JPH0346603Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is used in wireless communication devices, especially in the case where the communication device main body and control panel are separated. Regarding structure. [Prior Art] In a wireless communication device, it is common for large fixed service stations to install the main body of the communication device and the control panel separately. A large number of transmission lines for different purposes are installed between them and used for control and transmission.
Since there is no problem with the purpose of sparing expense and effort, this is outside the purpose of the present invention. An example of a wireless communication device to which the present invention is applied is a vehicle-mounted communication device. For in-vehicle communication devices with a transmission output of about 5 watts or less, the transceiver 5 is often installed under the car's dash board as shown in Figure 4A, making it convenient for the driver to operate it himself. . This position is close to the vehicle's battery 4, which serves as a power source, and is also convenient for receiving power from the cigarette lighter section, and is relatively convenient for connecting to the antenna 6 installed on the roof top or roof side. Roof top antennas and roof side antennas are good for small VHF and UHF bands, but slightly larger HF and VHF band full-size antennas are attached to the rear bumper as shown in step 3, so an antenna feeder is required. It must be extended from the front to the rear of the vehicle, and there are many problems with drilling holes in the vehicle body and holding the feeder. In addition, for medium-sized or larger transceivers with an output of 10 watts, it is likely that the transceiver body 1 is installed in the rear trunk as shown in Figure 4B, and its operation is performed using a control panel 2 installed near the dart board. Antenna 3 attached to the rear bumper
The feeder 13 connected to the transceiver 13 can also be short, so it is an optimal arrangement for high-frequency operation. is transmitted from control panel 2,
Furthermore, a large number of lines 12 are required to transmit received audio signals, S-meter instructions, etc. from the transceiver body 1 to the control panel 2, which is even more problematic than the antenna feeder extension described above. [Problems to be Solved by the Invention] The present invention solves the problem in the prior art by extremely compressing the multi-circuit transmission circuit that connects the transceiver body and the control panel 2, and by sharing it with the power supply circuit. The object of the present invention is to provide a transceiver structure that substantially eliminates the need to install a transmission line. [Means for solving the problem] This invention is a type of radio (mainly transceiver) in which the main unit and its control panel are separated, and the control panel allows operation control commands to be sent to the communication device main unit and voice from the microphone. As a means of transmitting signals and transmitting the operating status of the communication device main unit and received signals to the control unit, a common power supply that connects the main unit and the control panel unit converts all transmitted commands and signals into digital data. A separate wireless communication device characterized in that it transmits data through a line,
The outline of FIG. 1 will be explained below. FIG. 1 shows an example of the configuration of a wireless communication device in which a transceiver body 1 and a control panel 2 are separated.
The transceiver main body 1 and the control panel 2 are installed in the rear trunk, etc., which is close to the transceiver and does not get in the way of installation, and the control panel 2 is installed at the bottom of the dash board, etc., which is convenient for operation. All the operating commands and audio signals necessary for transceiver operation can be transmitted by simply connecting the transceiver with the power line 21. Details of the operation commands and audio signals required here will be described in the examples below, but both digital and analog signals are used, but in the present invention, all of these signals are converted to digital signals. It is transmitted on the common power supply line 21. Since various operations are not performed at the same time, command signals are transmitted sequentially, but in addition to this, audio signals require normal transmission, so audio can be transmitted in 8K.
When sampled at Hz and converted into an 8-bit digital code, the maximum speed is about 70 kb/s, and a telephone modem or the like can be used as a modem to send and receive this. [Embodiment] Fig. 2 shows the control panel section 2 of an embodiment of the present invention, and it is easier to use if the structure is similar in appearance to the panel section of a normal transceiver.
