JPH045769U - - Google Patents
Info
- Publication number
- JPH045769U JPH045769U JP4591990U JP4591990U JPH045769U JP H045769 U JPH045769 U JP H045769U JP 4591990 U JP4591990 U JP 4591990U JP 4591990 U JP4591990 U JP 4591990U JP H045769 U JPH045769 U JP H045769U
- Authority
- JP
- Japan
- Prior art keywords
- signals
- catv
- ghosts
- broadcast wave
- preventing
- 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
- 230000005684 electric field Effects 0.000 claims 2
- 230000003321 amplification Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 230000005855 radiation Effects 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 1
Landscapes
- Closed-Circuit Television Systems (AREA)
- Details Of Television Systems (AREA)
Description
第１図は本考案のゴースト防止用Ｖ／Ｕヘツド
エンド装置を用いた集合住宅テレビで受信システ
ムの構成図、第２図は第１図のゴースト防止用Ｖ
／Ｕヘツドエンド装置２の一実施例の構成図、第
３図は従来の集合住宅テレビ受信システムの構成
図、第４図は第３図の双方向ブースタ５の動作を
説明する図である。
１……保安器、２……ゴースト防止用Ｖ／Ｕヘ
ツドエンド装置、３……直列ユニツト、４……テ
レビ受信機、５……双方向ブースタ、６……Ｖ／
Ｕ変換器、７……双方向ブースタ、８……ＵＨＦ
増幅器、９……双方向ブースタ、１０……ＣＡＴ
Ｖ信号、２０，２０ａ……テレビ受信機入力、３
１……ＣＡＴＶ下り信号、３２，３２ａ……放送
波下り信号。
Fig. 1 is a block diagram of a reception system for an apartment TV using the ghost prevention V/U head end device of the present invention, and Fig. 2 is a diagram of the ghost prevention V/U head end device of the present invention.
3 is a block diagram of an embodiment of the /U head end device 2, FIG. 3 is a block diagram of a conventional television reception system for an apartment complex, and FIG. 4 is a diagram explaining the operation of the two-way booster 5 shown in FIG. 1...Protector, 2...Ghost prevention V/U head end device, 3...Series unit, 4...TV receiver, 5...Two-way booster, 6...V/U
U converter, 7...bidirectional booster, 8...UHF
Amplifier, 9...bidirectional booster, 10...CAT
V signal, 20, 20a...TV receiver input, 3
1... CATV downlink signal, 32, 32a... Broadcast wave downlink signal.
Claims (1)
に存在する高層集合住宅にＣＡＴＶ伝送信号を引
き込む分配増幅部に配設し、ＶＨＦ帯域の放送波
信号をＵＨＦ帯域に周波数変換して供給するとと
もにメツセージ伝送用のＣＡＴＶ下り信号および
ＣＡＴＶ上り信号の交信も可能とする手段を備え
て前記放送波信号に対する高電界のゴーストを防
止することを特徴とするゴースト防止用Ｖ／Ｕヘ
ツドエンド装置。 It is installed in a distribution amplification unit that draws CATV transmission signals into high-rise residential buildings located in areas with high electric fields due to the radiation of broadcast waves in the VHF band, and converts the broadcast wave signals in the VHF band to the UHF band and supplies them, as well as transmitting messages. 1. A V/U head end device for preventing ghosts, characterized in that the device includes means for enabling communication of CATV downstream signals and CATV upstream signals, thereby preventing high electric field ghosts on the broadcast wave signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4591990U JPH045769U (en) | 1990-04-27 | 1990-04-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4591990U JPH045769U (en) | 1990-04-27 | 1990-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH045769U true JPH045769U (en) | 1992-01-20 |
Family
ID=31560530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4591990U Pending JPH045769U (en) | 1990-04-27 | 1990-04-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH045769U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3555430A (en) * | 1969-04-22 | 1971-01-12 | Anaconda Wire & Cable Co | Television receiver converter |
| JPS6163176A (en) * | 1984-09-04 | 1986-04-01 | Matsushita Electric Ind Co Ltd | CATV terminal device |
-
1990
- 1990-04-27 JP JP4591990U patent/JPH045769U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3555430A (en) * | 1969-04-22 | 1971-01-12 | Anaconda Wire & Cable Co | Television receiver converter |
| JPS6163176A (en) * | 1984-09-04 | 1986-04-01 | Matsushita Electric Ind Co Ltd | CATV terminal device |
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