JPH0918915A - Fault diagnostic method and its device for radio call receiver - Google Patents

Abstract

PURPOSE: To prevent the reliability of acceptance from being deteriorated due to fading a call radio wave and to improve the efficiency of diagnosis. CONSTITUTION: An input section 11 inputs the model of a pocket pager 2 under test and a subscriber number and uses a caller device 21 to call the pocket pager 2. A calling radio wave is received and demodulated by an RF call signal reception demodulation section 10 to obtain pocket pager data such as ID, the data are given to an RF call signal reproduction section 5, from which an RF call signal is reproduced and a transmission line cell (box) 9 is energized by the signal to generate a uniform and stable call radio wave with a minimum electric field strength to be received in the inside. A control section 12 sets and controls a reception frequency band of an RF reception section 13, a carrier frequency and its frequency shift of a modulation section 6, and the adjustment value of a level adjustment section 8. A call tone sent from the tested pocket beeper 2 is picked up by a microphone 25 arranged in a transmission line cell 9 to discriminate defect based on the presence of an output by a control section 12 and to allow a printer 26 to print out the result.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio call receiver (pager) fault diagnosis method and apparatus, and more particularly to improvement of work efficiency of fault diagnosis.

[0002]

2. Description of the Related Art The first method of this kind of failure diagnosis that has been conventionally performed is to call a pager under test using a public telephone line, that is, dial the subscriber number of the pager under test with a telephone. The pager under test judges whether the pager is good or not by receiving the ringing radio wave transmitted from the base station and generating a ringing tone.

In the second method, as shown in FIG. 2, a failure diagnosing device including an ID information reading / displaying / sending device (for example, a personal computer) 4, a general-purpose signal generator 5 and a transmission line cell (box) 9 is used. Is the way. The failure diagnosis procedure in this case is performed as follows. Based on the model code and subscriber number displayed on the pager of the pager under test 2, check the carrier frequency, frequency deviation width and minimum electric field strength of the model from the table provided, The modulation unit 6 and the level adjustment unit 8 of the general-purpose signal generator 5 are adjusted so as to be suitable.

The pager 2 to be tested is connected with the connecting cord 3.
The pager information (including ID) corresponding to the subscriber number is read out from the pager and stored, and is displayed on the display 4a. Either of the order of and may be first. The pager 2 to be tested is removed from the connection cord 3 and placed at a predetermined place in a transmission line cell (box) 9 that generates a uniform electromagnetic field.

By operating the buttons of the ID information reading / display device, the data such as the ID stored is stored in the signal generator 5.
The carrier wave is FM-modulated by the data, an RF ringing signal for the pager under test is generated, the transmission line cell 9 is energized by the signal, and a ringing radio wave having a predetermined electric field strength is generated inside. Whether the pager under test 2 rings or not is judged as good or bad.

[0006]

The first method of calling a pager under test using a conventional public telephone line is that the state of the calling radio wave reaching the pager under test is unstable due to the influence of a building, a car, or the like. (Fading), so good
There was a problem that the reliability of the rejection result was not sufficient.

The second method using the conventional failure diagnosis apparatus is to read pager information such as ID from the sample in order to generate a ringing radio wave for the pager to be tested, or to adjust the carrier frequency according to the model code and subscriber number. However, it takes a considerable amount of time and labor such as manually setting the frequency shift amount and the electric field strength, and there is a problem that the efficiency of the diagnostic work is not sufficient.

An object of the present invention is to solve these conventional problems so as not to reduce the reliability of the pass / fail judgment due to fading of the calling radio wave and to improve the diagnostic work efficiency.

