JPH104591A - Remote control system for status monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To monitor and control the state of a relay amplifier safely and easily without the need for a high lift work by operating a portable infrared ray remote commander at a site, sending a control signal and controlling an overhead relay amplifier. SOLUTION: An operator operates a ten-key 33 of a portable infrared ray remote commander 3 at a site to send a control signal to an overhead relay amplifier 2. The relay amplifier 2 discriminates the control command received by an infrared ray receiving and emitting section 27 with a status monitor 26 to conduct gain control of the amplifier 2, switch control of a bridger gate switch and switching control of a source power supply of a power supply section 28. Simultaneously the infrared ray receiving and emitting section 27 converts a reply signal into infrared ray data and returns the data to the infrared ray remote commander 3. Then a CPU 32 of the infrared ray remote commander 3 decodes return data and displays the data onto a liquid crystal display device 31. Thus, the state of the relay amplifier is safely and easily recognized without the need for a high lift work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control system for a status monitor, and more particularly to a remote control system for a status monitor for individually remote-controlling status monitors built in various devices used for transmission line equipment in a CATV network.

[0002]

2. Description of the Related Art Conventionally, in order to monitor and control the operation state of various devices such as a relay amplifier, an optical conversion device, and a power supply device used in a CATV network, a status monitor built therein and a main control installed in a center are provided. Direct communication was performed with a device (status monitor monitoring and control device), and monitoring and control of the status monitor were performed by a remote control using a polling method from a main control device.

A remote control system of a status monitor by polling is disclosed in Japanese Patent Application Laid-Open
Japanese Patent Application Laid-Open No. 5-143514 discloses a "CATV repeater monitoring and control system".
No. 86 has a "CATV status monitor system".

[0004] First, a first prior art "CATV repeater monitoring and control system" will be described with reference to FIG. 3. A center monitoring and control device 60 transmits repeaters 63-1 and 63-2 through a CATV transmission line 62. ,... Are polled to collect monitoring data, and the repeaters 63-1,.
63-2,... Are controlled to open and close the bridger gate switches incorporated in each of the switches 63-2,. The center monitoring and control device 60 compares the open / closed state of the bridger gate switch in the collected monitoring data with the last remotely controlled open / closed state stored in the control result history database 64. Then, remote control of opening and closing of the bridger gate switch is performed with the contents previously controlled.

[0005] By this operation, even if a power failure occurs in the repeater and the open / close state of the bridger gate switch built in the repeater is different from the state controlled in the past, automatically occurs before the power failure. It returns to the open / closed state.

Next, a second prior art "CATV status monitor system" will be described with reference to FIG. 4. A polling center device 72 includes a plurality of relay amplifiers 74-1 to 74 provided on a CATV network. −
Then, polling is sequentially performed to monitor the operation state. Here, when an abnormality is detected in any of the relay amplifiers, the polling center device 72 transmits an alarm call request frame to the alarm device 75 connected to an arbitrary position on the CATV network. Upon receiving the signal, the alarm device 75 sounds an alarm to notify the administrator of the abnormality, and returns an alarm call request response frame to the polling center device 72.

With this operation, when the place where the status is to be displayed in a concentrated manner is unmanned, such as at night, an alarm device connected to an arbitrary position on the CATV network informs the relay amplifier of the abnormal operation and performs maintenance of the CATV system. It improves the performance.

The prior art described above relates to a remote control method of a status monitor by direct communication between a relay amplifier on the monitored and controlled side and a center main controller on the monitored and controlled side. Remote operation monitoring and control of the device under test on the control side can be operated not only from the center side but also from the place where the device under test is installed using a wireless remote control device, and operation monitoring of the device under test installed at a high place And its control by remote control equipment
The prior art will be described.

The third prior art disclosed in Japanese Patent Laid-Open Publication No.
With reference to the figure showing the usage form in FIG. 5, the receiver 1 of the wireless device of the “centralized test rack remote control wireless device” in JP 8933 receives an infrared ray which is a control signal from a transmitter 81 described later. At the same time, the test sound can be heard by the built-in speaker. The transmitter 81 of the wireless device transmits a control signal to the receiver 80 by infrared rays. The frame 84 of the existing equipment includes the device-side connector 8.
5 is attached, and is connected to the MTF through the test lead multi-wiring 87 via the pin terminal 86.

