JPS54114917A - Radio unit for relay - Google Patents
Radio unit for relayInfo
- Publication number
- JPS54114917A JPS54114917A JP2234878A JP2234878A JPS54114917A JP S54114917 A JPS54114917 A JP S54114917A JP 2234878 A JP2234878 A JP 2234878A JP 2234878 A JP2234878 A JP 2234878A JP S54114917 A JPS54114917 A JP S54114917A
- Authority
- JP
- Japan
- Prior art keywords
- reception signal
- output
- locked loop
- phase locked
- fetching
- 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.)
- Granted
Links
Landscapes
- Radio Relay Systems (AREA)
Abstract
PURPOSE: To reduce the effect of interference waves when the reception signal is weak, by fetching the separate oscillation source output at the phase synchronous circuit, if the reception signal is less than the predetermined level.
CONSTITUTION: In the relay radio set having phase locked loop PLL, the reception less than the predetermined level can be detected by passing through it for example, the directional coupler BDC, filter NBP, rectifying circuit DD, and hysteresis circuit HYS. This detected output closes the switch XBT, starting the oxcillator XOS. The output is multiplied by n, being equal to the frequency of the reception signal, and it is fed to the phase locked loop PLL with the directional coupler CDC for signal fetching. ACcordingly, the phase locked loop continues normal operation by drawing the output of stable frequency after being lowered in the reception signal.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2234878A JPS54114917A (en) | 1978-02-28 | 1978-02-28 | Radio unit for relay |
GB7905255A GB2015278B (en) | 1978-02-25 | 1979-02-14 | Straight-through-repeater |
IT20362/79A IT1111748B (en) | 1978-02-25 | 1979-02-20 | PASS-THROUGH DIRECT REPEATER |
US06/015,364 US4253191A (en) | 1978-02-25 | 1979-02-26 | Straight-through-repeater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2234878A JPS54114917A (en) | 1978-02-28 | 1978-02-28 | Radio unit for relay |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54114917A true JPS54114917A (en) | 1979-09-07 |
JPS5750374B2 JPS5750374B2 (en) | 1982-10-27 |
Family
ID=12080156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2234878A Granted JPS54114917A (en) | 1978-02-25 | 1978-02-28 | Radio unit for relay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54114917A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5819777A (en) * | 1981-07-29 | 1983-02-04 | Fujitsu Ten Ltd | Display device for residual length of tape |
KR100383390B1 (en) * | 2000-10-31 | 2003-05-12 | 주식회사 텔레매틱스 | Adjacent Frequency Canceller with Nulling Loop |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0242467Y2 (en) * | 1984-10-24 | 1990-11-13 |
-
1978
- 1978-02-28 JP JP2234878A patent/JPS54114917A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5819777A (en) * | 1981-07-29 | 1983-02-04 | Fujitsu Ten Ltd | Display device for residual length of tape |
JPH0230113B2 (en) * | 1981-07-29 | 1990-07-04 | Fujitsu Ten Ltd | |
KR100383390B1 (en) * | 2000-10-31 | 2003-05-12 | 주식회사 텔레매틱스 | Adjacent Frequency Canceller with Nulling Loop |
Also Published As
Publication number | Publication date |
---|---|
JPS5750374B2 (en) | 1982-10-27 |
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