[0009]

[Means for Solving the Problems]

(1) In the failure diagnosis device according to claim 1, the subscriber number and model code of the receiver (pager) for the radio call under test are input from the input unit, and based on the subscriber number input by the calling device, Call the pager via a public line. The RF receiving unit receives the pager calling radio wave transmitted from the base station. The output of the RF receiver is demodulated by the demodulator, and the output of the demodulator is waveform-reproduced by the waveform regenerator. The modulator frequency-modulates (FSK) the carrier wave with the output of the waveform regenerator. The transmitter amplifies and outputs the output of the modulator. The transmission line cell (box) houses the pager under test and is energized by the output of the transmitter to generate a uniform electromagnetic field inside. The power for energizing the transmission line cell is adjusted by the level adjusting means inserted on the input side, output side or inside of the transmitting section. The control unit sets the reception frequency band of the RF reception unit, the carrier frequency of the modulation unit and its frequency shift width, and the adjustment amount of the level adjuster based on the model code and subscriber number of the pager under test. .

(2) In the invention of claim 2, in the above (1), a microphone for picking up the ringing sound of the pager under test is provided in the transmission line cell (box), and the control section outputs the microphone. The presence or absence of the pager is monitored to determine whether the pager under test is good or bad, and the determination data is displayed or recorded on an internal or external display or recording device.

(3) The invention of claim 3 corresponds to a failure diagnosing method which is performed by using the failure diagnosing device of the above (1).

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention is shown in FIG. According to the present invention, in order to eliminate the trouble of reading the pager information such as ID from the pager under test, the pager under test is called by using a general public line, and the radio wave from the base station is received by the failure diagnostic device. A stable ringing radio wave having a predetermined electric field strength according to the above is automatically reproduced and applied to the pager to be tested.

Specific failure diagnosis is performed as follows. The pager 2 to be tested is installed in the transmission line cell (box) 9. Pager under test 2 using the input unit 11 such as a numeric keypad
The model code (for example, 2 digits) and subscriber number of
To enter. The control unit 12 reads the information of the built-in memory in which the comparison table of the model code / subscriber number and the carrier frequency / frequency shift width / electric field strength is written, and the RF receiving unit 13
, The carrier frequency of the modulator 6 and its shift amount, and the attenuation amount (or gain) of the level adjusting unit 8 are automatically set and controlled.

The control unit 12 activates the calling device 21,
The subscriber number information is given, and the calling device 21 uses the general public line 2
A call operation (dialing) to the pager 2 to be tested is performed via 2. The pager center 23 reads out pager information such as an ID corresponding to the subscriber number from the memory, and transmits a predetermined FS-modulated calling radio wave via the base station 24.

The ringing radio wave is received by the RF receiving unit 13, demodulated by the demodulator 14, and waveform-shaped by the waveform regenerator 15 to obtain data related to the pager such as ID of the pager 2 to be tested, and the RF ringing signal reproduction. Input to the part 5.
The above-described RF receiving unit 13, demodulator 14, and waveform regenerator 15 constitute an RF ringing signal receiving / demodulating unit 10.

The modulation unit 6 of the RF ringing signal reproduction unit 5 FM-modulates a carrier having a frequency preset by the pager data such as ID with a preset deviation width, and inputs the modulated wave to the RF transmitter 7. To do. The RF transmitter 7 amplifies the power of the input FM modulated wave and supplies it to the level adjuster 8. The level adjusting unit 8 gives an attenuation amount (or gain) preset by the control unit 12 to the FS modulated wave, that is, the RF ringing signal, and supplies it to the transmission line cell (box) 9. The modulator 6, the RF transmitter 7, and the level adjuster 8 constitute the RF call signal reproduction unit 5. Although the level adjusting unit 8 is on the output side of the RF transmitting unit 7 in FIG. 1, it may be arranged on the input side of the RF transmitting unit or inside thereof.

In the transmission line cell (box) 9,
A ringing radio wave having the minimum electric field strength to be received by the pager under test is generated. If the pager under test is a non-defective item, the ringing tone is generated by receiving and demodulating the ringing radio wave, and if it is defective, no ringing tone is generated. The ringing tone is collected by the microphone 25 arranged in the transmission line cell (box) 9, and its electrical output is input to the control unit 12.

The control unit 12 determines that the microphone output exceeding the threshold value is good (OK), and if not, it is bad (NG), the determination result, the subscriber number, and the test date. The date and time are printed by the printer 26. It should be noted that it may be determined whether or not the tester can hear the ringing sound generated by the pager 2 to be tested. A display device can also be used as a device that outputs the determination result.

The present invention can also be applied to the case where the modulation / demodulation system between the base station and the pager adopts another modulation system other than the FSK (frequency modulation) system.

[0020]

According to the present invention, the ringing radio wave emitted from the base station
F-call signal receiving / demodulating unit (RF receiving unit 13, demodulator 14
And the waveform regenerator 15) to receive and demodulate, and the obtained pager data such as ID is input to the RF calling signal regenerator (comprising the modulator 6, the RF transmitter 7 and the level adjuster 8) 5. Then, the pager under test 2 reproduces a stable ringing radio wave having a minimum electric field intensity to be received and no fading, and a test is performed using this.
Therefore, the influence of fading as in the conventional first method is eliminated, and the reliability of the acceptance / rejection determination, which is conventionally unsatisfactory, can be significantly improved.

In the present invention, by simply inputting the model code (for example, two digits) and subscriber number of the pager under test,
Under the control of the control unit 12, (a) the frequency band of the RF reception unit 13, (b) the carrier frequency of the modulation unit 6 and its deviation width,
(C) The adjustment amount of the level adjusting unit 8 can be automatically and instantaneously set (the above (b) and (c) are manually performed in the past). Further, it is not necessary to read pager information such as ID from the pager under test as in the conventional case. Therefore, it is possible to reduce the manual labor time and labor, which has been a problem in the past, and to significantly improve the efficiency of the diagnostic work.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of a conventional pager failure diagnostic device.

Claims (3)

[Claims] 1. An input unit for inputting a subscriber number and a model code of a radio call receiver under test (hereinafter referred to as a pager), and an input unit for inputting the subscriber number and model code through a general public line based on the entered subscriber number. A calling device for calling a pager and an RF for receiving a pager calling radio wave transmitted from a base station
A receiver, a demodulator that demodulates the output of the RF receiver, a waveform regenerator that reconstructs the waveform of the output of the demodulator, and frequency modulation (FSK) of the carrier wave with the output of the waveform regenerator.
A transmission line cell (a transmission line cell for accommodating a modulation section, a transmission section that amplifies and outputs the output of the modulation section, and a pager under test, and is energized by the output of the transmission section to generate a uniform electromagnetic field inside ( Box), level adjusting means that is inserted on the input side, output side or inside of the transmitting unit and adjusts the power for energizing the transmission line cell, and based on the model code and subscriber number of the pager under test,
A radio call reception, comprising: a reception frequency band of the RF reception unit, a carrier frequency of the modulation unit, a control unit for setting a frequency deviation width thereof and an adjustment amount of the level adjuster, respectively. Machine failure diagnosis device. 2. The microphone according to claim 1, wherein a microphone for picking up the ringing sound of the pager under test is provided in the transmission line cell (box), and the control unit monitors whether or not the microphone output is present to perform the test under test. A failure diagnostic device for a radio paging receiver, characterized in that the pager is judged as good or bad and the judgment data is displayed or recorded on an internal or external display or recording device. 3. A pager under test is housed in a transmission line cell that generates a uniform electromagnetic field inside, and the pager under test is called through a general public line, and the calling radio wave is received / demodulated and waveform is reproduced. The calling data including the ID of the pager under test is obtained, the carrier wave is frequency-shift-modulated with the calling data, the transmission line cell is energized by the modulated wave, and the calling radio wave is reproduced therein. 2. A method for diagnosing a failure of a radio paging receiver, which is characterized by judging whether the pager under test is ringing or not.