JPS5533358A - Calling system of radio unit - Google Patents
Calling system of radio unitInfo
- Publication number
- JPS5533358A JPS5533358A JP10588678A JP10588678A JPS5533358A JP S5533358 A JPS5533358 A JP S5533358A JP 10588678 A JP10588678 A JP 10588678A JP 10588678 A JP10588678 A JP 10588678A JP S5533358 A JPS5533358 A JP S5533358A
- Authority
- JP
- Japan
- Prior art keywords
- reception
- call
- frequency
- switch
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Transceivers (AREA)
Abstract
PURPOSE: To increase the articulation of the priority call voice by having the press- to-talk call with call frequency f2 and in the double-wave press-to-talk system and then giving switching to the reception of frequecy f1 in case the check detection is given for the reception of priority frequency f1 in time division.
CONSTITUTION: With opening of switch 1, the call modulated wave of frequency f2 entered through antenna 2 features a reception action in which the modulated wave reaches speaker 5 via low frequency amplification part 4 after amplification/ detection 3. In this case, if the priority call signal of frequency f1 is received, the incoming of f1 is detected at detection control part 10 via amplifier/detector 3. This detection output is applied to transmission/reception and f1/f2 switching circuit 9, and then detector 3 is controlled via circuit 9 to switch only f1 to the perfect reception action regardless of switch 1 in order to secure a continuous output of the call signals to the speaker. Here switch 1 is closed to secure the transmission action, and thus curcuit 9 is controlled by the pulse of clock oscillator 7' to actuate transmission part 8. And the time division is given to the reception and transmission with f1 and f2 respectively. In such way, the articulation can be enhanced for the priority call voice.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10588678A JPS5533358A (en) | 1978-08-30 | 1978-08-30 | Calling system of radio unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10588678A JPS5533358A (en) | 1978-08-30 | 1978-08-30 | Calling system of radio unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5533358A true JPS5533358A (en) | 1980-03-08 |
Family
ID=14419398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10588678A Pending JPS5533358A (en) | 1978-08-30 | 1978-08-30 | Calling system of radio unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5533358A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01103326A (en) * | 1987-10-16 | 1989-04-20 | Aikomu Kk | Method for receiving plural frequencies of radio communication equipment |
-
1978
- 1978-08-30 JP JP10588678A patent/JPS5533358A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01103326A (en) * | 1987-10-16 | 1989-04-20 | Aikomu Kk | Method for receiving plural frequencies of radio communication equipment |
JPH0553409B2 (en) * | 1987-10-16 | 1993-08-10 | Icom Inc |
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