JPH0443033U - - Google Patents
Info
- Publication number
- JPH0443033U JPH0443033U JP8301490U JP8301490U JPH0443033U JP H0443033 U JPH0443033 U JP H0443033U JP 8301490 U JP8301490 U JP 8301490U JP 8301490 U JP8301490 U JP 8301490U JP H0443033 U JPH0443033 U JP H0443033U
- Authority
- JP
- Japan
- Prior art keywords
- medium wave
- tunnel
- rebroadcasting
- field strength
- monitoring device
- 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
- 238000012806 monitoring device Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Near-Field Transmission Systems (AREA)
Description
第１図はこの考案の一実施例による、トンネル
内中波再放送装置を示す系統図、第２図はこの考
案の他の実施例によるトンネル内中波再放送装置
を示す系統図、第３図は従来の中波再放送装置を
示す系統図である。
図において、１はトンネル、２は受信アンテナ
、３は受信機、４は送信機、５は同軸ケーブル、
６は整合器、７は誘導線、８は終端器、９は電界
強度監視装置を示す。尚、図中、同一符号は、同
一、又は相当部分を示す。
FIG. 1 is a system diagram showing an in-tunnel medium wave rebroadcasting device according to one embodiment of this invention, FIG. 2 is a system diagram showing an in-tunnel medium wave rebroadcasting device according to another embodiment of this invention, and FIG. The figure is a system diagram showing a conventional medium wave rebroadcasting device. In the figure, 1 is a tunnel, 2 is a receiving antenna, 3 is a receiver, 4 is a transmitter, 5 is a coaxial cable,
6 is a matching box, 7 is a guide wire, 8 is a terminator, and 9 is a field strength monitoring device. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
送設備において、トンネル内に電界強度監視装置
を設置し、これにより、中波送信機の出力を制御
することを特徴とする中波再放送装置。 A medium wave rebroadcasting device that performs medium wave radio broadcasting in a tunnel, characterized in that a field strength monitoring device is installed in the tunnel, thereby controlling the output of a medium wave transmitter. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8301490U JPH0443033U (en) | 1990-08-04 | 1990-08-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8301490U JPH0443033U (en) | 1990-08-04 | 1990-08-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0443033U true JPH0443033U (en) | 1992-04-13 |
Family
ID=31630329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8301490U Pending JPH0443033U (en) | 1990-08-04 | 1990-08-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0443033U (en) |
-
1990
- 1990-08-04 JP JP8301490U patent/JPH0443033U/ja active Pending
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