JPS6070828A - Squelch level setting device - Google Patents
Squelch level setting deviceInfo
- Publication number
- JPS6070828A JPS6070828A JP17902983A JP17902983A JPS6070828A JP S6070828 A JPS6070828 A JP S6070828A JP 17902983 A JP17902983 A JP 17902983A JP 17902983 A JP17902983 A JP 17902983A JP S6070828 A JPS6070828 A JP S6070828A
- Authority
- JP
- Japan
- Prior art keywords
- squelch level
- squelch
- electric field
- output
- terminal
- 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
- Noise Elimination (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は無０受信機のスケルチレベル調整器する装置に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for adjusting the squelch level of a zero-zero receiver.
周波数変調波を受信する受イと機においてｔよ、受信入
力区界がないかあるいは非常に小さい場合に受信（表出
力から出るＦＭ雑音を抑圧する目的でスケルチ回路を設
けている。In a receiver that receives a frequency modulated wave, a squelch circuit is provided for the purpose of suppressing FM noise coming from the reception output when there is no or very small reception input area.
第１図はこのスケルチ回路を説明する／こめの従来の受
信機の構成例である。空中線１から入った電波は高周波
増幅器２で増幅された後、局部発振器３の出力と混合器
４で混合され、中間周波数に変換される。中間周波僧幅
器５の出力は周波数弁別器６で音声周波に変換さね、増
１［ｊ７器７を経てスピーカ８に出力される。一方、周
波数弁別器６の出力のうちの雑音成分はスケルチレベル
調整器９を経て、雑音増幅検波器］Ｏで、増幅検波され
、雑音量に応じて増幅器７の出力を断あるいは接にする
。FIG. 1 shows an example of the configuration of a conventional receiver to explain this squelch circuit. Radio waves entering from the antenna 1 are amplified by a high frequency amplifier 2, mixed with the output of a local oscillator 3 by a mixer 4, and converted to an intermediate frequency. The output of the intermediate frequency filter 5 is converted into an audio frequency by a frequency discriminator 6, and is output to a speaker 8 via an amplifier 7. On the other hand, the noise component of the output of the frequency discriminator 6 passes through the squelch level adjuster 9 and is amplified and detected by the noise amplification detector ]O, which turns off or closes the output of the amplifier 7 depending on the amount of noise.
スケルチレベル調整操作部としＣは第２図に示すように
筐体１１の一部の操作し易ｌＡ場所にソマミ１２が設け
られ、操作者が適当なレベルに調整できるようになって
いる。なお一部の受信機にはＳメータ１５と称する入力
電界表示器が設置されている場合がある。As shown in FIG. 2, the squelch level adjustment operation section C is provided with a solenoid 12 in a part of the housing 11 that is easy to operate, so that the operator can adjust the squelch level to an appropriate level. Note that some receivers may be equipped with an input electric field indicator called an S meter 15.
このように従来の受信機においてはスケルチレベルの設
定を操１′Ｅ者の勘にたよるところがあり、目盛１３に
よって調整し外ければならず、また受信機の感度が変動
してもそれが操作者には明確に判別できな−とｂう問題
があった。In this way, in conventional receivers, the setting of the squelch level relies on the intuition of the operator, who must make adjustments using the scale 13, and even if the sensitivity of the receiver fluctuates. There was a problem that the operator could not clearly distinguish between the two.
本発明の目的はスケルチレベル調整器の操作上の欠点を
除去し、スケルチレベルを適切々レベルに設定できるよ
うにしたスケルチレベル設定装置を提供することにある
。SUMMARY OF THE INVENTION An object of the present invention is to provide a squelch level setting device that eliminates the operational disadvantages of squelch level adjusters and allows the squelch level to be set appropriately.
