency signal Mk |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104535823A (en) * | 2015-01-19 | 2015-04-22 | 吴圣铎 | Pointer multimeter adapter for detecting high-frequency signals |
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2015
- 2015-01-19 CN CN201520035906.7U patent/CN204330863U/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104535823A (en) * | 2015-01-19 | 2015-04-22 | 吴圣铎 | Pointer multimeter adapter for detecting high-frequency signals |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20160119 |
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EXPY | Termination of patent right or utility model |