JPH03214933A - Information transfer system for radio transmitter-receiver - Google Patents

Abstract

PURPOSE:To transfer a power supply output voltage and a reception input electric field monitor voltage from an output part to an indoor part in using as monitor information with simple and inexpensive circuit constitution by adding the power supply output voltage and the reception input electric field monitor voltage, and superimposing a DC summing voltage onto a reception signal to generate a superimposing signal, and sending the result to a cable. CONSTITUTION:A reception input electric field monitor voltage and a DC voltage are added by a DC adder circuit 16, and the summed DC voltage is applied to a DC superimposing circuit 18 together with a reception signal. The DC superimposing circuit 18 superimposes the reception signal and the DC summed voltage and outputs a resulting superimposing signal. The superimposing signal is supplied to a DC separation circuit 20 of an indoor section 12 via a cable 14. The DC separation circuit 20 separates the superimposing signal into the reception signal and the added DC voltage, and the DC added voltage is applied to a level discrimination circuit 22, from which an operating signal with equal voltage to the added DC voltage is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an information transfer system for a wireless transmitter/receiver that includes an outdoor area and an indoor area connected to the outdoor area by a cable, and particularly relates to The present invention relates to an information transfer method for transmitting a received signal, a power output voltage output from a power supply circuit in the outdoor area, and a received input electric field monitor voltage corresponding to the received power in the outdoor area to the indoor area via a cable.

(Prior Art) Generally, a wireless transmitting/receiving device consists of an outdoor part installed outdoors and an indoor part installed indoors and connected to the outdoor part by a cable. Monitoring means is provided for monitoring the state of the circuit from inside the room.

One of the monitoring means includes a modulation unit that modulates a carrier signal according to monitoring information such as an indoor operating state, a received input electric field monitor voltage, and an alarm, and transfers the modulated carrier signal; Some devices include a demodulation section that demodulates a carrier signal transferred from the carrier signal and obtains the monitoring information based on the carrier signal.

The other monitoring means includes a transmitting section that respectively takes in and transmits the monitoring information, a number of connection cables each having one end connected to the transmitting section and corresponding to the number of the monitoring information, and the other end of the connection cable. Some devices have a receiving section that is connected to each of the monitoring information and receives each of the monitoring information.

(Problem to be Solved by the Invention) However, with the former monitoring means, analog signals cannot be transferred as they are, so the received input electric field monitor voltage, which is an analog signal, is converted into digital information by an A/D converter, and the analog signal is converted into digital information. The carrier signal is modulated according to the digital information.

As a result, the circuit becomes large and expensive.

Furthermore, with the latter monitoring means, connection cables are required depending on the number of pieces of monitoring information, so it takes time and effort to install the connection cables.

SUMMARY OF THE INVENTION An object of the present invention is to provide an information transfer system for a wireless transmitting/receiving device that can simplify and reduce the cost of a circuit that transfers monitoring information from outdoors to indoors.

(Means for Solving the Problems) The present invention provides a reception signal received at the outdoor part of a wireless transmitting/receiving device that includes an outdoor part and an indoor part separated from the outdoor part and connected to the outdoor part by a cable. , an information transfer method for transmitting a power supply output voltage output from the outdoor power supply circuit and a received input electric field monitor voltage corresponding to the received power when the received signal is received to the indoor area via the cable; The outdoor part includes a DC adding circuit that adds the value of the power supply output voltage and the value of the received input electric field monitor voltage, and outputs a DC added voltage of the added value; a DC superimposition circuit that superimposes an added voltage to generate a superimposed signal and sends the superimposed signal to the cable; the indoor interior is provided with the superimposed signal via the cable; a separation circuit that separates the DC addition voltage and the received signal; a level determination circuit that outputs an operation signal having a voltage value equal to the value of the DC addition voltage separated by the separation circuit; and a value of the DC addition voltage. and a level conversion circuit that subtracts the value of the power supply output voltage from and reproduces the value of the received input electric field monitor voltage.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of an information transfer system of a wireless transmitter/receiver according to the present invention.

The wireless transmitting/receiving device includes an outdoor section 10 installed outdoors, and an indoor section 12 separated from the outdoor section and installed indoors. Cable 1 connects outdoor area 10 and indoor area 12
Connected by 4.

