JP2002135152A - Confirmation method of turning to wireless signal and listening equipment of wireless sound - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means with which the tuning of communication frequency with a communication partner can be performed readily. SOLUTION: In this equipment, a wireless signal obtained as a low-frequency signal from a radio set is added to two band-pass filters 1, 2 which have different center frequencies; their signals are made to pass and each is added to loudspeakers 5, 6, after they have been amplified by the first and second amplifiers 3, 4. The wireless sounds of quasi-stereo sounds can be listened from the loudspeakers 5, 6; the sounds are positioned at nearly the center of two loudspeakers 5, 6, when the communication frequency is tuned with the one of the communication partner, so that confirmation of tuning can be performed by these sounds.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for synchronizing the carrier frequencies of mutual radio telecommunications in radio telecommunications using telegraphs, and more particularly to improving the ease of tuning operation. The present invention relates to a method for confirming the synchronization of a telegraph signal and a telegraph sound listening device capable of listening to a comfortable telegraph sound.

[0002]

2. Description of the Related Art There are various forms of communication in amateur radio communication, as in business-use radio communication. Among them, communication using a telegraph signal is relatively small compared to voice communication. Since it is possible to communicate with a distant place even with electric power, amateur wireless communication is a communication form that is difficult to discard. By the way, in this amateur radio telecommunication, in order to match (tune) the transmission frequency of the own station to the transmission frequency of the other party, for example, in the case of a so-called transceiver in which a transmitter and a receiver are integrated, usually, It is common to turn a dial that performs both reception frequency operation and transmission frequency operation so that the telephony sound of the communication partner has a predetermined tone. That is, the transmission frequency is usually set to be the same as that of the communication partner when the telephony has a predetermined tone.

[0003]

However, the above-mentioned tuning operation requires familiarity, especially when there is a station having a strong signal level or noise near the communication frequency. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a method and apparatus for confirming the synchronization of a telegraph signal that can easily tune a communication frequency with a communication partner in wireless telecommunication. Another object of the present invention is to
It is an object of the present invention to provide a telegraph sound listening device that can comfortably listen to a telegraph sound even among interference and noise.

[0004]

SUMMARY OF THE INVENTION In order to achieve the object of the present invention, a method for confirming the synchronization of a telegraph signal according to the present invention is a method for confirming the tuning of a communication frequency with a communication partner in wireless telecommunications. The telegraph signal obtained as a low-frequency signal from the machine is passed through two band-pass filters having different center frequencies, and the telegraph signal after passing through the band-pass filter is applied to separate electric signal / sound conversion elements, By arranging the two electric signal / sound conversion elements at appropriate intervals and adjusting the tuning frequency of the wireless device, the telecommunication sound from the two electric signal / sound conversion elements is used to generate the two electric signals / sounds. It is assumed that the communication frequency with the communication partner has been tuned by having been localized at the center of the sound wave conversion element.

In such a method, a telegraph signal obtained as a low-frequency signal is passed through two band-pass filters having different center frequencies to be simulated as a stereo signal and listened to the center of the sound. Since the presence or absence of the tuning can be confirmed by confirming the localization to the device, the tuning can be easily performed without requiring skill in the tuning operation, unlike the related art.

In order to achieve the object of the present invention, a telegraph sound listening apparatus according to the present invention comprises two band-pass filters having different center frequencies to which a telegraph signal obtained as a low-frequency signal from a radio is applied. A first amplifier for amplifying an output signal of one of the two band-pass filters, and a second amplifier for amplifying an output signal of the other of the two band-pass filters. An amplifier; a first electrical signal connected to the first amplifier;
A sound wave conversion element, and a second electric signal / sound wave conversion element connected to the second amplifier.

[0007] Such a configuration is suitable for executing the above-described method for confirming the synchronization of a telegraph signal, and furthermore, after confirming the tuning, the telegraph sound can be heard in a pseudo stereo state.
This makes it possible to listen to the telegraph sound more comfortably than before.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the present invention. First, the configuration of a telegraph sound listening device (hereinafter, referred to as “the present device”) according to an embodiment of the present invention will be described with reference to FIG. The apparatus includes first and second band-pass filters ("BPF1" in FIG. 1 respectively)
1 and the first and second amplifiers (“AMP1” and “AMP1” in FIG. 1, respectively).
2) and first and second loudspeakers 5 and 6 as first and second electric signal / sound wave conversion elements, and a radio receiver (not shown) Alternatively, a low-frequency output signal (so-called audio output signal) of a wireless transceiver is applied to the first and second band-pass filters 1 and 2 for use. The first and second band-pass filters 1 and 2 allow only signals within a predetermined frequency range to pass through among the frequency components of telegraph sound output as a low-frequency signal from a radio receiver (not shown). Its basic configuration is a well-known and well-known band-pass filter. The first and second bandpass filters 1 and 2 in the embodiment of the present invention have different center frequencies. That is, the center frequency of the first band-pass filter 1 and the center frequency of the second band-pass filter 2 are set slightly different from each other. The difference between the center frequencies is, for example, several tens Hz.
More specifically, about 50 Hz is suitable. Although the frequency bandwidths of the first and second bandpass filters 1 and 2 are the same, the frequency bandwidth does not need to be limited to a specific value here. May be variously set in accordance with.

