KR19980039114A - Easy-to-adjust car audio AM tuner adjustment jig - Google Patents

Abstract

The present invention relates to an easy-to-adjust car audio AM tuner adjustment jig, and in particular, in the waveform inspection controller for adjusting the AM tuner, it is easy to make adjustments to automatically adjust and tune the AM tuner. A car audio AM tuner tuning jig.

In the present invention, by providing an adjustment jig to automatically perform the inspection and adjustment for the tuner UUT (Unit Under Test), due to the easy adjustment of the car audio AM tuner adjustment jig, It automatically selects and sets the broadcast for the broadcast, and automatically adjusts to receive the best signal in the worst condition for the set broadcast.

Description

Easy-to-adjust car audio AM tuner adjustment jig

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car audio AM tuner adjusting jig that is easy to adjust in an apparatus for inspecting and adjusting a car audio set, and more particularly to a waveform inspector for inspecting and adjusting an AM tuner. The present invention relates to an easy-to-adjust car audio AM tuner adjusting jig for automatically adjusting and adjusting the AM tuner.

In general, a printed circuit board for processing a video / audio signal is included in a video tape recorder (hereinafter referred to as a VTR), a video camera and a television (hereinafter referred to as a TV), including car audio. In the process of producing audio and VTR or TV, the process of inspecting the printed circuit board embedded therein is involved.

The printed circuit board is equipped with a plurality of adjustment parts to perform the function of adjustment. Looking at this functionally there are various things such as a tuner (TUNER) for tuning the frequency, a signal processor for processing video and audio signals.

The inspection adjusting device for the AM tuner of the conventional car audio tuner related to the general technology includes a car audio set 4 and a tuner UUT 5 as an inspection adjusting object, as shown in FIG. The apparatus for inspecting and adjusting the car audio tuner is composed of a signal generator 1, an oscilloscope 2, and an antenna pile 3.

The inspection method for the AM tuner UUT using the conventional car audio AM tuner inspection adjusting device is to manually connect each device manually as shown in FIG. After the operator sets the measurement frequency and the measurement band in consideration of the tuner or the FM tuner, the inspector is operated to operate the adjusting terminal formed on the tuner UUT 6 by hand. As a device for inspecting and adjusting, this is a relationship between inspecting and adjusting the tuner by manual operation, which not only takes a lot of time to inspect and adjust, but also makes it impossible to uniformize the product, thereby degrading the quality.

The present invention has been made to solve the above problems and to achieve an improvement.

Accordingly, an object of the present invention is to enable the automatic adjustment of the AM tuner in the waveform inspection regulator for inspecting and adjusting the AM tuner, thereby reducing the inspection and adjustment time, as well as uniformizing the product. And an easy-to-adjust car audio AM tuner adjustment jig so that the overall quality can be improved accordingly.

As a technical means for achieving the above object of the present invention, the car audio AM tuner adjustment jig of the present invention is easily modulated by generating a modulated standard signal in a standard signal generator, and then modulating the modulated signal through the antenna dummy. When supplied to the UUT, the tuner UUT is tuned according to the tuning voltage (VT) from the car audio set and demodulated and output to the car audio set, and the signal processed by the car audio set is output to the oscilloscope. In the car audio AM tuner inspection and adjusting device for inspecting and adjusting the car audio AM tuner, a preprogrammed operation test adjusting program is built in, and the car audio AM tuner UUT is automatically inspected and adjusted. Main controller to control each device through GPIB interface and DIO interface, and the standard signal generator according to the control of the main controller A GPIB interface for controlling the operation of the oscilloscope and providing data from the oscilloscope to the main controller, a DIO interface for controlling the adjustment jig according to the control of the main controller, and a signal received from the modulation signal of the standard signal generator with an antenna. An antenna dummy unit converting an equivalent signal to a tuner UUT, a BPF for providing a multiplexer with a measurement signal from which noise is removed from the operating car audio set, and the car audio set under control of the DIO interface. A multiplexer for selecting and outputting one of a tuning voltage (VT) and a measurement signal from the BPF, a relay for switching according to the control of the DIO interface, and a corresponding audio input according to the operation of the relay. An input device to perform a voltage selected from the multiplexer or Buffers the call will be characterized by having him jojeongji comprising a buffer for output to an oscilloscope.