The outdoor section 10 includes a receiving path (not shown) that outputs a received signal corresponding to the radio waves being received by an antenna (not shown), and a power supply circuit (not shown) that supplies power to the receiving circuit. and has. The received signal is an AC signal, and the power supply output voltage output from the power supply circuit is a DC voltage. The value of the DC voltage is constant when the power supply circuit is operating normally. Further, in the outdoor section 10, a received input electric field monitor voltage corresponding to the received power when the received signal is received is generated. The received input electric field monitor voltage is a DC voltage. The value of the received input electric field monitor voltage and the value of the DC voltage are added by a DC addition circuit 16, and the DC addition circuit 16 outputs a DC addition voltage of the added value. The DC added voltage is applied to the DC superimposition circuit 18 together with the received signal. The DC superimposition circuit 18 superimposes the received signal and the DC added voltage, and outputs a superimposed signal in which each is superimposed.

The superimposed signal is applied to a DC separation circuit 20 in the indoor area 12 via a cable 14. The DC separation circuit 20 separates the DC component from the superimposed signal, and the signal from which the DC component has been separated becomes the received signal and is output. On the other hand, the DC component becomes the DC added voltage and is output. The DC added voltage separated from the superimposed signal by the DC separation circuit 20 is applied to a level determination circuit 22. The level determination circuit 22 outputs an operation signal having a voltage value equal to the value of the DC addition voltage.

Further, the DC added voltage is applied to a level conversion circuit 24 via a level determination circuit 22. Level conversion circuit 24
subtracts the value of the power supply output voltage from the value of the DC added voltage and outputs the difference between the voltage values. The difference between the voltage values becomes the value of the received input electric field monitor voltage.

Before operation, since the output voltage value of the power supply circuit of the outdoor section 10 is a constant value, the level conversion circuit 24 is set to a constant value of the power supply output voltage.

During operation, the power supply output voltage indicating the voltage output from the power supply circuit and the received input electric field monitor voltage are applied to the DC adder circuit 16. The DC adding circuit 16 adds the value of the power supply output voltage and the value of the received input electric field monitor voltage, and outputs a DC added voltage of the added voltage value. The DC added voltage is applied together with the received signal to a DC superimposition circuit 18, which superimposes the DC added voltage on the received signal and outputs a superimposed signal. The superimposed signal is applied to a DC separation circuit 20 via a cable 14.

The DC separation circuit 20 separates the superimposed signal into the received signal and the DC added voltage. The received signal is further provided to downstream circuitry (not shown) in the indoor interior 12. On the other hand, the DC added voltage is applied to the level determination circuit 22. The level determination circuit 22 outputs an operation signal having a voltage value equal to the value of the DC addition voltage. When the voltage value of the operation signal is "0", it is known that a disconnection of the cable 14, a failure of the power supply circuit, or a disconnection of the cable connecting the power supply circuit and the surrounding circuits has occurred. It becomes clear that the indoor interior 10 is not operating normally.

Next, the DC added voltage is applied to a level conversion circuit 24 via a level determination circuit 22.

The level conversion circuit 24 subtracts a set value, that is, a constant value of the power supply output voltage, from the DC voltage value, and the value of the received input electric field monitor voltage is reproduced.

(Effects of the Invention) According to the present invention, the power supply output voltage and the received input electric field monitor voltage can be transferred from an outdoor room to an indoor room as monitoring information with a simple and inexpensive circuit configuration.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an information transfer system of a wireless transmitter/receiver according to the present invention. DESCRIPTION OF SYMBOLS 10...Outdoor area, 12...Indoor area, 14...Cable, 16...DC addition circuit, 18...DC superimposition circuit, 20...DC separation circuit, 22...Level judgment Circuit, 24...Level conversion circuit.

Claims (1)

[Claims] A received signal received at the outdoor part of a wireless transmitting/receiving device consisting of an outdoor part and an indoor part separated from the outdoor part and connected to the outdoor part by a cable, and a power output output from a power supply circuit of the outdoor part. An information transfer method in which a received input electric field monitor voltage corresponding to a voltage and a received power when the received signal is received is transferred to the indoor area via the cable, wherein the outdoor area is connected to the power supply output voltage. and a value of the received input electric field monitor voltage, and outputs a DC added voltage of the added value;
a DC superimposition circuit that superimposes the DC addition voltage on the received signal to generate a superimposed signal, and sends the superimposed signal to the cable, and the indoor area is provided with the superimposed signal via the cable. a separation circuit that separates the superimposed signal into the DC addition voltage and the received signal; and a level determination circuit that outputs an operation signal having a voltage value equal to the value of the DC addition voltage separated by the separation circuit. and a level conversion circuit that subtracts the value of the power supply output voltage from the value of the DC addition voltage and reproduces the value of the received input electric field monitor voltage.