Next, the operation in this usage mode will be described. First, after setting the test information by the MTF, the connector 83 is connected to the pin terminal 86 in the insertion direction. Next, the power of the receiver 80 is turned on, and the tester goes to the device under test with the transmitter 81 and controls the receiver 80 by key operation to execute a test. In addition, it is possible to listen to the test sound using a speaker built in the receiver 80.

Here, the ST or PLS signal is transmitted from the remote controller (transmitting unit), and the receiving unit receiving the ST or PLS signal generates a pulse wave output signal. Each of the relays is driven after the power supply is amplified by a transistor in the relay drive unit. Thereby, the corresponding relay of the exchange under test is driven to enable the test.

As a result, the code of the remote control device for performing the test becomes unnecessary, so that the work range is restricted by the code length, and the remote control device does not need to be replaced when the test place is moved, so that the operation range is not required. In addition, safety and operability are improved by eliminating the entanglement of the operator with the cord of the remote controller, and the test sound can be easily heard by the built-in speaker.

[0013]

The first prior art "CATV repeater monitoring and control system" and the second prior art "CATV status monitor system".
Then, although it is enough for normal monitoring, CATV
During maintenance and inspection work outdoors where various devices of the network are installed, and during emergency response work, the information on the status monitor built into each device is not known, so the internal operating state cannot be determined. In order to know this, the center side was contacted by radio telephone etc. and confirmation was taken, so it was necessary to operate the monitoring and control device on the center side,
Special arrangement of technicians was required, and human efficiency could not be improved.

On the other hand, in order to know the status of various devices at an outdoor site, it is necessary to monitor the device by directly approaching the main unit. If the device to be monitored and the device to be tested are installed at a high place, Special deployment of aerial work vehicles and workers was also required, and time and human efficiency could not be improved.

Furthermore, when opening and closing the housing lids of various devices on site, it is necessary to control the tightening torque to maintain airtightness, and in the event of an emergency, there is a risk of occurrence of human error and However, due to the careful work, there was a great loss of time.

In the third prior art, "centralized test rack remote control wireless device", the receiver 1 needs to be specially prepared as receiving equipment for remote control operation, and every time the device under test changes. However, since the connector 4 of the connection cable 3 needs to be changed at a high place, remote control operation is possible, but workability is still poor.

[0017]

SUMMARY OF THE INVENTION A remote control system for a status monitor according to the present invention monitors and controls the operation state of a CATV device such as a CATV relay amplifier, an optical converter, and a power supply device connected to a CATV transmission network. In the monitoring control method of the status monitor built in the CATV device as a means for
The monitoring and control of all the CATV devices connected on the transmission network is performed by the main monitoring and control device provided on the center side, but the operation status of the status monitor of the corresponding CATV device at the time of regular inspection and maintenance or emergency response to trouble measures. At the site where the corresponding CATV equipment is installed, independently and independently of the main monitoring and control device.

[0018] The status monitor remote control system according to the present invention is characterized in that, among the CATV devices connected to the CATV transmission network, at least the periodic inspection and maintenance of the CATV devices which are installed at a location which is not easily accessible. Alternatively, the remote control and monitoring at the time of emergency response to a failure are performed by a cordless remote control device near the corresponding CATV device.

The remote control system for a status monitor according to the present invention comprises an operation key, a CPU, and a CPU for controlling and monitoring at least the status monitor by the remote control device and for processing and displaying status information returned from the status monitor. It is a portable and portable infrared remote control device having an infrared light receiving / emitting unit and a liquid crystal display.

