JPS5533358A - Calling system of radio unit - Google Patents

Calling system of radio unit

Info

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
Application number
JP10588678A
Other languages
Japanese (ja)
Inventor
Choshichi Miyanaga
Tatsuya Orimoto
Takeshi Heiwa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Radio Co Ltd
Original Assignee
Japan Radio Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Japan Radio Co Ltd filed Critical Japan Radio Co Ltd
Priority to JP10588678A priority Critical patent/JPS5533358A/en
Publication of JPS5533358A publication Critical patent/JPS5533358A/en
Pending legal-status Critical Current

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  • 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
JP10588678A 1978-08-30 1978-08-30 Calling system of radio unit Pending JPS5533358A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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