KR0167452B1 - Zig apparatus for test of decoding wafer - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to an apparatus for testing a decoding substrate in an optical cable TV, and more particularly, to a test apparatus capable of integrating several substrates into one substrate and facilitating testing and repair. The present invention relates to a key logic section 4 for converting an analog signal into a digital signal and keying a signal to be selected, a CPU 3 for receiving a signal from the key logic section 4 and controlling the device, and the CPU ( 3) a display unit for receiving the selected contents from 3) and displaying them, a signal selecting unit 1 for selecting a stereo mode or a TV mode under the control of the CPU, and a channel for selecting a stereo channel under the control of the CPU It consists of a selection unit.

Description

Jig Device for Testing Decoding Board

1 is a schematic block diagram of the prior art;

2 is a logic block diagram of the prior art shown in FIG.

3 is a schematic block diagram of an apparatus according to the invention.

Figure 4 is a block diagram showing in detail with respect to the jig substrate according to the present invention.

5 is a detailed view of the signal selector of FIG.

6 is a detailed view of the channel selector of FIG.

* Explanation of symbols for main parts of the drawings

1: signal selector 2: channel selector

3: key logic part 4: CPU

5: display unit 200: test jig

TECHNICAL FIELD The present invention relates to an apparatus for testing a decoding substrate in an optical cable TV, and more particularly, to a test apparatus that integrates several substrates into one substrate and makes it easy to test and repair.

Conventionally, in order to test a decoding board in an optical cable TV, a separate test jig device for testing a subscriber board of a SWAN system is used to test a decoding board using a DS3 class encoded directly without passing an optical cable in an existing system. It is known.

Such conventional techniques are shown in FIGS. 1 and 2. The prior art will be described with reference to the drawings.

1 is a schematic block diagram of prior art data conversion. In FIG. 1, an encoding board (ENCD) 10 is first inserted into a slot of a bus BUS that is a back plane board, wherein the encoding board (ENCD) 10 is inserted into a slot of a bus. The channel is determined from 1 to 14 depending on whether it is inserted into the slot. The encoding board (ENCD) 10 then receives an analog stereo or digital stereo, makes it a data format and transmits data and clock. The XMTB 20 receives the data and the clock, multiplexes 14 channels, and transmits the data to the DS3 level. On the other hand, the television encoding board (TENB) 30 receives and transmits the television signal to the DS3 class. The subscriber's decoding board (DECB) 40 receives the DS3 and decodes it.

FIG. 2 is a logic diagram for FIG. 1 and illustrates the operation of FIG. The analog signal is transmitted to the SWAN data format unit 90 through the CS5336 (50). The analog signal passing through the SWAN data format unit 90 is stored in the 8-bit storage device 110. At this time, the digital data is stored in the storage device 110 through the SWAN data format unit 90 like the analog data via the CS8412 (60). The analog data and the digital data stored in the storage device 110 are multiplexed by the 14 channel multiplexer 140 and transferred to the DS3 framer 160, and the DS3 framer 160 controls the DS3 under the control of the CPU 150. Formatted as a class.

The audio signal is delivered to the audio multiplexer 100 via the CS5536 70 where it is multiplexed and sent to the multiplexer 120. In this case, the video signal is converted into a digital signal by the analog-to-digital converter 80 and transmitted to the multiplexer 120 as well as the audio signal. The audio signal and the video signal are multiplexed by the multiplexer 120 and transferred to the DS3 framer 130 to be formatted in the DS3 level.

As described above, in the prior art, as shown in FIG. 1, 14 encoding boards (ENCDs) are inserted or corresponding channels on a bus when tested to identify each channel for stereo 14 channels on a subscriber's decoding board. The encoding substrate ENCD should be moved to the slot corresponding to the. Therefore, it is not only easy to identify each channel but also takes a long time.

In addition, in the above-described prior art, in order for the verification tester to provide arbitrary stereo data for the test, an arbitrary line must be connected after opening the data portion of the SWAN data format unit 90 of FIG. Therefore, the channel selection of the stereo cannot be easily done, which causes time and economic loss due to the hardware change for the verification tester. Also, in the prior art, for testing, the four substrates of the encoding substrate (ENCB), the TCMB, the television encoding substrate (TENB), and the XMTB are composed of the test jig and the volume is excessively large. Is not easy. Since it consists of several board | substrates as mentioned above, it is complicated at the time of manufacture, a lot of components are consumed, and it is difficult to repair in case of failure. And since it uses a back plan board | substrate for buses, it becomes expensive.