In the remote control system of the status monitor according to the present invention, a plurality of relay amplifiers are cascaded through a CATV transmission line to a center station having a head-end device and a main monitoring and control device for monitoring and controlling the operation state of the CATV network. In the CATV network system, the relay amplifier is connected to a first power supply current supplied from the center station through the CATV transmission line and a first power supply current.
A first power separation filter for separating the signal from the downstream CATV signal, the first downstream CATV signal separated by the first power separation filter and taken into the own relay amplifier, the first power separation filter, and the CATV signal. A first separating unit that separates a direction from a first upstream transmission signal from the inside of the self-relay amplifier, which is transmitted to the center station through an upstream transmission band of a transmission line;
And the first downlink CATV separated by the first directional filter and taken into its own repeater amplifier while performing gain control under the control of a first control signal.
The signal level adjustment and equalization amplification are performed, and the second downlink C
A downstream amplifier for outputting as an ATV signal, and the second downstream CA of the downstream amplifier output for outputting to a lower CATV transmission path through a second power separation filter described later.
A second directional filter for direction-separating a TV signal and a second upstream CATV signal taken into the relay amplifier from the lower CATV transmission line side through the second power separation filter described later; and the second direction. A second power supply for superimposing a second supply current for supplying to a relay amplifier connected below on the second downstream CATV signal separated by the adaptive filter, and sending out the signal to the lower CATV transmission line; A separation filter, performing gain control under the control of a second control signal, and adjusting the level of the second upstream CATV signal separated by the second directional filter to perform the first upstream CATV signal An up-amplifier that sends the signal to the first directional filter and that is controlled by a third control signal to open and close a bridger gate switch therein; The power supply current separated by a separation filter or a commercial power supplied from the outside or a battery provided inside the self-relay amplifier is converted into a power supply used in the self-relay amplifier and supplied to a required portion. A power supply unit that is controlled by the third control signal from the status monitor to perform switching control to the power supply current or the power supply input source of either the commercial power supply or the battery; and a predetermined level inside the relay amplifier. The first and second downlink CATV signals and the first and second uplink CATV signals are monitored at measurement points, and the first and second uplink CATV signals are monitored in accordance with their level states to control gains of the downlink and uplink amplifiers. And outputting a second control signal and monitoring the power supply state of the power supply means to the inside of the relay amplifier itself. It outputs a third control signal for performing switching control of the power supply means input supply source according to a power supply state, and further transmits a fourth control signal transmitted from the center station side or transmitted from an infrared remote control device described later. Controlled by a fifth control signal input through a first infrared light receiving / emitting means, which will be described later, to output the third control signal for controlling the opening / closing of the bridger gate switch built in the upstream amplifier. The monitoring result information and the control signal output information are used as status information inside the local repeater amplifier as the first directional filter,
The first power separation filter and the center station side CA
A status monitor for transmitting to the main monitoring and control device of the center station through the upstream transmission band of the TV transmission line and transmitting to the infrared remote control device to be described later through the first infrared receiving and emitting means to be described later; and the infrared remote control device to be described later Receiving the infrared remote control signal from the remote controller and converting it to an electric signal and sending it as the fourth control signal to the status monitor, and converting the status information sent from the status monitor into an infrared signal to obtain an infrared status information signal The first infrared receiving / emitting means for transmitting to the infrared remote controller described below; the infrared remote controller is an operation button for remote-controlling the status monitor of the relay amplifier; The remote controller is controlled according to an operation command from the numeric keypad. A CPU that outputs a control signal for processing the status information returned from the status monitor, a liquid crystal display for displaying the status information processed by the CPU on the screen, the CP
The remote control control signal to the status monitor output from U is converted from an electric signal to an infrared signal, and is emitted and output as the infrared remote control signal described above, transmitted to the first infrared receiving and emitting means of the relay amplifier, and The infrared status information signal, which is emitted and returned from the first infrared receiving / emitting means, is received and converted into an electric signal,
U second infrared light receiving and emitting means for supplying to the U
A battery for supplying required power to the liquid crystal display and the second infrared receiving / emitting means; and a cordless portable and portable type.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. First, the configuration diagram of the CATV network of FIG. 1 will be described. This CATV system comprises a center station 1 having a head end device 10 and a CATV network monitoring main controller 11, and a plurality of relay amplifiers 2-1 to 2-2 cascaded to the center station 1 through a coaxial cable.
-N, and the relay amplifier 2-n is installed fictitiously between the telephone poles 5-1 and 5-2.

With this network configuration, the CATV network monitoring main controller 11 of the center station 1 uniformly controls each of the relay amplifiers 2-1 to 2-n regardless of whether or not they are installed fictitiously. In order to check the operation state of the relay amplifier, polling control is performed on a status monitor built in each relay amplifier to collect predetermined status information.

At the time of periodic maintenance / inspection and emergency response, for example, the relay amplifier 2 which is not installed fictitiously
In the case of -1 to 2-m, the lid of the housing is opened and a predetermined operation is performed as in the conventional case.
In n, the operation is performed by the infrared remote controller 3 from the vicinity of the housing, and the same operations as those for maintenance / inspection and emergency response performed without using the infrared remote controller 3 in the relay amplifiers 2-1 to 2-m are performed. .

