Identity-ROM emulator for Multi Channel Access wireless apparatus

Abstract: A test equipment for an MCA (Multi Channel Access) wireless apparatus (10), which evaluates and judges the correct operation of the MCA wireless apparatus by sending thereto and receiving therefrom check signals by the operation of a keyboard of a personal computer (11), wherein the change of the ROM incorporated in the MCA wireless apparatus is not necessary when the functions of the MCA wireless apparatus is checked.

Description: The present invention relates to a Multi-Channel Access (MCA) test equipment for testing an MCA wireless apparatus having a processing section. In the method of checking the correct operation of an MCA wireless apparatus, i.e., whether the apparatus correctly reads the contents of its ROM and transmits or receives radio waves of the frequencies complying with the written indications, it is necessary to check it with respect to each of the combinations of an area code, a channel code, a system code, a tone code, a group code and a user code which have been written in an ID.ROM, included in the apparatus, as data. In practice, there has been employed such a checking method that the operating condition of an MCA wireless apparatus is checked with an MCA tester connected thereto wherein channel setting tools are inserted one by one to the apparatus in place of its ROM. According to the above method, it has been difficult to automatize the evaluation since the ROM to be inserted to the operating transceiver section should be manually replaced for each check item. Furthermore, since a great number of ROMs written with various data are necessary, it has been troublesome to control and maintain these ROMs. Also, when the evaluation should be made with specific data, it has wasted a lot of time to search for that specific ROM. At present, the total number of bits of the codes is 22, so that the number of combinations of the code numbers is 2 22 , Therefore, it is necessary to provide a great number of ID.ROMs whose number will be the quotient of 2 22 divided by the memory capacity of a ROM. For this reason, it is the present practice to substitute channel setting tools for the ID.ROMs for performing the entire test. According to the method, in which the above-described channel setting tools are used, it can be ascertained by an MCA measuring device that the wireless apparatus correctly performs its transmission and reception operation in accordance with the area code (1), system code (2), user code (3), tone code (4) and channel code (5) complying with the set channel. However, the checking method with the channel setting tools is only effective as a simplified method, and the conditions thereof are different from those in the market in which the MCA wireless apparatus will be actually used. Furthermore, when checking items which are randomly selected with respect to each of the area code, channel code, system code, tone code, group code and user code have to be changed, it is necessary to program the new checking items in the ROM, which leads to an inevitable decrease of work efficiency. In the article, "Automatic Measurement for Mobile Radio Unit" H.Komagata, "Review of the Electrical Communication laboratories", Vol.30, No.2, March 1982, pp.380-391, Tokyo JP, an automatic measurement and test system for mobile radio units is described. As is shown in Fig. 3 of said article, in-circuit testing is applied, i.e. several parts of the mobile unit can be tested by plugging in cables at several modules of the mobile unit, such as between a logic unit and an RF unit. In order to solve the above-described problems, according to the present invention, the MCA test equipment is characterized in that it comprises an MCA measuring device having performance-evaluation means, and a memory section, the processing section being arranged or introducing a performance-evaluating signal into the memory section and for transferring the performance-evaluating signal to the measuring device, the processing section further being arranged to transfer a check signal to both the wireless apparatus and to the MCA measuring device, the wireless apparatus being arranged to transfer a response signal to the MCA measuring device in response to the check signal, whereby the MCA measuring device is arranged to carry out an analysis to the response signal and to transfer a result of the analysis to the processing section which comprises evaluation means so as to test the correct operation of the wireless apparatus. More, specifically, the MCA wireless apparatus, which is the actual operating portion, is connected to an MCA measuring device having performance-evaluating functions and to a memory section for introducing performance-evaluating signals. A personal computer is provided between the MCA measuring device and the memory section, the personal computer being capable of evaluating response signals from the MCA measuring device and introducing desired checking items into the memory section to thereby store them. The relevant checking signal