JP2841998B2 - Transceiver inspection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transceiver tester and a transceiver tester for detecting an external interference wave during a reception test.

[0002]

2. Description of the Related Art A conventional transmitter / receiver inspection apparatus comprises a main control unit, a signal generator controlled by a control signal output from the main control unit to output a high-frequency transmission signal, a first terminal and a second terminal. A terminal has a common terminal and a common terminal. A switching signal output from the main control unit outputs a transmission signal input from the first terminal and a signal input from the common terminal to a reception signal from the second terminal. A high-frequency relay that outputs as
An antenna connected to a common terminal of the high-frequency relay for transmitting and receiving radio waves, an operation detection unit for detecting an operation of the transceiver and outputting a detection signal to the main control unit, and an input connected to a second terminal of the high-frequency relay; And a power meter that measures the power of the received signal to be measured and outputs the measurement result as a power value to the main control unit. A conventional transceiver inspection apparatus will be described in detail with reference to the drawings.

FIG. 2 is a block diagram showing an example of the prior art. The signal generator 12 outputs a high-frequency transmission signal b controlled by a control signal a output from the main control unit 11. The high-frequency relay 21 has a first terminal 211 and a second terminal 21.
2 and a common terminal 213. Common terminal 2
The switching is performed by a switching signal g output from the main control unit 11 so that either the first terminal 211 or the second terminal 212 is conducted. At the time of the reception inspection, the main control unit 1 is controlled so that the first terminal 211 and the common terminal 213 are conducted.
1 is controlled by the switching signal g . In this case, the transmission signal b output from the signal generator 12 is
The signal is guided from the first terminal 211 to the common terminal 213 and transmitted from the antenna 14 as a radio wave c .

The transceiver 15 performs a receiving operation when receiving the radio wave c transmitted by the antenna 14. Motion detector 16
Detects the receiving operation of the transceiver 15 and outputs a detection signal d. The main controller 11 receives the detection signal d output from the operation detector 16 and knows that the transceiver 15 has performed the receiving operation. At the time of the transmission inspection, the main control unit 11 controls the switching signal g so that the second terminal 212 and the common terminal 213 of the high-frequency relay 21 conduct. In this case,
The antenna 14 receives the radio wave c output from the transceiver 15, is guided from the common terminal 213 of the high-frequency relay 21 to the second terminal 212, and is input to the wattmeter 17 as a reception signal e . The power meter 17 receives the received signal e , measures the power, and outputs a power value f. The main control unit 11 inputs the power value f, obtains the transmission power of the transceiver 15, and detects that the transmission operation is being performed.

[0005]

In the above-described conventional transmitter / receiver inspection apparatus, the measurement path is switched by the high-frequency relay between the reception inspection and the transmission inspection. Cannot be monitored by the main control unit, and the reliability of the reception test is low. In addition, since a high-frequency relay having mechanical contacts is used, there are disadvantages that the failure rate is high and the reliability of inspection is low due to deterioration of the contacts. Further, there is a disadvantage that the main control unit is complicated because a switching signal is required to control the high-frequency relay.

[0006]

According to the present invention, there is provided a transmitter / receiver inspection apparatus, comprising: a main controller; a signal generator controlled by a control signal output from the main controller to output a high-frequency transmission signal;
It has an input terminal, an output terminal, and an input / output terminal, each having one terminal. The transmission signal output from the signal generator is input from the input terminal and output from the input / output terminal, and the signal input from the input / output terminal is output from the output terminal. A directional coupler, an antenna connected to the input / output terminal of the directional coupler for transmitting and receiving radio waves, an operation detection unit for detecting an operation of the transceiver and outputting a detection signal to the main control unit, A power meter connected to the output terminal of the coupler for measuring the power of the input received signal and outputting the measurement result as a power value to the main control unit.

[0007]

Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention.

The transceiver testing apparatus shown in FIG. 1 comprises a main control unit 11, a signal generator 12 controlled by a control signal a output from the main control unit 11, and outputting a high-frequency transmission signal b.
It has an input terminal 131, an output terminal 132, and an input / output terminal 133, each having one terminal. A transmission signal b output from the signal generator 11 is input from the input terminal 131, output from the input / output terminal 133, and input from the input / output terminal 133. A directional coupler 13 for outputting a signal from an output terminal 132, an antenna 14 connected to the input / output terminal 133 of the directional coupler 13 for transmitting and receiving radio waves, and a detection signal d for detecting the operation of the transceiver 15
And a wattmeter connected to the output terminal 132 of the directional coupler 13 for measuring the power of the input received signal e and outputting the measurement result as a power value f to the main control unit. 17 are included.