Accordingly, an object of the present invention is to provide a jig device for testing a decoding substrate, which is simple to use and saves money by integrating a complicated and difficult to handle into a single substrate composed of several substrates.

In addition, the present invention, in order to solve the problem that the user was difficult to select the channel of the stereo in the prior art, by using a key from the outside to easily select the channel to test out of the 14 channels of the stereo by generating a channel selection signal from the CPU Facilitate the channel of stereo.

Also, in the present invention, in order to solve a problem in which stereo data is conventionally impossible to arbitrarily send data in a desired direction by receiving only a signal for analog or digital, the CPU is forced to input data through a key from the outside. Made it possible.

The present invention is also divided into four types of substrates, the encoding board (ENCD), the television encoding board (TENB), the XMTB, and the TCMB, so that the four board functions are provided on one test board. Compressed. TCMB is for the bus, so it sends and receives signals to the encoding board (ENCD), XMTB and television encoding board (TENB) without going through them. The three boards are also set in TV mode and stereo mode under the control of the CPU. Reduce logic and parts for parts.

In order to achieve the above object, the present invention controls the device by receiving a signal from the key logic section 4, the key logic section 4 for converting an analog signal into a digital signal and keying a signal to be selected. CPU 3, a display unit 5 for receiving and displaying the selected contents from the CPU 3, a signal selection unit 1 for selecting a stereo mode or a TV mode under the control of the CPU, and control of the CPU. It consists of a channel selector for selecting a channel of the stereo by.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic block diagram of an apparatus according to the present invention, in which a jig substrate 200 is connected to a key input and display unit. The power supply 202 is connected to supply power to the jig substrate 200 and the decoding substrate 201. The jig substrate 200 and the decoding substrate 201 are connected through a DS3 line.

4 is a block diagram illustrating the jig substrate 200 in detail. As shown in the figure, if you want to supply a DS3-class signal for TV, first enter the TV mode. When a key is input to the TV mode, the key logic section 4 converts the analog signal into a digital signal so that the CPU 3 can recognize it. The CPU 3 gives the selected contents to the display section 4 and selects the TV mode to input the TV-audio signal to the signal selection section 1. The signal is encoded by the multiplexer unit along with the video signal through the CS5336 and the audio multiplexer to transmit a DS3-class signal.

Next, if you want to supply a DS3-class signal for stereo, first enter the stereo mode. When a key is input in the stereo mode, the key logic section 4 converts the analog signal into a digital signal so that the CPU 3 can recognize it. The CPU 3 gives the selected contents to the display section 4, and selects the stereo mode to use the CS5336 as a channel for the stereo signal at the time of analog signal input. Channel selection and data input by the user for output or stereo input signal are keyed, and the data to be tested from the channel selector (2) is made into DS3 level signal from the DS3 level framer through the 14 channel multiplexer and transmitted. do.

FIG. 5 is a detailed view of the signal selector 1 of FIG. 4, wherein the signal selector is composed of a decoder and a CS536 to select a TV audio signal, a stereo signal, etc. according to the TV / stereo selection signal. FIG. 6 is a detailed view of the channel selector of FIG. 4, which is composed of a decoder and two combination circuits. The channel selector receives stereo data, user data and a stereo / user selection signal through a decoder and selects 14 channels according to channel selection of 4 lines.

As described above, the present invention has various effects as follows. The test jig was easily constructed by using four boards of the conventional encoding board (ENCD), television encoding board (TENB), XMTB and TCBM as one board, and the test jig was miniaturized. The channel selection of stereo can be made by key input rather than hardware change, making the channel selection easy. By allowing the user to easily give stereo data, the decoded output signal can be predicted in advance, making it easy to repair. Through TV / stereo selection, the common logic is reduced, thereby reducing the number of components, thereby reducing the cost.

Claims (3)

A key logic section 4 for converting an analog signal into a digital signal and keying a signal to be selected; A CPU (3) for receiving a signal from the key logic section (4) to control the device; A display unit 5 which receives and displays the selected content from the CPU 3; A signal selector (1) for selecting a stereo mode or a TV mode under control of the CPU; And a channel selector which selects a stereo channel under the control of the CPU. The test jig apparatus according to claim 1, wherein the signal selector comprises a decoder and a CS5336 to select a TV audio signal, a stereo signal, or the like according to a TV / stereo selection signal. The test jig apparatus of claim 1, wherein the channel selector receives stereo data, user data, and a stereo / user selection signal through a decoder and selects 14 channels according to four channel selection signals.