JPS6477324A - Transmission equipment - Google Patents
Transmission equipmentInfo
- Publication number
- JPS6477324A JPS6477324A JP23383087A JP23383087A JPS6477324A JP S6477324 A JPS6477324 A JP S6477324A JP 23383087 A JP23383087 A JP 23383087A JP 23383087 A JP23383087 A JP 23383087A JP S6477324 A JPS6477324 A JP S6477324A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- alarm signal
- output
- modulation
- wave
- 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
- Transmitters (AREA)
Abstract
PURPOSE:To prevent an adjacent channel from being affected by bad influence at the time of generating abnormality by outputting a carrier without modulation at the time of starting an automatic sweeping circuit and reducing a transmission output. CONSTITUTION:An alarm circuit 60 for detecting the start of the automatic sweeping circuit 4 in an LO 50 and generating an alarm signal is added, a phase modulator 6 stops modulation by the alarm signal from the circuit 60 and a power amplifier 7 attenuates its output by the alarm signal. When a PLL is asynchronized by a fault, the circuit 4 starts low frequency oscillation, so that an alarm signal is outputted. The phase modulator 6 generates its output without modulation and the power amplifier 7 reduces its output. Thereby, a wave such that an adjacent channel is interfered is not sent, and even if such a wave is slightly leaked, probability applying interference is extremely small because it is unmodulated wave.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23383087A JPS6477324A (en) | 1987-09-18 | 1987-09-18 | Transmission equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23383087A JPS6477324A (en) | 1987-09-18 | 1987-09-18 | Transmission equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6477324A true JPS6477324A (en) | 1989-03-23 |
Family
ID=16961231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23383087A Pending JPS6477324A (en) | 1987-09-18 | 1987-09-18 | Transmission equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6477324A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0895363A2 (en) * | 1997-07-30 | 1999-02-03 | Nec Corporation | Control of spurious emissions during transient states |
-
1987
- 1987-09-18 JP JP23383087A patent/JPS6477324A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0895363A2 (en) * | 1997-07-30 | 1999-02-03 | Nec Corporation | Control of spurious emissions during transient states |
US6320912B1 (en) | 1997-07-30 | 2001-11-20 | Nec Corporation | Digital modulator |
EP0895363A3 (en) * | 1997-07-30 | 2002-12-18 | Nec Corporation | Control of spurious emissions during transient states |
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