JPH0414326A - Concentrated monitoring system for bidirectional catv transmission network - Google Patents

Abstract

PURPOSE:To allow the manager to correct the operation of a faulty amplifier by only inputting a correction data with an external input device in a CATV transmission network. CONSTITUTION:The operating state of an amplifier 11a is measured by the detection circuit of a detector 12a. The data is sent to a concentrated monitoring device 13 as incoming signals x1, x2 through a CPU 22, a modulation circuit 23 and a bidirectional filter 24. The arithmetic processing based on a preset normal amplified data is carried out and whether or not the state data of the amplifier 11a sent from the detector 12a is abnormal is decided. The alarm is displayed on a display device 14 when the data is not normal. The manager observing the display uses an external input device 32 to input an amplifier correction data, which is sent to the CPU 22 of the detector 12a as outgoing signals y1-y3. The CPU 22 gives the correction command signal to an adjustment circuit 31 to adjust the amplifier 11a into the normal operating state. By this constitution, the manager carries out the maintenance and inspection in a latch.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application]
The present invention relates to a centralized monitoring system for a bidirectional CATV transmission network that monitors the operating status of various transmission equipment in a transmission network.

[Prior Art] Generally, in a two-way CATV transmission network, a centralized monitoring system is utilized as a means for monitoring the status of transmission lines.

Figure 2 shows the configuration of a conventional centralized monitoring system.
In the figure, lla, llb, . . . are amplifier devices, 1
2a, 12b, . . . are the amplifier devices 12, respectively.
a, 12b, . . . Detection device for detecting the operating state; 1;
3 is a centralized monitoring device installed on the administrator side of the CATV transmission network; 14 is a display device that displays the monitoring status;
Reference numeral 5 denotes a directional coupler for branching signals from the central monitoring device 13 to the coaxial line 16 as a transmission main line.

That is, each amplifier 11a on the coaxial line 16.

The signal amplification state by the amplifiers 11a, llb, .
a, 12b, . . . and this amplification operation detection signal is transmitted to the central monitoring device 13 as an upstream signal As a result, the display device 14
, each amplifier 11a.

The operating status of 11b, . . . is now displayed.

FIG. 3 shows the internal configuration of the amplifying device 11a and the detecting device 12a in the conventional centralized monitoring system.
1 is a detection circuit that detects the operating state of the amplifier 11a; 2
2 is a CPU circuit that converts the detection result into information, 23 is a double modulation circuit that modulates and outputs the information signal, and 24 is a bidirectional filter that limits the modulated signal to a specific band and outputs it.
25 is a directional coupler that transmits the filter output onto the coaxial line 16.

That is, the detection circuit 21 measures and detects the operating state of the amplifier 11a, such as signal strength, voltage value, current value, switch open/close state, etc., and sends the state detection signal to the CPU.
When sent to the circuit 22, the CPU circuit 22 sends an information signal corresponding to the detection state from the modulation circuit 23 to the central monitoring device 13 through the filter 24 as an upstream signal X l + X 2.

Then, the central monitoring device 13 performs arithmetic processing on the status signal of the amplifier 11a obtained from the detection device 12a based on a preset normal value, and determines whether the amplifier 11a is in a normal operating state. Determine.

As a result, the display device 14 displays the state determination data of the amplifier device 11a.

[Problems to be Solved by the Invention] However, in the conventional centralized monitoring system described above, the operating state of each amplifier 11a, llb, . . . detected by the detection devices 12a, 12b, .
The state is determined through 3 and displayed on the display device 14.
Since there is only a one-sided flow of status information, if the display device 14 displays a warning about an abnormal state of the amplifier 11a, for example, the administrator of this data transmission network can Go to the installation location of 11a,
It is necessary to correct the abnormal operation, and the disadvantage is that it takes time and manpower to travel to the installation location and perform the correction work.

The present invention has been developed in view of the above-mentioned problems, and even if a warning display is displayed for the amplifier, it is possible to easily perform inspection and maintenance work without having to go to the installation location of the amplifier in an abnormal state. The purpose of the present invention is to provide a centralized monitoring system for a bidirectional CATV transmission network.

[Means for Solving the Problems] That is, the centralized monitoring system for a bidirectional CATV transmission network according to the present invention includes a plurality of amplifier devices installed on a transmission line, a detection device that detects the operating state of the amplifier devices, and a detection device that detects the operating state of the amplifier devices. , a central monitoring device that determines whether the operating state of the amplification device detected by the detection device is an abnormal state; a display device that displays the content of the state determination in the central monitoring device; an external input device for inputting operation modification data for the amplifier device according to the content of the state determination of the amplifier device; and an external input device for adjusting and controlling the operation state of the amplifier device according to the modification data input by the external input device. The amplification operation adjustment control means is also provided.