Next, referring to FIG. 2, the relay amplifier 2 (FIG. 1)
In the following, a description will be given of a case where the relay amplifier 2-n) is operated by the infrared remote controller 3 to perform maintenance / inspection and troubleshooting.

First, the configuration will be described. The relay amplifier 2 includes a power separation filter (PSF) 20 for separating a downstream transmission signal input via the input / output terminal X from a supply current.
A directional filter 21 for separating a downstream transmission signal from the PSF 20 and an internally amplified upstream transmission signal from an upstream amplifier 25 to be described later; A downlink amplifier 22 that performs level adjustment and the like; a directional filter 23 that separates a downlink transmission signal from the downlink amplifier 22 from an uplink transmission signal input via the input / output terminal Y; A power separation filter (PSF) 24 that superimposes a supply current on a transmission signal and outputs from an input / output terminal Y, and a bridger gate switch that amplifies and level-adjusts an upstream transmission signal separated by a directional filter 23. Based on an upstream amplifier 25 and a supply current separated by the PSF 24 or a commercial AC power input through the AC input terminal Z. A power supply unit 28 for supplying a DC voltage and a current used and consumed by the power supply unit, a level of a downlink transmission signal and an uplink transmission signal, a power supply state of the power supply unit 28, a gain adjustment of the downlink amplifier 22 and the uplink amplifier 25, and a power supply The switching control of the commercial power supply / supply current / battery source power supply of the section 28 and the opening / closing control of the bridger gate switch inside the upstream amplifier 25 are performed, and the information is stored in CA.
A status monitor (SMT) 26 for sending to the center side and sending to an infrared remote controller 3 to be described later through the upstream transmission band of the TV transmission path, and converting an infrared control signal transmitted from the infrared remote controller 3 to an electrical control signal to an SMT 26 In response to this, a control signal for controlling the gain of the downstream amplifier 22 and the upstream amplifier 25, controlling the opening and closing of the bridger gate switch in the upstream amplifier 25, and controlling the switching of the commercial power supply / supply power / battery source power of the power supply unit 28 is transmitted. S
Level information of the downstream transmission signal and the upstream transmission signal from the MT 26, power supply information of the power supply unit 28, open / close control information of the bridger gate switch in the upstream amplifier 25, commercial power / supply power / source power of the battery of the power supply 28 It includes an infrared light receiving / emitting unit 27 that converts switching control information and status information such as address information of the own SMT 26 into an infrared signal and transmits the infrared signal to an infrared remote controller 3 described later.

The infrared remote controller 3 includes a battery 34 for supplying power to the inside, a ten-key 33 as an operation button for remote-controlling the relay amplifier 2, and a remote controller for controlling the relay amplifier 2 in accordance with an operation command from the ten key 33. A control signal to be controlled is output, and S
CP for processing status information returned from MT 26
U32 and the remote control control signal of the electric signal output from the CPU 32 are converted into infrared signals, and the infrared signals are transmitted to the infrared light receiving / emitting unit 27 of the relay amplifier 2 and the infrared light emitted and transmitted from the infrared light receiving / emitting unit 27 of the relay amplifier 2 is transmitted. An infrared light receiving / emitting unit 30 that receives and converts the status information of the signal into light and outputs it to the CPU 32, and a liquid crystal display 31 that displays the status information from the relay amplifier 2 received and processed by the CPU 32 on a liquid crystal display. .

The operation will be described with reference to FIG. 1 and FIG. Normally, communication is performed between the CATV network monitoring main controller 11 of the center station 1 and the status monitor (SMT) 26 built in the relay amplifiers 2-1 to 2-n on the CATV network, and the CATV network monitoring main control is performed. In the device 11, the relay amplifiers 2-1 to 2-
The monitoring and control of each state are performed.

In the CATV network monitoring system according to the present embodiment, in addition to the monitoring and control at the center station 1, the worker 4 operates the portable, handy control infrared remote controller 3 at the site, and is installed imaginarily. Monitoring and control of the state of the relay amplifier 2-n can be easily performed. In addition, even when all the relay amplifiers 2-1 to 2-m are installed fictitiously, if these relay amplifiers have the infrared receiving / emitting unit 27 having the same function as the relay amplifier 2-n,
When the worker 4 moves to the site and transmits a control command to each relay amplifier by a remote control operation performed for each relay amplifier, the control command received by the infrared light receiving / emitting unit 27 at each relay amplifier is transmitted to the status monitor 22. By making a judgment, the gain control of the amplifier, the open / close control of the bridger gate switch, and the switching control of the source power of the power supply unit 28 are performed.

