JPS54114917A - Radio unit for relay - Google Patents

Radio unit for relay

Info

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
Application number
JP2234878A
Other languages
Japanese (ja)
Other versions
JPS5750374B2 (en
Inventor
Takuro Oguchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2234878A priority Critical patent/JPS54114917A/en
Priority to GB7905255A priority patent/GB2015278B/en
Priority to IT20362/79A priority patent/IT1111748B/en
Priority to US06/015,364 priority patent/US4253191A/en
Publication of JPS54114917A publication Critical patent/JPS54114917A/en
Publication of JPS5750374B2 publication Critical patent/JPS5750374B2/ja
Granted legal-status Critical Current

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
JP2234878A 1978-02-25 1978-02-28 Radio unit for relay Granted JPS54114917A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0242467Y2 (en) * 1984-10-24 1990-11-13

Cited By (3)

* Cited by examiner, † Cited by third party
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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