For example, as shown in FIG. 2, the operating (transmission/reception) frequency is adjusted with a tuning dial 22, and the frequency or channel number is displayed on a display 23. To set the operating frequency in the transceiver main unit 1, if a general PLL oscillation circuit is used, adjust the dial 22 on the control panel by transmitting digital data to set the division ratio of the programmable frequency divider. Set by
This is done by transmitting it to the main body 1 via the power supply circuit 21. Frequency memory switch 24
a, 24b, and 24c store digital data generated by the dial 22 in the RAM, and can call out a predetermined frequency as needed regardless of the position of the dial 22, which is the same as the memory function in a transceiver. The volume adjustment 25 is for adjusting the volume of the speaker built into the control panel section 2 or externally attached.It is good if it can be done directly inside the control panel 2 along with the squelch adjustment 26, but it is not necessary to do it on the main body section 1. In some cases, electronic variable resistors are controlled by digital data. The basic technology can be applied directly to the remote control system for television receivers. The microphone output is transmitted through the microphone jack 27 and the microphone gain 28 in the audio frequency range (300Hz~
(approximately 3 kHz) at 8 kHz and transmits it as an 8-bit digital code to the transceiver body 1 through the power line 21, converts it back to an analog signal, and modulates the transmitted wave. For transmission, the received audio, output power, received signal strength, etc. are digitally encoded from the transceiver main unit and sent to the power supply line 21.
The data is transmitted to the control panel section 21 through. The circuit configuration for transmitting digital signals to the power supply line is shown in FIG. A modulator and an amplifier for sending the various digital signals to the power supply line, and a modem (MODEM) for restoring the input signal from the power supply line to the original digital signal through the amplifier and detector. 7 is a transceiver main body 1 and a control. The same type as the panel part 2 can be used, and it is connected to the power supply line through the coupling capacitor 8. The power line 21A of the transceiver main body 1 is led through the LPF 10A which prevents the transmission power from going around, but since the cut-off frequency of this LPF may be extremely high, it does not interfere with the passage of digital data transmitted through the power line. In addition, the internal power supply circuit side supplies DC power through a chain 9A that has sufficient impedance at the transmission frequency, but these 9A and 10 have a convenient structure for use because they have the effect of removing noise from the outside. . On the control panel section 2 side, a digital signal is separated from the power supply line 21B by using an LPF 10B having the same structure as the above 10A on the external power supply side and a chain 9B having the same structure as the above 9A on the internal power supply side. The in-vehicle power supply (battery) line is connected to the transceiver main body 1 through the power supply line 21A from the power supply branch 11 through the power supply line 9C, which has the same structure as 9A above, and the power supply line 21B is connected to the control panel 2 .
However, since the power supply branch 11 is normally located at a suitable location near the control panel section 2 , this section may be combined with the control panel section 2 and the power supply line 21B may be omitted. [Effects of the invention] This invention separates the transceiver body and the control panel section and installs them in convenient locations, making it possible to omit all the various connection lines required between the two, and of course eliminating the necessary connection lines. It is convenient to install only the power supply line, and by keeping the digital communication format the same even for multiple transceiver bodies with different frequency bands and radio wave formats, a single control panel can be used. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention, FIG. 2 is an external view of the control panel section, FIG. 3 is a circuit diagram of an embodiment of the present invention, and FIGS. 4A and 4B are diagrams of conventional configurations. 1 ...Transceiver body, 2 ...Control panel, 3, 6...Antenna, 4...Battery,
5...Small transceiver, 7 ...Modem, 8...
Coupling capacitor, 9A, 9B, 9C...Choice coil, 10A, 10B...LPF, 11 ...Power supply branch, 21, 21A, 21B...Power line.

Claims (1)

[Scope of utility model registration request] In a wireless communication device in which the main body and its control panel are separated, power is supplied by connecting the positive power supply side to the core wires 21A and 21B of the coaxial cable via a chiyoke coil 9C, and the negative power supply side to the core wires 21A and 21B of the coaxial cable. The core wire 21A is connected to the shield jacket and grounded, and the core wire 21A is connected to the LPF 1 of the transceiver main body 1.
0A, one side is connected to the power supply terminal from the chiyoke coil 9A, the other side is connected from the capacitor 8 to the transmitting and receiving signal circuit, and one side is connected to the chiyoke coil 9B from the core wire 21B through the LPF 10B of the control panel section 2 . This is a separate type wireless communication device having a configuration in which one terminal is connected to a power supply terminal, and the other is connected to a transmitting and receiving signal circuit from a capacitor 8.