First, a signal generator 12 is controlled by a control signal a output from a main control unit 11 to transmit a high-frequency transmission signal b.
Is output. The directional coupler 13 has three terminals: an input terminal 131, an output terminal 132, and an input / output terminal 133. The transmission signal b input from the input terminal 131 is output from the input / output terminal 133. Also, the input / output terminal 133
Received signal e input from the output from the output terminal 132. The antenna 14 inputs the transmission signal b output from the signal generator 12 through the directional coupler 13 and transmits the signal as a radio wave c . The transceiver 15 performs a receiving operation when receiving the radio wave c transmitted by the antenna 14. Motion detector 16
Detects the receiving operation of the transceiver 15 and outputs a detection signal d. The main controller 11 receives the detection signal d output from the operation detector 16 and knows that the transceiver 15 has performed the receiving operation. The reception test is performed in this manner. On the other hand, at the time of transmission inspection, the antenna 14 receives the radio wave c output from the transceiver 15, is guided from the input / output terminal 133 of the directional coupler 13 to the output terminal 132, and outputs the received signal e as the received signal e.
7 is input. The power meter 17 receives the received signal e , measures the power, and outputs a power value f. Main control unit 1
1 inputs the power value f, calculates the transmission power of the transceiver 15, and detects that a transmission operation is being performed.

Next, the reception check will be described in detail.
At the time of reception inspection, the transmission signal b output from the signal generator 12
Are input terminal 131 of directional coupler 13 to input / output terminal 1
The signal is transmitted as a radio wave c from the antenna 14 through 33. The transceiver 15 transmits the radio wave transmitted from the antenna 14
c and performs a receiving operation. At this time, in the environment where the transceiver 15 is placed, there is an extraneous interference wave other than the transmission signal for inspection. The antenna 14 converts the transmission signal b into a radio wave c and converts an external interference wave included in the radio wave c into an electric signal. The disturbance wave converted into this electric signal is
From the input / output terminal 133 of the directional coupler 13 to the output terminal 13
2 through a power meter 17. The wattmeter 17
The power of the interference wave is measured and output as a power value f. The main control unit 11 monitors the power value f and detects an interference wave.
If an interfering wave is detected during the reception test, the reception test is invalidated and the reception test is performed again.

[0011]

According to the transmitter / receiver inspection apparatus of the present invention, a directional coupler that does not use mechanical contacts is provided in place of a high-frequency relay having mechanical contacts. The effect is that the reliability of the inspection is high.
Further, since the switching signal required for controlling the high-frequency relay is not required, there is an effect that the main control unit is simple. Further, also at the time of the reception test, since the power meter can measure the radio wave received by the antenna through the directional coupler and detect the external interference wave, there is an effect that the reliability of the reception test is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing an example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Main control part 12 Signal generator 13 Directional coupler 14 Antenna 15 Transceiver 16 Operation detection part 17 Wattmeter 21 High frequency relay 131 Input terminal 132 Output terminal 133 Input / output terminal 211 First terminal 212 Second terminal 213 Common Terminal a Control signal b Transmission signal c Radio wave d Detection signal e Reception signal f Power value g Switching signal

Claims (1)

(57) [Claims] A main control unit, a signal generator controlled by a control signal output from the main control unit and outputting a high-frequency transmission signal, an input terminal, an output terminal, and an input / output terminal, each having one terminal; A directional coupler that inputs a transmission signal output from the signal generator from an input terminal and outputs the signal from an input / output terminal, and outputs a signal input from the input / output terminal from an output terminal; An antenna connected to a terminal for transmitting and receiving radio waves; and an antenna disposed close to the transceiver, wherein the transceiver is
The receiving operation to be performed when the radio wave transmitted from the
An operation detecting unit that detects and outputs the detected signal as a detection signal to the main control unit, and measures the power of a received signal that is connected to an output terminal of the directional coupler and that is input to the main control unit. A power meter that outputs to the unit, the antenna converts an external disturbance wave included in the radio wave into an electric signal and inputs the electric signal to the directional coupler, and the main control unit performs the reception test, Control signal generator
To generate a high-frequency transmission signal.
The transceiver receives the radio wave transmitted from the antenna.
Detection from the operation detection unit caused by the communication
The presence or absence of reception was confirmed from the signal, and at the time of the reception inspection, the main control unit detected the jamming radio wave via the directional coupler and the power meter .
When the receiving test is invalidated, the receiving test is performed again .