IT1102050B - Digital transceiver system for selective-call radio circuits - uses digital control signals to switch two frequencies through to aerial - Google Patents
Digital transceiver system for selective-call radio circuits - uses digital control signals to switch two frequencies through to aerialInfo
- Publication number
- IT1102050B IT1102050B IT4789078A IT4789078A IT1102050B IT 1102050 B IT1102050 B IT 1102050B IT 4789078 A IT4789078 A IT 4789078A IT 4789078 A IT4789078 A IT 4789078A IT 1102050 B IT1102050 B IT 1102050B
- Authority
- IT
- Italy
- Prior art keywords
- control signals
- aerial
- selective
- frequencies
- digital
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 abstract 1
Landscapes
- Transceivers (AREA)
Abstract
The digital transceiver, for selective-call radio systems, has a generator producing two signals of different frequencies. Either the first or the second of these two signals can be applied to an aerial depending on either of two digital control signals. A keyboard is used to select manually digital messages for transmission. A processor is connected to the keyboard and generates either '1' or '0' by employing the first and second digital control signals.
Applications Claiming Priority (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/791,264 US4126831A (en) | 1977-04-27 | 1977-04-27 | Electronic phase detector circuit |
US05/791,256 US4140975A (en) | 1977-04-27 | 1977-04-27 | Highly selective programmable filter module |
US05/791,614 US4153876A (en) | 1977-04-27 | 1977-04-27 | Charge transfer device radio system |
US05/791,253 US4145656A (en) | 1977-04-27 | 1977-04-27 | Transceiver capable of sensing a clear channel |
US05/791,616 US4147984A (en) | 1977-04-27 | 1977-04-27 | Dual digital processor transceiver |
US05/791,611 US4145655A (en) | 1977-04-27 | 1977-04-27 | Digitally transmitting transceiver |
US05/791,629 US4132950A (en) | 1977-04-27 | 1977-04-27 | Clarifying radio receiver |
US05/791,265 US4137499A (en) | 1977-04-27 | 1977-04-27 | Signal strength measuring transceiver |
US05/791,450 US4162446A (en) | 1977-04-27 | 1977-04-27 | Transceiver with only one reference frequency |
US05/791,449 US4161697A (en) | 1977-04-27 | 1977-04-27 | Automatically clarifying radio receiver |
US05/791,254 US4132951A (en) | 1977-04-27 | 1977-04-27 | Digital processor controlled radio system |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7847890A0 IT7847890A0 (en) | 1978-02-02 |
IT1102050B true IT1102050B (en) | 1985-10-07 |
Family
ID=27582811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT4789078A IT1102050B (en) | 1977-04-27 | 1978-02-02 | Digital transceiver system for selective-call radio circuits - uses digital control signals to switch two frequencies through to aerial |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1102050B (en) |
-
1978
- 1978-02-02 IT IT4789078A patent/IT1102050B/en active
Also Published As
Publication number | Publication date |
---|---|
IT7847890A0 (en) | 1978-02-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19950111 |