前記目的を達成するために本発明によるスケルチレベル
設定装＠はスケルチレベル設定装置するスケルチレベル
、ν４檀手段と、前記スケルチレベル調整手段の指示可
動範囲に沿って設けら植また第１の表示部を有しており
、入力゛直昇強度に応じて前記第１の表示部を表示動作
させる第１の表示手段と、１油記、、ｇｌの表示部に沿
って設げられた第２の表示部を有しており、前記スケル
チレベル調整手段により調整さね、たスケルチレベルを
前記第２の表示部に表示動作させる第２の表示手段と、
前記入力電界強度が前記スケルチレベルを越えたときス
ケルチを開放する信号を出力する比較手段とを含み、前
記並設された入力電界強度およびスケルチレベルの表示
部を見ながらスケルチレベルの設定が可能なように構成
しである。In order to achieve the above object, the squelch level setting device according to the present invention includes a squelch level setting device, a squelch level setting device, and a first display section provided along the indicating movable range of the squelch level adjusting device. a first display means for displaying the first display section according to the input intensity; and a second display means provided along the display section of a second display unit having a display unit and displaying the squelch level adjusted by the squelch level adjustment unit on the second display unit;
and a comparison means for outputting a signal to release the squelch when the input electric field strength exceeds the squelch level, and the squelch level can be set while looking at the parallel input electric field strength and squelch level display parts. It is configured as follows.
前記構成により、ばスケルチレベルを適切に設定するこ
とが可能となり、本発明の目的は完全に達成できる。With the above configuration, it is possible to appropriately set the squelch level, and the object of the present invention can be completely achieved.
以下、図面を参照して本発明をさらに詳しく説明する。Hereinafter, the present invention will be explained in more detail with reference to the drawings.
第３図は本発明によるスケルチレベル設定装置の実施例
を示す図である。端子２１に周波数弁別器からの出力あ
るいは中間周波増幅回路にお込で中間周波数を検波整流
して得らハ、る受信機の入力電界に比例した直流に圧が
加えられる。この直流電圧は】０個のコンパレータ４゜
〜４９の入力端子の一方に加えられ、各コンパレータの
もう一方の入力端子には端子２２に入力される標準電圧
を抵抗３１で分圧した基準電圧がそれぞれ加えられる。FIG. 3 is a diagram showing an embodiment of the squelch level setting device according to the present invention. A pressure is applied to the terminal 21 to a direct current proportional to the input electric field of the receiver, which is obtained by detecting and rectifying the output from the frequency discriminator or the intermediate frequency input to the intermediate frequency amplifier circuit. This DC voltage is applied to one of the input terminals of the comparators 4 to 49, and the reference voltage obtained by dividing the standard voltage input to the terminal 22 by the resistor 31 is applied to the other input terminal of each comparator. Each can be added.
コンパレータ４０〜４９の一方の各入力端子は基準電圧
の低電圧側から順に接続されているので、端子２１に加
えられる入力電界の上昇に伴ない、コンパレータハ４０
．・・・・・・４９の順序で出力がオンする。各コンパ
レータの出力には第１の表示部である発光ダイオード列
１１０の各発光ダイオードが接続される。したがって、
発光ダイオード列１１０の各発光ダイオードは対応のコ
ンパレータの出力オンによって点灯する。上記コンパレ
ータ４０〜４９、抵抗３１および発光ダイオード列１１
０は第１の表示手段を構成する部分である。Since each input terminal of one of the comparators 40 to 49 is connected in order from the low voltage side of the reference voltage, as the input electric field applied to the terminal 21 increases, the input terminals of the comparators 40 to 49
．． ...The outputs are turned on in the order of 49. Each light emitting diode of the light emitting diode array 110, which is the first display section, is connected to the output of each comparator. therefore,
Each light emitting diode in the light emitting diode array 110 is turned on by turning on the output of the corresponding comparator. The comparators 40 to 49, the resistor 31 and the light emitting diode array 11
0 is a part constituting the first display means.
上述の抵抗３１で標準電圧を分圧して作られた各基準電
圧はコンパレータ５０〜５９の各入力端子にも加えられ
、他方の各入力端子にはスケルチレベルを調整する可変
抵抗３２の出力電圧が加えられる。基準電圧はコンパレ
ータ４ｏ〜４９の場合と同様、低い１圧はコンパレータ
５ｏ側に、そして高い電圧はコンパレータ５９側に接続
されるので、スケルチレベルの上昇に伴ない、コンノく
レータは５０・・・・・・５９の順序で出力がオンする
。Each reference voltage created by dividing the standard voltage by the above-mentioned resistor 31 is also applied to each input terminal of the comparators 50 to 59, and the output voltage of the variable resistor 32 for adjusting the squelch level is applied to each of the other input terminals. Added. Similar to the case of comparators 4o to 49, the reference voltage is connected to the comparator 5o side for the low voltage and the high voltage to the comparator 59 side. ...The outputs are turned on in the order of 59.
各コンパレータの出力には第２の表示部である発光ダイ
オード列１２０の各発光ダイオードが接続される。した
がって発光ダイオード列１２０の各発光ダイオードは対
応のコンノくレータの出力オンによって点灯する。Each light emitting diode of the light emitting diode array 120, which is a second display section, is connected to the output of each comparator. Therefore, each light emitting diode in the light emitting diode array 120 is turned on by turning on the output of the corresponding controller.
上記コンパレータ５０〜５９、抵抗３１および発光ダイ
オード列１２０は第２の表示手段を構成する部分でｂる
。The comparators 50 to 59, the resistor 31, and the light emitting diode array 120 constitute the second display means.
コンパレータ６０は端子２１に加えらノ１．る入力電界
強度屯圧と可変抵抗３２のスケルチレベルを比軸し、入
力電界強度による直流電圧がスケルチレベルより高くな
ったとき端子２３よりオン出力を出す。Comparator 60 is added to terminal 21 as well as No.1. The squelch level of the variable resistor 32 is proportional to the input electric field strength pressure, and when the DC voltage due to the input electric field strength becomes higher than the squelch level, an ON output is output from the terminal 23.
この端子２３の出力は第１図の音声増１−器７の音声出
力を断あるいは接にする制−信号として用−られる。抵
抗３１、ｉ′ｉＪ変抵抗３２およびコンノくレータ６０
はスケルチ回路として動作する部分である。The output of this terminal 23 is used as a control signal to disconnect or connect the audio output of the audio intensifier 7 shown in FIG. Resistor 31, i'iJ variable resistor 32 and connoctor 60
is a part that operates as a squelch circuit.
第４図は本発明に係るスケルチレベル俣作部の実施例を
示す図である。第１図の７’ｊＪ変抵抗３２を調整する
ツマミ１２が筐体の一部に設けられている。ツマミ１２
の周囲の筐体】１上には第３図の発光ダイオード列１１
０と１２０が２列に同心円状に配設されている。外側の
入力電界強度を表示する発光ダイオード列１１０および
内側のスケルチレベルを表示する発光ダイオード列１２
０はそれぞれ１０個づつの発光ダイオードが、用いられ
ているので１０段階表示が可能であり、電圧の上昇にし
たがってツマミ】２の左下より時計回りに順次点灯して
いく。FIG. 4 is a diagram showing an embodiment of the squelch level control section according to the present invention. A knob 12 for adjusting the variable resistance 7'jJ shown in FIG. 1 is provided in a part of the housing. Knob 12
The surrounding housing] 1 has a light emitting diode row 11 shown in FIG.
0 and 120 are arranged concentrically in two rows. A light emitting diode row 110 that displays the outer input field strength and an inner light emitting diode row 12 that displays the squelch level.
Since 10 light emitting diodes are used for each 0, a 10-step display is possible, and as the voltage increases, they light up sequentially clockwise from the bottom left of the knob 2.
実際のスケルチレベルの調整は入力Ｃに界強度表示を見
ながら雑音が気にならないレベルにスケルチレベルを設
定することに々る。The actual adjustment of the squelch level involves looking at the field strength display at input C and setting the squelch level to a level where noise is not a concern.
本発明は以上詳しく説明したように操作者はスケルチ設
定レベルを目盛で確認するのではなく、受信入力磁界と
比較しつつ最適のスケルチレベルを設定することができ
るので操作が容易となり、初心者にも非常に使い易いと
−う利点が生ずる。As explained in detail above, the present invention allows the operator to set the optimum squelch level by comparing it with the received input magnetic field instead of checking the squelch setting level on the scale, making the operation easy and even for beginners. The advantage is that it is very easy to use.
第１図は従来の受信機の一構成例を示すブロック図、第
２図は従来のスケルチ操作部の斜視図、第３図は本発明
によるスケルチレベル設定装置の一実施例を示す図、第
４図は本発明に係るスケルチ操作部の正面図である。
１・・・空中線 ２・・・高周波増幅器３・・・局部発
振器 ４・・・混合器
５・・・中間周波層＠器 ６・・・周波数弁別器７・・
・増幅器 ８・・・スピーカ
９・・・スケルチレベル調整器
１０・・・雑音増幅検波器 １１・・・筐体１２・・・
ツマミ １３・・・目盛り
１５・・・Ｓメータ ２１・・・端子
２２・・・端子 ２３・・・出力端子
３１・・・抵抗３２・・・可変抵抗FIG. 1 is a block diagram showing an example of the configuration of a conventional receiver, FIG. 2 is a perspective view of a conventional squelch operation section, and FIG. 3 is a diagram showing an embodiment of a squelch level setting device according to the present invention. FIG. 4 is a front view of the squelch operation section according to the present invention. 1... Antenna 2... High frequency amplifier 3... Local oscillator 4... Mixer 5... Intermediate frequency layer @ device 6... Frequency discriminator 7...
・Amplifier 8...Speaker 9...Squelch level adjuster 10...Noise amplification detector 11...Casing 12...
Knob 13...Scale 15...S meter 21...Terminal 22...Terminal 23...Output terminal 31...Resistor 32...Variable resistance
Claims (1)
段と、前記スケルチレベル調整手段の指示可動範囲に沿
って設けられた第１の表示部を有しており、入力電界強
度に応じて前記第１の表示部を表示動作させる第４の表
示手段と、前記第１の表示′部に沿って設けられた第２
の表示部を有して訃り、前記スケルチレベル調整手段に
より調整されたスケルチレベルを前記第２の表示部に表
示動作させる第２の表示手段と、前記入力電界強度が前
記スケルチレベルを越えたときスケルチを開放する信号
を出力する比較手段とを含み、前記並設された入力電界
強度およびスケルチレベルの表示部を見ながらスケルチ
レベルの設定が可能なように構成したスケルチレベル設
定装置ｔ。It has a squelch level adjustment means for adjusting the squelch level, and a first display section provided along an instruction movable range of the squelch level adjustment means, and the first display section is provided according to the input electric field strength. a fourth display means for displaying the part; and a second display means provided along the first display part.
a second display unit having a display unit and configured to display the squelch level adjusted by the squelch level adjustment unit on the second display unit; and when the input electric field strength exceeds the squelch level. and comparing means for outputting a signal for releasing the squelch when the squelch level is set, the squelch level setting device t being configured such that the squelch level can be set while looking at the input electric field strength and squelch level display sections arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17902983A JPS6070828A (en) | 1983-09-27 | 1983-09-27 | Squelch level setting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17902983A JPS6070828A (en) | 1983-09-27 | 1983-09-27 | Squelch level setting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6070828A true JPS6070828A (en) | 1985-04-22 |
Family
ID=16058862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17902983A Pending JPS6070828A (en) | 1983-09-27 | 1983-09-27 | Squelch level setting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6070828A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6455905A (en) * | 1987-08-27 | 1989-03-02 | Sony Corp | Receiver |
| JPH01286628A (en) * | 1988-05-13 | 1989-11-17 | Yaesu Musen Co Ltd | S meter display system |
| JPH0369940U (en) * | 1989-11-04 | 1991-07-12 | ||
| US5408694A (en) * | 1992-01-28 | 1995-04-18 | National Semiconductor Corporation | Receiver squelch circuit with adjustable threshold |
-
1983
- 1983-09-27 JP JP17902983A patent/JPS6070828A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6455905A (en) * | 1987-08-27 | 1989-03-02 | Sony Corp | Receiver |
| JPH01286628A (en) * | 1988-05-13 | 1989-11-17 | Yaesu Musen Co Ltd | S meter display system |
| JPH056377B2 (en) * | 1988-05-13 | 1993-01-26 | Yaesu Musen Kk | |
| JPH0369940U (en) * | 1989-11-04 | 1991-07-12 | ||
| US5408694A (en) * | 1992-01-28 | 1995-04-18 | National Semiconductor Corporation | Receiver squelch circuit with adjustable threshold |
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