is then sent to the MCA wireless apparatus of which response signal is analyzed by the MCA measuring device which have received the same checking signal from the personal computer. Then, the personal computer automatically evaluates the results to thereby evaluate the correct operation of the actual operating portion. According to the above-described method, analysis as to the correct operation of an MCA wireless apparatus, which has conventionally been made through a complicated hand-work of changing a number of ROM cards for each checking item, can be made automatically and at a high work efficiency by changing the checking items by the operation of a keyboard or by programs. It has also become possible to test the actual apparatus in a condition very similar to the actual operating condition by providing each of the NCA measuring device and the MCA wireless apparatus with an antenna to transmit radio waves from the measuring device to the MCA wireless apparatus so that a matching to the signal from the memory is made. Furthermore, it has become possible to sequentially carry out function checks, in an auto-scanning fashion until a predetermined number of samples are completed, by providing the check result (acceptance/rejection) signal ultimately received by the personal computer after passing through around the checking circuit elements with a function of sending out the next check signal. (Operation and Embodiments) First embodiment Fig. 1 shows the structure of an MCA test equipment for an MCA wireless apparatus according to the present invention. As shown, an ID.ROM section of the wireless apparatus 10 is replaced with a memory section 12 of a personal computer 11. Respective code numbers of desired area code, system code, tone code, user code and channel code are stored in this memory section 12 by an operation of a keyboard or an activation of programs. At the same time, the respective code-number data designated by the operation of the keyboard are transferred from the personal computer to a measuring device 13. Based on the transferred data, a channel designating signal is outputted from the measuring device 13, and a check signal is sent from the personal computer to the memory section 12 in accordance with this response signal. The code number stored in the memory section 12 is then transmitted to the wireless apparatus 10 whereby checking of the wireless apparatus is commenced. (Refer to Fig. 4) Reference numerals 1, 2, 3,... represent an area code, a system code, a tone code, a user code and a channel code, respectively. A response signal from the wireless apparatus 10 is sent to the measuring device which analyzes this signal, and based on which the personal computer evaluates whether the operation of the wireless apparatus was correct or not. The above checking operation can be made for each channel with any desired data. Since the measurement data can be altered, for example, by the manipulation of the keyboard, any number can be randomly selected from among all possible combinations and the measurement can be done automatically. Second Embodiment Fig. 2 shows another example of the MCA wireless apparatus according to the present invention in which antennae 14 are provided respectively in the MCA measuring device 13 and the MCA wireless apparatus 10 as constituent elements of this invention. The MCA measuring device 13 and the MCA wireless apparatus 10 are brought into a communication state, whereby the timing control function for operation-starting acknowledgement and receiving acknowledgement are activated in accordance with the matching oepration in the MCA wireless apparatus 10. More specifically, the function equivalent to the wireless station in the actual operating state is implemented by the MCA measuring device 13, and the check number signal is sent through the radio wave transmitted between the antennae 14, so that the MCA wireless apparatus 10 can be checked in conditions equivalent to the actual testing conditions. Third Embodiment Fig. 3 shows a further example of the MCA test equipment for an MCA wireless apparatus according to the present invention in which the personal computer 11 is provided with a scan display section 15. The check results, which are ultimately sent to the personal computer after passing through around the checking circuit elements of this invention, are visually displayed on the scan display section 15 so that the results are visually recognized by the operator. Also, the visual display of the check result (acceptance/rejection) signal is rendered a signal for transmitting the predetermined next check number to the memory section 12 and the measuring device 13 so that the function checking is sequentially carried out in an auto-scanning fashion until predetermined number of samples are completed. According to the above method, the acceptance/rejection results of the check numbers up to the number of samples, of which checks have been completed, are displayed on the scan display section 15 with the programmed symbols. By printing out the results, it becomes