[Operation] In other words, the administrator of the CATV transmission network can correct the operation of the amplifier in an abnormal state by simply inputting correction data using the external input device.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows the configuration of a centralized monitoring system for a bidirectional CATV transmission network. 1 is a detection device that performs state correction processing; 13 is a centralized monitoring device that monitors the state of the transmission line;
4 is a display device that displays the line status, 15.25 is a directional coupler that connects the main line of up and down signals, and 16 is a CAT
A coaxial line as a V main line, 21 a detection circuit that detects the operating state of the amplifier 11a, 22 a CPU circuit that performs transmission and reception processing of up and down signals, 23 a double modulation circuit that performs frequency conversion processing of up and down signals, and 24 a transmission circuit. This is a bidirectional filter that limits the band of the signal.

An adjustment circuit 31 for correcting the operating state of the amplifier 11H is connected between the CPU circuit 22 and the amplifier 11a in the detection device 12a. Further, an external input device 32 provided with, for example, a keyboard or an adjustment circuit is connected to the display device 14 for inputting correction data for the amplification operation in the amplification devices 11a, . . . .

That is, in the centralized monitoring system for a bidirectional CATV transmission network with the above configuration, the operating state of the amplifier 11a is as follows.
When the signal strength, voltage value, or switch open/close state is measured and detected by the detection circuit 21 of the detection device 12a, the detection data is converted into information through the CPU circuit 22, and then sent up through the double modulation circuit 23 and the bidirectional filter 24. The signals are sent to the central monitoring device 13 as signals XI and X2. Then, the central monitoring device 13 performs arithmetic processing based on the preset normal amplification data, and the detection device 12
It is determined whether the status data of the amplifying device 11a sent from a is abnormal or not, and if the central monitoring device 13 determines that the amplifying device 11a is in an abnormal operating state, The warning is displayed on the display device 14.

Here, when the administrator of the CATV transmission network sees the warning display on the display device 14 and learns of the abnormal state of the amplifier 11a, the administrator uses the external input device 32 to adjust the amplification according to the abnormal state. By inputting the correction data, this amplified correction data is transmitted to the detection device t as downstream signals y1 to y.
It is transmitted to the CPU circuit 22 of 12a. Then, the CPU
The circuit 22 outputs a correction command signal based on the amplification correction data sent from the external input device 32 to the adjustment circuit 31, and the adjustment circuit 31 controls the amplifier 11a by changing the switch, signal strength, voltage, etc. Adjust the amount. As a result, the operating state of the amplifier 11a is corrected to a normal state.

Therefore, according to the centralized monitoring system for a two-way CATV transmission network having the above configuration, abnormal conditions in the amplifier can be quickly and easily corrected without wasting time and manpower such as moving to the amplifier and labor. CAT
The administrator can now perform maintenance and inspection work on the V transmission network all at once.

[Effects of the Invention] As described above, according to the present invention, there is a plurality of amplifier devices installed on a transmission line, a detection device that detects the operating state of the amplifier devices, and a detection device that detects the operating state of the amplifier device. a central monitoring device that determines whether or not the operating state of the amplifier is abnormal; a display device that displays the status determination content of the central monitoring device; and a display device that displays the status determination content of the amplifier device that is displayed on the display device. an external input device for inputting operation modification data to the amplification device; and amplification operation adjustment control means for adjusting and controlling the operation state of the amplification device according to the modification data input by the external input device. , the administrator can correct the operation of an amplifier in an abnormal state by simply inputting correction data using the external input device, so even if a warning is displayed for the amplifier, the installation of the amplifier in an abnormal state can be corrected. Inspection and maintenance work can be easily performed without the need to go to the location.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a centralized monitoring system for a bidirectional CATV transmission network according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a conventional centralized monitoring system, and FIG. 3 is a block diagram showing the configuration of a conventional centralized monitoring system. FIG. 2 is a block diagram showing the internal configuration of an amplification device and a detection device in the centralized monitoring system of FIG. 11a...Amplifying device, 12a...Detecting device, 13.
... Central monitoring device, 14... Display device, 15°25.
...Directional coupler, 16...Coaxial line, 21...Detection circuit, 22...CPU circuit, 23...Double modulation circuit, 24...Bidirectional filter, 31...Adjustment circuit ,3
2...External input device. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] A plurality of amplifier devices installed on a transmission line, a detection device that detects the operating state of the amplifier device, and whether the operating state of the amplifier device detected by the detection device is an abnormal state. a central monitoring device for determining whether or not the central monitoring device has determined whether or not to operate; a display device for displaying the status determination contents of the central monitoring device; A two-way CATV transmission network comprising: an external input device for inputting data; and amplification operation adjustment control means for adjusting and controlling the operating state of the amplification device according to the correction data input by the external input device. central monitoring system.