1 is a block diagram of a conventional car audio AM tuner inspection adjustment device,

2 is a block diagram of an adjustment jig for inspection adjustment of an easy-to-adjust car audio AM tuner according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Standard Signal Generator 2: Oscilloscope

3: antenna dummy jig 4: car audio set

5: Tuner UUT 10: Main controller

20: GPIB interface 30: DIO interface

40: adjustment jig 41: antenna dummy

42: BPF (Band Pass Filter) 43: Multiplexer

44: relay 45: input device

46: buffer

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the car audio AM tuner adjustment jig according to the present invention will be described with reference to the accompanying drawings. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

FIG. 2 is a block diagram of an adjustment jig for inspecting and adjusting an easy-to-adjust car audio AM tuner according to the present invention. Referring to FIG. 2, an easy-to-adjust car audio AM is shown. After the tuner adjustment jig is generated by modulating the standard signal in the standard signal generator 1, the modulated signal is supplied to the tuner UUT 5 through the antenna dummy part 41, and the tuner UUT 5 is connected to the car audio set 4. After tuning according to the tuning voltage (VT) from the) and demodulated and output to the car audio set (5), the signal processed in the car audio set (4) is output to the oscilloscope (2) to check the car audio tuner In the car audio AM tuner inspection and adjusting device, a preprogrammed operation test adjusting program is built in, and the car audio AM tuner UUT 5 is automatically checked and adjusted. To do this, use the GPIB interface and the DIO interface. Main controller 10 for controlling each device, GPIB interface 20 for controlling the operation of the standard signal generator and the oscilloscope under the control of the main controller 10, and at the same time to provide data from the oscilloscope to the main controller And the DIO interface 30 for controlling the adjusting jig 40 according to the control of the main controller 10 and the AM broadcast band according to the control of the main controller 10 through the DIO interface 30. An adjustment jig 40 for outputting the tuning voltage and the measurement signal to the oscilloscope is configured.

The adjustment jig 40 is an antenna dummy part 41 for converting the modulated signal of the standard signal generator 1 into a signal equivalent to the signal received by the antenna and providing it to the tuner UUT (5), the operation Under the control of the BPF 42 and the DIO interface 30, the measurement signal TS having the noise removed from the car audio set 4 being supplied to the multiplexer 43 and from the car audio set 4 is controlled. A multiplexer 43 for selecting and outputting one of a tuning voltage VT and a measurement signal TS from the BPF 42, a relay 44 for switching under the control of the DIO interface 30, In accordance with the operation of the relay 44, the input device 45 for performing the corresponding key input operation to the car audio set (4), and buffers the voltage or signal selected by the multiplexer 43 to output to the oscilloscope (2) It consists of the buffer 46.

The main controller 10 operates the car audio set 4 through the GPIB interface 20 and the DIO interface 30, and then controls the AM broadcast band to be selected accurately, and within the AM broadcast band. The standard signal generator 1 operates according to a program consisting of controlling a signal corresponding to the worst condition so that the best signal is measured.

The car audio set 40 supplies an electric power required to each internal device to make the operation state, and then detects a key input operation according to the input device 45 to tune the preset tuning voltage to the tuner UUT. A microcomputer 4-2 to be output to (5), a DC regulator 4-4 to supply the power, and an amplifier 4 to amplify and output the signal from the tuner UUT 5 to the BPF 42; -3) and cassette deck 4-1.

Operation according to the device of the present invention configured as described above will be described in detail below based on the accompanying drawings.

Referring to FIG. 2, the standard signal generator 1 shown in FIG. 2 is set to generate a predetermined signal and then modulate and output the predetermined signal. The intensity of the output modulation signal is a broadcast signal. This signal is set to the signal strength corresponding to the hearing loss area of the mountainous area.

In the main controller 10 according to the present invention, when the relay 44 in the adjusting jig 40 is controlled for AM broadcast band selection through the DIO interface 30, the input device 45 according to the operation of the relay 44 is performed. As the band switch is toggled to the AM broadcast band, the car audio set 4 performs key input corresponding to the AM broadcast band selection. At the same time, the main controller 10 controls the multiplexer 43 to select the tuning voltage VT through the DIO interface 30.

The microcomputer 4-2 in the car audio set 4 senses the key input and supplies a predetermined tuning voltage VT corresponding to the key input to the external tuner UUT 5 of the car audio set 4. do. In addition, the tuning voltage VT is provided to the oscilloscope 2 through the multiplexer 43 and the buffer 46. The main controller 10 operates the oscilloscope 2 through the GPIB interface 20. The oscilloscope 2 displays the provided tuning voltage VT and simultaneously supplies the tuning voltage VT to the main controller 10 through the GPIB interface 20.