possible to reserve the test results and also it will become easy to cope with faulty products. (Effects of the Invention) The MCA test equipment for an MCA wireless apparatus according to the present invention makes it possible to automatize the evaluation process which has conventionally been performed by manually changing the ROMs. Also, it may become possible to omit the control and maintenance of ROMs, time required to search for desired ROMs and operation needed to write checking items into RAMs. The costs for rewriting ROMs to alter their contents may not be necessary any more. Furthermore, since the contents of the memory section can be altered, by the employment of the MCA test equipment according to the invention, it has become possible to randomly evaluate the operation of MCA wireless apparatuses by selecting any desired channel by altering the data through the operation of the keyboard or the setting by the programs. It has also become possible to test an MCA wireless apparatus in conditions similar to the actual conditions by providing the apparatus and the MCA measuring device with antennae. Conventionally, each time one checking procedure is completed, it has been necessary to prepare for the next checking which has required complicated arrangements. However, by the employment of the auto-scanning, it has become possible to carry out such checking sequentially and to omit the above arrangements. The MCA test equipment for an MCA wireless apparatus according to the invention uses IC memories in place of the ID.ROM. It is therefore possible to quickly rewrite the ROMs whereby the costs and time required by the entire checking process can be reduced. 4. Brief Description of the Drawings Fig. 1 is a block diagram of an MCA test equipment for an MCA wireless apparatus according to the invention; Fig. 2 is a block diagram of another MCA test equipment for an MCA wireless apparatus according to the invention wherein antennae are used; Fig. 3 is a block diagram of a further MCA test equipment for an MCA wireless apparatus according to the invention wherein the personal computer section is provided with a scan display section; and Fig. 4 is a diagrammatic illustration showing the checking function of an MCA test equipment for an MCA wireless apparatus according to the invention. 1 --- area code, 2 --- system code, 3 --- user code, 4 --- tone code, 5 --- channel code, 10 --- wireless apparatus, 11 --- personal computer, 12 --- memory, 13 --- measuring device, 14 --- antenna, and 15 --- scan display section.

Claims: A Multi-Channel Access test equipment (MCA) (11,12,13) having a processing section (11) for testing an MCA wireless apparatus (10) characterized in that the test equipment (11,12,13) comprises an MCA measuring device (13) having performance-evaluation means, and a memory section (12), the processing section (11) being arranged for introducing a performance-evaluating signal into the memory section and for transferring the performance-evaluating signal to the measuring device (13), the processing section (11) further being arranged to transfer a check signal to both the wireless apparatus (10) and to the MCA measuring device (13), the wireless apparatus (10) being arranged to transfer a response signal to the MCA measuring device (13) in response to the check signal, whereby the MCA measuring device (13) is arranged to carry out an analysis to the response signal and to transfer a result of the analysis to the processing section (11) which comprises evaluation means so as to test the correct operation of the wireless apparatus (10). An MCA test equipment (11,12,13) as claimed in Claim 1, wherein the check signal is transferred to the wireless apparatus (10) via the memory section (12). An MCA test equipment (11,12,13) as claimed in Claim 1, wherein the wireless apparatus (10) and MCA measuring device (13) comprise respective transceivers (14), and measuring device (13) is arranged to transmit the check signal to the wireless apparatus (10) by radio wave, so that the wireless apparatus (10) is tested in a condition similar to an actual operating condition. An MCA test equipment (11,12,13) as claimed in Claims 1, 2 or 3, whereby, when the MCA wireless apparatus (10) is connected to the MCA measuring device (13) and to the memory section (12), the memory section (13) acts as an ID-ROM emulator for the MCA wireless apparatus (10), a signal representative of a test acception/rejection result, which passes through all the circuit portions constituting the test circuit and which is ultimately sent to the processing section (11), is given a function of triggering to transfer a next check signal, whereby successive checks are performed in an auto-scanning way until a predetermined number of test samples have been completed.

Inventors: KANAZAWA TAKUMI, SAKAI TOSHIHARU, SHINDO SEIICHI, TAKASU YASUO, KANAZAWA, TAKUMI, SAKAI, TOSHIHARU, SHINDO, SEIICHI, TAKASU, YASUO
Applicants: PHILIPS ELECTRONICS NV, PHILIPS ELECTRONICS N.V.
Application year: 1989
Main classification: H04M1
IPC codes: H04M1, H04W24