On the other hand, in the portable infrared remote controller 3, the status monitor 26 in each relay amplifier is transmitted to the relay amplifier by infrared data by inputting a control command desired by the field worker 4 with the ten keys 44. A response signal from the status monitor 26 that can be controlled and receives the control command is converted into infrared data by the infrared light receiving / emitting unit 27 and returned to the infrared remote controller 3.
The infrared remote controller 3 receiving this response returns the internal CPU
At 32, the reply data is decoded and the liquid crystal display 31
The response is displayed above. With this response display, the field worker 4 can immediately know the operating state and control state inside each relay amplifier at hand.

In the CATV network monitoring system according to the present embodiment, the control by the infrared remote controller 3 interrupts the communication between the CATV network monitoring main controller 11 and the status monitor 26 in a normal state. The control by the infrared remote controller 3 is prioritized. At this time, the communication content of the control command from the infrared remote controller 3 is recorded in the printer 12 connected to the CATV network monitoring main controller 11.

As described above, the individual control by the infrared remote controller 3 in this embodiment is performed by the external control input / output port using infrared rays on the status monitor 26 built in the relay amplifier especially installed on the CATV network. By transmitting / receiving data to / from the portable infrared remote controller 3 by connecting a certain infrared receiving / emitting unit 27, the operator 4 can directly control the operation and control state of the relay amplifier alone directly to the imaginary relay amplifier even outdoors. It can be grasped instantly without touching, and thus without working at heights.

In the above description, the devices connected to the CATV network are all relay amplifiers for the sake of simplicity. However, it is necessary to connect to the CATV network and monitor and control the internal state. If it is a device of the type, it is not limited to a relay amplifier.For example, if a status monitor and an infrared light receiving / emitting unit are provided inside a power supply device or an optical conversion device, it can be similarly monitored and controlled by an infrared remote control. It is obvious without giving details.

[0033]

As described above, according to the present invention, C
By operating the infrared remote control, the ATV site worker operates a status monitor built in various devices such as a relay amplifier on the CATV network, and the content is displayed on a liquid crystal display of the infrared remote control. It is possible to easily and safely know the status of various devices, such as relay amplifiers, without performing work at heights.
This can greatly contribute to more efficient maintenance of the TV network system. As a result, the quality of the CATV line is improved, no special maintenance staff is required on the center side, and the safety of field workers can be ensured.

[Brief description of the drawings]

FIG. 1 is a CATV network configuration diagram showing a remote control system of a status monitor according to an embodiment of the present invention.

FIG. 2 is a block diagram of the relay amplifier and the infrared remote controller of the embodiment.

FIG. 3 is a block diagram of a first conventional example.

FIG. 4 is a block diagram of a second conventional example.

FIG. 5 is a system diagram of a third conventional example.

[Description of Signs] 1 center station 2-1 to 2-n relay amplifier 3 infrared remote controller 4 worker 5-1 and 5-2 telephone pole 10 head end device 11 CATV network monitoring main control device 12 printer 20, 24 power separation filter (PSF) 21,23 Directional filter 22 Down-amplifier 25 Up-amplifier 26 Status monitor (SMT) 27,30 Infrared light receiving / emitting unit 28 Power supply unit 31 Liquid crystal display 32 CPU 33 Numeric keypad 34 Battery

Claims (4)