The main controller 10 checks whether the provided tuning voltage VT corresponds to the AM broadcast band selection controlled through the relay 44, and if so, proceeds to the next step of the tuner UUT inspection. If the first broadcast AM band selection does not correspond, the DIO interface 30, the relay 44, and the input device 45 sequentially input the key corresponding to the AM broadcast band selection in the manner described above. The control is performed again, and the control is repeated until the tuning voltage VT provided from the car audio set 4 to the tuner UUT 5 corresponds to the AM broadcast band selection controlled through the relay 44. do.

In this way, to check the tuning voltage (VT), the car audio has an AM tuner and an FM tuner. In the present invention, in order to measure only the AM tuner of the car audio, the AM broadcast band is properly selected by the tuner UUT (5). You need to automatically check if it's done.

In the case where the AM broadcast band selection is properly selected and the tuner UUT 5 operates as an AM tuner, the main controller 10 next operates the standard signal generator 1 through the GPIB interface 20. At the same time, the multiplexer 43 selects the measurement signal TS through the DIO interface 30.

The modulated signal (400 Hz sine wave modulated signal) generated by the standard signal generator 1 is provided to the tuner UUT 5 through the antenna pile 41, and the tuner UUT 5 is connected to the selected AM tuner. It operates to receive and modulate the modulated signal, demodulates it and outputs it to the car audio set 4.

The amplifier 4-3 of the car audio set 4 amplifies the signal from the tuner UUT 5 to a predetermined magnitude and then outputs the amplified measurement signal TS. Noise is eliminated while passing through. The signal from which the noise is removed is provided to the oscilloscope 2 through the multiplexer 43 and the buffer 46, and the measurement signal TS provided from the oscilloscope 2 is transferred to the main controller through the GPIB interface 20. 10) is provided.

On the other hand, the main controller 10 performs the operation of adjusting the adjustment terminal (not shown) formed in the tuner UUT 5 through an adjustment device (not shown), and repeatedly receiving and inspecting the measurement signal. The control terminal adjusts the adjustment terminal to an optimal state, that is, a signal set to a worst condition in a condition where reception sensitivity of the tuner UUT 5 is good.

According to the control of the main controller 10, a technology and an apparatus for adjusting the control terminal on the tuner UUT 5 with an adjusting device are not shown in the art, and thus, detailed descriptions thereof are omitted. According to the car audio AM tuner adjustment jig of the present invention, which is easy to adjust, the broadcast band for testing is automatically selected and set, and the best signal can be received under the worst conditions for the set broadcast. So that it can be automatically adjusted.

According to the present invention as described above, by allowing the automatic adjustment of the AM tuner in the waveform inspection regulator for adjusting the AM (AM) tuner, not only the inspection and adjustment time is shortened, but also the uniformity of the product It is possible, and accordingly there is an effect that can improve the overall quality.

The above description is only a description of one embodiment of the present invention, the present invention is capable of various changes and modifications within the scope of the configuration. In addition, those skilled in the art will readily recognize that the adjustment is not limited to the car audio AM tuner adjustment jig or the above-described embodiment.

Claims (1)

When the standard signal generator 1 generates a modulated standard signal and then supplies a modulated signal to the tuner UUT 5 through the antenna pile part 41, the tuner UUT 5 is tuned from the car audio set 4. After tuning according to the voltage (VT) and demodulated and output to the car audio set (4), the signal processed in the car audio set (4) is output to the oscilloscope (2) to check and adjust the car audio tuner In the car audio AM tuner inspection adjusting device, a GPIB interface and a DIO are built in a pre-programmed operation inspection adjusting program to automatically check and adjust the car audio AM tuner UUT 5. GPI for controlling the operation of the standard signal generator and the oscilloscope under the control of the main controller 10 and the main controller 10 through an interface, and at the same time providing data from the oscilloscope to the main controller. The B interface 20, the DIO interface 30 for controlling the adjusting jig 40 under the control of the main controller 10, and the modulated signal of the standard signal generator 1 are equivalent to the signals received by the antenna. BPF 42 which provides a multiplexer 43 with an antenna dummy part 41 which is converted into a conventional signal and provided to the tuner UUT 5 and a measurement signal TS which removes noise from the car audio set 4 in operation. And a multiplexer for selecting and outputting one of a tuning voltage VT from the car audio set 4 and a measurement signal TS from the BPF 42 according to the control of the DIO interface 30. 43, a relay 44 for switching according to the control of the DIO interface 30, and an input device 45 for performing a corresponding key input operation to the car audio set 4 according to the operation of the relay 44. And the oscilloscope 2 by buffering the voltage or signal selected by the multiplexer 43. Adjustments are easy to characterized in that it comprises an adjusting jig 40 including a buffer 46 for outputting a car audio-M-(AM) tuner adjustment jig.