JP2985048B2 - Operating frequency variable range limiting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating frequency variable range limiting system for a radio communication device.

[0002]

2. Description of the Related Art In a conventional radio communication device of this kind,
For example, when performing communication using different frequencies, the first VFO
(Hereinafter, referred to as VFO-1.) Used for receiving a second VFO (hereinafter, referred to as VFO-2.) By using for transmission the different split operation of transmitting and receiving frequencies, respectively (so-called sash hung Operation).

[0003]

However, in the prior art as described above, usually, the other station (receiving station) is fine-tuned by dialing the transmission frequency of the own station within a specified range (for example, ± 10 kHz). However, since there is no restriction on the variable range of the dial, the designated range of the transmission frequency may be greatly deviated, and effective operation cannot be expected.

The present invention has been made for the purpose of improving such disadvantages of a conventionally known radio communication device.

[0005]

The Figure 1 Means for Solving the Problems] In operation of the present invention, CP constituting the microcomputer 1
In response to the instruction of U1b, the microcomputer 1
Via the interface 1c, the receiving unit (VFO-1, R
X) 2 or transmission unit (VFO-2, TX) with any of the operation of the 3 transmission and reception switching unit (SW) 4 as the perating the Came ra switching
To

In response to the command from the microcomputer 1 , the receiving frequency of the receiving section (RX) 2 is set by the VFO-1.

Next, in response to the command from the microcomputer 1 , the VFO-2 sets information on a variable transmission frequency range specified by the transmission unit (TX) 3 , and further sets the setting information on the microcomputer. 1 memory 1a
To memorize.

[0008] Then, based on the prior SL information stored memory 1 a, transmitted by setting the variable range relative to the specified transmission frequency, also, any constant frequency (except the same transmission frequency ) Is received so that a reliable split operation can be performed.

[0009]

The CPU 1b constituting the microcomputer 1
Split operation and transmission / reception based on
The fit of the condition, interferon of the microcomputer 1
Esu 1c the receiver 2 via the transmission unit 3 and reception switching respectively set in section 4, and feeding said limited variation range by VFO-2 Shin portion 3 microcomputer 1
In the memory 1a .

[0010] Then, the memory 1 information stored in a, unless there is no change in the setting condition, act to optionally transmit a variable range relative to the transmission frequency.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the operating frequency variable range limiting method of the present invention will be described in detail with reference to the drawings.
a, while a built-in CPU1b and interface 1c
Hardware part of micro computer 1 and receiving part
2 , a radio configured by the transmission unit 3 and the transmission / reception switching unit 4
It consists hardware portion of the communication device, FIG. 2 prior Symbol microphone
4 is a flowchart of software in the computer 1 .

Note that P1 to P9 in FIG. 2 indicate the steps in the flowchart, and in the following text, the corresponding parts are shown in parentheses.

Upon receiving an instruction from the microcomputer 1 ,
Selecting a normal simplex mode by VFO-1 of the receiving unit 2, but received ShinAmane wavenumber at this time is the partner station station (P1).

Next, it is determined whether the split operation is performed or not (P2). When the split operation is performed, the reference frequency to be transmitted is confirmed by the VFO-2 of the transmitting unit 3 (P2).
3).

Further, a variable range is set around the reference frequency with a width of, for example, ± 10 kHz (P4).

It is determined whether or not the reference frequency of (P3) is changed as required (P5). If not changed, the split mode is set as it is (P8).

On the other hand, if the reference frequency is to be changed, it is determined whether or not the frequency of VFO-2 matches the limit value of (P4) at the changed reference frequency (P6).

At this time, if the limit values match, V
The variable range of FO-2 is set and stored (P7), but if they do not match, the flow returns to (P4).

Further, the variable range limit value of VFO-2 is set to the transmission frequency (P8), and the split operation is performed while dialing this endlessly.

It is determined whether or not to continue the split operation (P9).
If the flow does not continue, the flow returns to the flow of (P1).

[0021]

According to the present invention as described above, when switching to the operation in the normal operation or lath split mode by simplex mode, by limiting the variable range relative to the assigned frequency of the transmitter, designated This provides an excellent effect that the deviation of the transmission frequency range is prevented and the operability of the dial is improved.

[Brief description of the drawings]

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

FIG. 2 is a flowchart of a control program executed by a microcomputer .

[Explanation of symbols]

1 microcomputer 1a memory 1b CPU 1c interface 2 receiving unit (VFO-1, RX) 3 transmitting unit (VFO-2, TX) 4 transmission / reception switching unit (SW)

Claims (1)

(57) [Claims] A memory (1a), a CPU (1b), and a memory (1a).
Microcomputer constituted by interface (1c)
A transmitting unit in a wireless communication device having a computer (1) ;
(2), each operation of the receiving unit (3) and the transceiver switching unit (4)
The door and said to control Ri by the micro-computer (1)
Moni, among frequency for transmitting and receiving pre Me, arbitrarily and variably to a limited the transmission frequency, and the microcomputer to be operated while holding <br/> the reception frequency constant
(1) while controlled by, the operating frequency variable range limit scheme in which a frequency information, wherein the storing process by the microcomputer (1) of the transmission unit (2).