[Claims] 1. A status monitor built in a CATV device, which is a means for monitoring and controlling an operation state of a CATV device such as a relay amplifier, an optical conversion device, and a power supply device for the CATV connected on a CATV transmission network. In the system, monitoring and control of all the CATV devices connected to the CATV transmission network are normally performed by a main monitoring and control device provided at a center side. A status monitor remote control system, wherein the operation status of the status monitor of the device is remotely controlled and monitored independently at the site where the corresponding CATV device is installed, independently of the main monitoring and control device. 2. The remote control unit of the CATV device connected to the CATV transmission network which is installed at least in a place where it cannot be easily reached by the user at the time of the periodic inspection and maintenance or the emergency response to a failure countermeasure. 2. The status monitor remote control system according to claim 1, wherein the control and monitoring are performed by a cordless remote control device near the corresponding CATV device. 3. An operation key for controlling and monitoring at least the status monitor by the remote control device, and processing and displaying status information returned from the status monitor, a CPU, an infrared light receiving / emitting unit, and a liquid crystal display. 3. The remote control system of a status monitor according to claim 1, wherein the remote control device is a portable and portable infrared remote control device. 4. A CATV network system in which a plurality of relay amplifiers are cascaded through a CATV transmission line to a center station having a head-end device and a main monitoring and control device for monitoring and controlling the operation state of the CATV network. Are separated by a first power separation filter that separates a first supply current from the center station side and a first downstream CATV signal that are input through the CATV transmission line, and a first power separation filter. A first downlink CATV signal to be taken into the self-relay amplifier, a first uplink transmission signal from the self-relay amplifier to be transmitted to the center station through the first power separation filter and the upstream transmission band of the CATV transmission line, and And a first directional filter that separates the direction of the signal, and that the gain is controlled by being controlled by the first control signal. A downstream amplifier that performs level adjustment, equalization amplification, and the like of the first downstream CATV signal separated by the first directional filter and incorporated in the own relay amplifier, and outputs the same as a second downstream CATV signal; CATV through the second power separation filter of
A second downstream CATV signal of the downstream amplifier output for output to the transmission line side and a second upstream CATV signal taken into the relay amplifier from the lower CATV transmission line side through a second power separation filter described later; A second directional filter for directional separation, and a second feed current for supplying to the relay amplifier connected below the second downstream CATV signal separated by the second directional filter. The second power separation filter for transmitting the signal to the lower CATV transmission line, and the second power separation filter for controlling the gain under the control of the second control signal and separating the second power separation filter by the second directional filter. Up C
The level of the ATV signal is adjusted, and the first uplink CA is adjusted.
An upstream amplifier for transmitting a TV signal to the first directional filter and controlled by a third control signal to open and close a bridger gate switch therein; and an input amplifier separated by the first power separation filter. The power supply current or externally input commercial power or a battery provided inside the self-relay amplifier is converted to a power used in the self-relay amplifier and supplied to a required portion, and the status from the status monitor. A power supply unit controlled by a third control signal to perform switching control to the power supply input source of either the supply current or the commercial power supply or the battery; and a first level measurement point at a predetermined level measurement point inside the own relay amplifier. Alternatively, the level of the second downstream CATV signal and the level of the first or second upstream CATV signal are monitored, and according to the level state. It outputs the first and second control signals for controlling the gains of the downstream and upstream amplifiers, monitors the power supply state of the power supply means to the inside of its own relay amplifier, and responds to the power supply state. A third control signal for controlling switching of the power supply means input supply source is output, and a fourth control signal transmitted from the center station side or transmitted from an infrared remote control device described later and transmitted to a first control signal described later. Fifth input through infrared receiving / emitting means
The third control signal for controlling the opening and closing of the bridger gate switch built in the upstream amplifier under the control of the control signal
And outputs the monitoring result information and the control signal output information as status information inside the self-relay amplifier, the first directional filter, the first power separation filter, and the upstream of the center station side CATV transmission path. A status monitor for transmitting to the main monitoring and control device of the center station through a transmission band and transmitting to the infrared remote control device to be described later through the first infrared light receiving and emitting means to be described later; and infrared remote control from the infrared remote control device to be described later. The status signal transmitted from the status monitor is converted into an infrared signal, and the status information transmitted from the status monitor is converted into an infrared signal. The above-mentioned first infrared light emitting / receiving device for transmitting to a device And a stage; wherein the infrared remote control device outputs a ten key as an operation button for remote control of the status monitor of the relay amplifier, and a control signal for performing the remote control in accordance with an operation command from the ten key. And a CPU for processing the status information returned from the status monitor.
A liquid crystal display for displaying the status information processed by the CPU on a screen; a remote control signal for the status monitor output from the CPU converted from an electric signal to an infrared signal; The CPU outputs the light as a signal, transmits the signal to the first infrared light receiving and emitting means of the relay amplifier, receives the infrared status information signal returned from the first infrared light receiving and emitting means, converts the signal into an electric signal, and converts the signal into an electric signal. And a battery for supplying required power to the CPU, the liquid crystal display, and the second infrared receiving / emitting means; and a cordless portable and portable type. The remote control method of the status monitor characterized by the above.