A first amplifier 3 is connected to the output end of the first band-pass filter 1, while a second amplifier 4 is connected to the output end of the second band-pass filter 2. The signals that have passed through the filters 1 and 2 are respectively amplified. In addition, these 1st and 2nd
Are low-frequency amplifiers having a well-known structure. The output terminal of the first amplifier 3 is connected to the first speaker 5, while the output terminal of the second amplifier 4 is connected to the second speaker 6.
Note that a so-called headphone (not shown) may be connected instead of the first and second speakers 5 and 6.

Next, a description will be given of a method of use and operation of the present apparatus in such a configuration. Note that this description will be replaced with the description of the method of confirming the synchronization of a telegraph signal. First, as a precondition, a wireless receiver (or a wireless transceiver) is applied to input terminals of the first and second bandpass filters 1 and 2 so that a low-frequency output signal of a wireless receiver (or a wireless transceiver) (not shown) can be applied. Suppose that the low-frequency output terminals are connected via wiring (not shown). The first and second speakers 5 and 6 are suitable for the user to be able to hear the sound from the first speaker 5 with one ear and the sound from the second speaker 6 with the other ear. The speakers are installed at appropriate intervals, and the user listens to the telegraphic sound at a position substantially opposite to the first and second speakers 5 and 6. Further, when the communication equipment has a configuration including a radio receiver and a radio transmitter, the transmission frequency of the radio transmitter is also changed by operating the dial for adjusting the reception frequency of the radio receiver to change the reception frequency. It is assumed that a so-called transceive operation is set so as to change in conjunction with it, and similarly to the related art, when the received sound has a predetermined tone, its own transmission frequency is configured to match the transmission frequency of the communication partner. It is assumed that

[0011] Under such a premise, first, the frequency tuning dial of the radio receiver (or radio transceiver) is operated so that the telephony sound of the communication partner can be tentatively heard in an appropriate state. Next, the frequency tuning dial is fine-tuned so that the telegraph sounds from the first and second speakers 5 and 6 are located at the center of the first and second speakers 5 and 6, and the telegraph sound becomes the first sound.
And by locating to the center of the second speakers 5 and 6, the communication frequency with the communication partner is matched (tuned). Then, the user can listen to the telegraph sound with the pseudo stereo sound from the two speakers 5 and 6.

The first and second amplifiers 3 and 4 can be omitted if the output level of the low-frequency signal from the radio receiver (or radio transceiver) is sufficient, and are necessarily provided. It is not necessary.

[0013]

As described above, according to the present invention,
Since the telegraph sound is converted into a pseudo-stereo sound and the position of the sound is used for confirmation of tuning, unlike the related art, tuning can be easily performed without requiring skill in tuning operation. Further, by listening to the telephony sound converted into the pseudo stereo sound, it is possible to obtain an effect that comfortable listening can be performed even in the case of interference or noise as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration example of a telegraph sound listening device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 1st bandpass filter 2 ... 2nd bandpass filter 3 ... 1st amplifier 4 ... 2nd amplifier 5 ... 1st speaker 6 ... 2nd speaker

Claims (2)

[Claims] 1. A method for confirming the tuning of a communication frequency with a communication partner in wireless telecommunications, comprising passing a telegraph signal obtained as a low-frequency signal from a radio through two band-pass filters having different center frequencies. At least
The telegraph signal after passing through the band-pass filter is applied to separate electric signal / sound wave conversion elements, and the two electric signal / sound wave conversion elements are positioned at appropriate intervals to adjust the tuning frequency of the radio. And the telecommunication sound from the two electric signal / sound conversion elements is localized at the center of the two electric signal / sound conversion elements, whereby the communication frequency with the communication partner is tuned. Telegram signal tuning confirmation method. 2. A band-pass filter having a different center frequency to which a telegraph signal obtained as a low-frequency signal from a wireless device is applied; and an output signal of one of the two band-pass filters. A first amplifier for amplifying, a second amplifier for amplifying an output signal of the other band-pass filter of the two band-pass filters, and a first electric signal / sound wave connected to the first amplifier A telegraphic sound listening device, comprising: a conversion element; and a second electric signal / sound wave conversion element connected to the second amplifier.