JP3111535B2 - Receiver test method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a selective call receiver, and more particularly, to a method for testing a receiver.

[0002]

2. Description of the Related Art The reception sensitivity of a character display type selective calling receiver is defined, for example, as the sensitivity when no error occurs in 10 characters. A test mode is provided as in Japanese Patent Application Laid-Open No. Sho 60-42951. When a message is not transmitted and measurement is performed based on the subscriber's calling number, or when there is an error in the received message, the sound is changed to the sound without error. You can see what they do.

[0003] However, the error control is determined by the paging signal system. For example, CCIR RPC N
o. The information signal of signal system 1 (POCSAG system)
One of block codes called BCH (31, 21) codes enables random error correction of up to 2 bits.

[0004]

Since the error control is determined by the paging signal system, for example, if the measurement is performed with no error of 10 characters, the error cannot be detected under a certain condition. Is determined. This phenomenon is affected when the number of error correction bits is large. For this reason, the accuracy of the reception sensitivity measurement is poor, and much time is required for the measurement.

Therefore, the present invention provides a test mode for inspecting a receiver. In this test mode, two sets of memories for storing information signals (message data) are provided, and the contents of the two are compared. It is intended to provide a receiver.

[0006]

A test method for a receiver according to the present invention is a test method for a receiver which compares a preset own number with a received information number and detects a coincidence between them. , First storage means, second storage means, and control means for shifting to a test mode for testing the receiver. In the test mode, the first data is received in a predetermined electric field intensity. Storing the first data in the first storage unit, receiving the second data in a state where the electric field intensity is lower than the predetermined electric field intensity, and storing the second data in the second storage unit. Storing data; comparing the contents of the first storage unit and the second storage unit;
Thereafter, in a state where the electric field intensity is changed, the third data is received, the third data is stored in the second storage unit, and the contents of the first storage unit and the second storage unit are compared. And a step of performing

[0007]

When the test mode for measuring the receiving sensitivity is set, first, an error-free reference message is stored in the first storage unit. The received message after storing the message in the first storage unit is stored in the second storage unit. Then, the contents of the first storage unit and the second storage unit are compared, and if they are the same, a sound is emitted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In general, sensitivity measurement is an extension of a coaxial feed line used for high-frequency signal transmission. The intensity of an electric field generated internally by changing the power passing through a tester is arbitrarily set, and selectively called. This is performed by detecting the reception sound of the receiver.

Hereinafter, the present invention will be described in detail with reference to examples.
FIG. 1 is a block diagram of a selective call receiver according to the present invention. A desired radio frequency is demodulated by a radio unit 2 including a discriminator via a built-in antenna 1 and converted into a rectangular wave by a waveform shaping circuit 3. The power supply control circuit 4 that supplies power to the radio unit 2 and the waveform shaping circuit 3 is controlled by the control unit 5. The power supply control circuit 4 has means for supplying power to the radio unit 2 to receive a preamble signal, a sync signal, an address signal (individual call number) and an information signal (message data). The control unit 5 performs bit synchronization with the received signal, frame synchronization, battery saving means for reducing the power consumption of the radio unit 2 and the like, and a P-P in which the address signal from the radio unit 2 and the individual call number of the receiver are written. The comparison with the data from the ROM 6 (individual call number storage means) is performed with error control, and the control of the comparison means for determining whether or not the data is called is performed.

When the coincidence with the individual call number is confirmed, the information signal that follows is stored in a memory 9 (storage means) and used by an alarm device 8 such as a buzzer, LED or vibrator via an alarm drive circuit 7. Inform the person that the call was made. The stored message is sent to the LCD drive circuit 10 via the control unit 5 by the external operation member 13 composed of switches, and is displayed on the LCD display 12. The power switch 13a, which is a part of the external operation member, turns off the power switch 13a when it is not desired to receive a message, thereby extending the battery life. The control unit 5 and the LCD drive circuit 10 include a crystal oscillation circuit 1
1 sends a clock signal. Power supply control circuit 4, control unit 5, memory 9, LCD drive circuit 10, and oscillation circuit 11
Is composed of a one-chip microcomputer. A battery 15 supplies power to the selective call receiver.

FIG. 2 is a flowchart of a test mode according to the present invention. The selection between the test mode and the normal mode is performed by setting a test mode bit provided in a P-ROM (individual call number storage means). When the power is supplied by the power switch, the receiver proceeds to “power on” (20), reads the contents of the P-ROM, and determines whether the test mode bit is set “test mode set?” (21) Proceed to. If the test mode bit of the P-ROM has not been set, the process proceeds to the "normal reception process" (22) for performing the normal reception process, and the normal mode is set until the power switch is turned off as in the conventional case. If the test mode bit is set, the process proceeds to "test mode processing" (23) for performing a test mode display and a battery saving function, and
After this processing, the flow shifts to "reception" (24), which is in the reception standby state. Transmission is performed by setting the electric field strength in the tester to a level at which no error occurs. On the receiver side, the first
It is determined whether or not the message data is stored in the storage unit (means). If the message data is not stored, the process proceeds to "store in first storage unit" (26) where the received message data is stored in the first storage unit. The stored message data will be a future reference message. Then, the process again proceeds to "reception" (24), which is a reception standby state. Next, the sensitivity test is performed by lowering the electric field strength in the tester and increasing the electric field strength from bottom to top. When receiving, the receiver determines whether the message data is stored in the first storage unit. The process proceeds to “Store in first storage?” (25). This time, because the message data is stored, the received message data is stored in the second
The process proceeds to “store in second storage unit” (27) to be stored in the storage unit. Then, the process proceeds to "Message is the same?" (28) for comparing the message data stored in the first storage unit with the message data stored in the second storage unit received this time. The comparison of message data is based on the individual call number, function, BCH and message. If the message data is the same, a "sound" (2
Proceed to 9). Then, the counter that counts the number of receptions is incremented by one, and the counter that displays the contents of this counter is incremented by one.
1. Proceed to "Display counter contents" (30). Then, proceed to "Receive" (24), which is a reception standby state.If the message data is not the same, "Receive" (24) is again in the reception standby state In other words, no sound is heard, and the reception is invalidated.

In the embodiment, when the message data is the same, the sound is generated in step (29). However, the present invention is not limited to this, and the lighting of the LED or the sound and the LED lighting may be combined.

FIG. 3 is an example of a display diagram of the test mode of FIG. 2 according to the present invention. (A) is a test mode display in which the power is turned on by turning on the power switch, the test mode bit is set, and "test mode processing" (23) is executed. The contents of the counter for counting the number of receptions of three digits are displayed at the upper right. (B) is a display after executing the “store in first storage unit” (26) process. The message “1111122222” is registered (stored) in the first storage unit. (C) is the same as the message data registered after (b) in FIG.
(1) Display of counter contents ”(30) is executed. (D) is the same as (c) in FIG. (E) is received after (d) in FIG. This is a display when the data is different, and the sounding and the counter +1 are not performed.

When a reception count display function for counting reception is provided as in the embodiment, a single tester can simultaneously measure a plurality of receivers, and the measurement time can be further reduced. .

[0015]

As described above, according to the present invention, it is possible to provide a selective call receiver which can accurately measure sensitivity including a message in a short time.

[Brief description of the drawings]

FIG. 1 is a block diagram of a selective call receiver according to the present invention.

FIG. 2 is a flowchart of a test mode according to the present invention.

FIG. 3 is a display diagram in each step of FIG. 2;

[Explanation of symbols]

 2. Radio section 4. Power supply control 5. Control section 6. P-ROM 9 Memory 10. LCD drive circuit 13. External operation member 14. ... Message processing unit 15 ... Battery

Claims (1)

(57) [Claims] 1. A test method for a receiver for comparing a preset own number with a received information number and detecting a match between them, comprising: a first storage means, a second storage means, and the receiver And control means for shifting to a test mode for performing a test of the above. In the test mode, the first data is received and the first data is stored in the first storage unit in a predetermined electric field intensity. A step of receiving second data and storing the second data in the second storage unit in a state where the electric field strength is lower than the predetermined electric field strength; and Comparing the contents of the second storage unit, and thereafter, receiving the third data in the state where the electric field intensity is changed, storing the third data in the second storage unit, Comparing the contents of the storage unit and the second storage unit. A method for testing a receiver, comprising: