JPS6261552U - - Google Patents
Info
- Publication number
- JPS6261552U JPS6261552U JP1985152945U JP15294585U JPS6261552U JP S6261552 U JPS6261552 U JP S6261552U JP 1985152945 U JP1985152945 U JP 1985152945U JP 15294585 U JP15294585 U JP 15294585U JP S6261552 U JPS6261552 U JP S6261552U
- Authority
- JP
- Japan
- Prior art keywords
- transmitting units
- output signal
- modulation section
- frequency
- head end
- 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
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Noise Elimination (AREA)
- Transmitters (AREA)
Description
第１図はこの考案による多チヤンネルＦＭ用ヘ
ツドエンドの１実施例のブロツク図、第２図は同
実施例のＦＭ出力信号とその高調波との関係を示
す図、第３図及び第４図は従来の多チヤンネルＦ
Ｍ用ヘツドエンドのＦＭ出力信号とこれと共に発
生する不要な信号との関係を示す図である。
２…混合部、４…送信部、８…発振・変調部、
３０…ローパスフイルタ。
Fig. 1 is a block diagram of an embodiment of the multi-channel FM head end according to this invention, Fig. 2 is a diagram showing the relationship between the FM output signal of the same embodiment and its harmonics, and Figs. 3 and 4 are Conventional multi-channel F
FIG. 3 is a diagram showing the relationship between the FM output signal of the M head end and unnecessary signals generated together with the FM output signal. 2... Mixing section, 4... Transmitting section, 8... Oscillation/modulation section,
30...Low pass filter.
Claims (1)
出する複数の送信部と、これら送信部の各出力信
号を混合する混合部とを有し、上記各送信部が、
比較的高い周波数である搬送波を直接に発振する
発振部を含むＦＭ変調部と、このＦＭ変調部の出
力信号が供給され、しや断周波数が上記出力信号
の高調波よりも低い周波数に選択されているロー
パスフイルタとを有する多チヤンネルＦＭ用ヘツ
ドエンド。 It has a plurality of transmitting units that FM modulate and transmit carrier waves of different frequencies, and a mixing unit that mixes the output signals of these transmitting units, and each of the transmitting units has:
An FM modulation section including an oscillation section that directly oscillates a carrier wave having a relatively high frequency, and an output signal of this FM modulation section are supplied, and a cutoff frequency is selected to be a frequency lower than the harmonics of the output signal. A multi-channel FM head end with a low-pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985152945U JPH0510434Y2 (en) | 1985-10-04 | 1985-10-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985152945U JPH0510434Y2 (en) | 1985-10-04 | 1985-10-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6261552U true JPS6261552U (en) | 1987-04-16 |
| JPH0510434Y2 JPH0510434Y2 (en) | 1993-03-15 |
Family
ID=31071385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985152945U Expired - Lifetime JPH0510434Y2 (en) | 1985-10-04 | 1985-10-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0510434Y2 (en) |
-
1985
- 1985-10-04 JP JP1985152945U patent/JPH0510434Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0510434Y2 (en) | 1993-03-15 |
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