CN2308901Y - Special measurer for CATV cable central power supply - Google Patents
Special measurer for CATV cable central power supply Download PDFInfo
- Publication number
- CN2308901Y CN2308901Y CN 97238896 CN97238896U CN2308901Y CN 2308901 Y CN2308901 Y CN 2308901Y CN 97238896 CN97238896 CN 97238896 CN 97238896 U CN97238896 U CN 97238896U CN 2308901 Y CN2308901 Y CN 2308901Y
- Authority
- CN
- China
- Prior art keywords
- power supply
- catv cable
- alternating
- sent
- current
- 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 - Fee Related
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a special measurer for CATV cable concentrated power supply. When high frequency signals and alternating current are simultaneously input from an input end of the special measurer for CATV cable concentrated power supply, one path is directly sent to an output end through an inductor. The high frequency signals in the other path is sent to a measuring end through a capacitor; alternating-current voltage is respectively sent to an alternating-current voltmeter and a light emitting diode, and thus, voltage and electric level of the measuring point can be measured. Since the capacitor causes the alternating current to be isolated, and accordingly, an isolator can play functions of protecting a field-intensity meter.
Description
The utility model relates to a kind of CATV cable centrally connected power supply special measurement device.
No matter large, medium and small cable television system all has suitable concentric cable trunk, adopt centrally connected power supply simultaneously, so every main line of each system must often be debugged and be keeped in repair all.Measure and earlier alternating voltage to be kept apart with existing measuring appliance, if run into the amplifier no-output, power light does not work and can't determine that it still is that amplifier at the corresponding levels is out of order that previous stage is not powered, simultaneously the maintenance personal to measure alternating current with multimeter in the air at height not only dangerous but also inconvenient.
The purpose of this utility model provides a kind of CATV cable centrally connected power supply special measurement device, and it only need receive the input end of trunk amplifier, just can know the alternating voltage and the level situation of measurement point at a glance.
The utility model is by two inductance L
1, L
2, a resistance R, a light emitting diode LEO, an A.C. voltmeter and an electric capacity constitute.
When high-frequency signal, alternating current were sent into input end simultaneously, the inductance of leading up to was directly delivered to output terminal.High-frequency signal in another road is delivered to measuring junction by electric capacity, and alternating voltage is then delivered to A.C. voltmeter and light emitting diode respectively, can record the voltage and the level of this measurement point like this.Because electric capacity is isolated alternating current, play the effect of protection field intensity meter so be equivalent to isolator again.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is an outside drawing of the present utility model.
1, input end 2, inductance 3, output terminal 4, measuring junction
5, electric capacity 6, A.C. voltmeter 7, light emitting diode 8, resistance
When frequency range when the alternating voltage of the high-frequency signal of 45-1000KHz and 0-60V is sent into input end 1 simultaneously, the inductance 2 of two 5.6 μ H of leading up to is sent into output terminal 3.High-frequency signal in another road is delivered to measuring junction 4 by the electric capacity 5 of 103P/1KV, can record the level of this measurement point; Alternating voltage divides two-way again, and one the road delivers to the voltage that A.C. voltmeter 6 promptly records this measurement point, and light emitting diode 7 is delivered to by the resistance 8 of a 2.2K Ω in another road.Electric capacity 5 is isolated alternating current, is equivalent to isolator so again and plays the effect of protection field intensity meter.
The utility model is simple in structure, makes easily, and purposes is many, and is safe and convenient to use.
Claims (1)
1, the utility model discloses a kind of CATV cable centrally connected power supply special measurement, it is characterized in that: it is by two inductance L
1, L
2, a resistance R, a light emitting diode LEO, an A.C. voltmeter and an electric capacity constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97238896 CN2308901Y (en) | 1997-09-15 | 1997-09-15 | Special measurer for CATV cable central power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97238896 CN2308901Y (en) | 1997-09-15 | 1997-09-15 | Special measurer for CATV cable central power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2308901Y true CN2308901Y (en) | 1999-02-24 |
Family
ID=33949070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97238896 Expired - Fee Related CN2308901Y (en) | 1997-09-15 | 1997-09-15 | Special measurer for CATV cable central power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2308901Y (en) |
-
1997
- 1997-09-15 CN CN 97238896 patent/CN2308901Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |