JP2501675Y2 - Reception local circuit for TACAN / DME - Google Patents

Reception local circuit for TACAN / DME

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Publication number
JP2501675Y2
JP2501675Y2 JP7809589U JP7809589U JP2501675Y2 JP 2501675 Y2 JP2501675 Y2 JP 2501675Y2 JP 7809589 U JP7809589 U JP 7809589U JP 7809589 U JP7809589 U JP 7809589U JP 2501675 Y2 JP2501675 Y2 JP 2501675Y2
Authority
JP
Japan
Prior art keywords
amplifier
tacan
dme
circuit
signal
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.)
Expired - Lifetime
Application number
JP7809589U
Other languages
Japanese (ja)
Other versions
JPH0317585U (en
Inventor
聡明 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP7809589U priority Critical patent/JP2501675Y2/en
Publication of JPH0317585U publication Critical patent/JPH0317585U/ja
Application granted granted Critical
Publication of JP2501675Y2 publication Critical patent/JP2501675Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 〔産業上の利用分野〕 本考案は航空機搭載用のTACAN・DME装置用受信ローカ
ル回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a receiving local circuit for a TACAN / DME device mounted on an aircraft.

〔従来の技術〕[Conventional technology]

従来、この種の受信ローカル回路は、第２図に示すよ
うに、周波数シンセサイザ回路１にて発生した連続波で
ある受信ローカル信号11を増幅器２にて増幅し、その出
力をLPF（ローパスフィルタ）４に通した後、受信回路
６のミキサー５に供給していた。2. Description of the Related Art Conventionally, as shown in FIG. 2, a receiving local circuit of this type conventionally amplifies a receiving local signal 11 which is a continuous wave generated in a frequency synthesizer circuit 1 by an amplifier 2 and outputs its output as an LPF (low pass filter). After passing through No. 4, it was supplied to the mixer 5 of the receiving circuit 6.

〔考案が解決しようとする課題〕[Problems to be solved by the device]

上述した従来の受信ローカル回路は、周波数シンセサ
イザにて発生した受信ローカル信号を連続波として増幅
器にて増幅し、その出力をLPFに通した後受信回路に供
給していたため、TACAN・DME装置が距離質問パルスを送
信する際、その送信パルスの受信入力への漏れ込みを受
信回路のミキサーにてIFに変換してしまい、その結果過
大入力による受信回路動作が一時的に不安定となるとい
う欠点がある。In the conventional receiving local circuit described above, the receiving local signal generated by the frequency synthesizer is amplified by the amplifier as a continuous wave, and the output is supplied to the receiving circuit after passing through the LPF. When transmitting the inquiry pulse, the leak of the transmission pulse into the reception input is converted to IF by the mixer of the reception circuit, and as a result, the operation of the reception circuit due to excessive input becomes temporarily unstable. is there.

〔課題を解決するための手段〕[Means for solving the problem]

本考案のTACAN・DME用受信ローカル回路は、航空機搭
載用TACAN・DME装置において、周波数シンセサイザと、
この周波数シンセサイザの発生した連続波である受信ロ
ーカル信号を増幅する増幅器と、この増幅器をTACAN・D
ME装置が距離質問パルスを送信する時のみ増幅しないよ
うに制御する増幅器制御回路と、前記増幅器の出力をフ
ィルタリングするローパスフィルタとを備えて構成され
る。The TACAN / DME receiving local circuit of the present invention is a frequency synthesizer for a TACAN / DME device mounted on an aircraft.
An amplifier that amplifies the received local signal that is the continuous wave generated by this frequency synthesizer, and this amplifier
The ME device is provided with an amplifier control circuit for controlling not to amplify only when transmitting the distance inquiry pulse, and a low-pass filter for filtering the output of the amplifier.

〔実施例〕〔Example〕

次に本考案について図面を参照して説明する。 Next, the present invention will be described with reference to the drawings.

第１図は本考案のTACAN・DME用受信ローカル回路の一
実施例のブロック図である。FIG. 1 is a block diagram of an embodiment of the receiving local circuit for TACAN / DME of the present invention.

周波数シンセサイザ１は、受信ローカル信号（連続
波）11を増幅器２に出力し、増幅器２は受信ローカル信
号（連続波）11を増幅して断続波の受信ローカル信号
（断続波）12を発生してこれをLPF4に出力する。The frequency synthesizer 1 outputs a received local signal (continuous wave) 11 to an amplifier 2, and the amplifier 2 amplifies the received local signal (continuous wave) 11 to generate an intermittent received local signal (intermittent wave) 12. This is output to LPF4.

増幅器制御回路３は、増幅器制御信号13を増幅器２に
出力する。The amplifier control circuit 3 outputs the amplifier control signal 13 to the amplifier 2.

LPF4の出力である受信ローカル信号（断続波）16は、
受信回路６のミキサー５のローカル信号として入力さ
れ、受信入力14をIF信号15に変換する。The received local signal (intermittent wave) 16, which is the output of LPF4,
It is inputted as a local signal of the mixer 5 of the receiving circuit 6, and the receiving input 14 is converted into an IF signal 15.

次に本実施例の具体的動作を説明する。周波数シンセ
サイザ１の出力する受信ローカル信号（連続波）11は、
増幅器２によって増幅されるが、増幅器２の増幅動作
は、増幅器制御回路３の出力である増幅器制御信号13に
より制御される。Next, the specific operation of this embodiment will be described. The received local signal (continuous wave) 11 output from the frequency synthesizer 1 is
Although amplified by the amplifier 2, the amplification operation of the amplifier 2 is controlled by the amplifier control signal 13 which is the output of the amplifier control circuit 3.

増幅器制御回路３は、TACAN・DME装置が距離質問パル
スを送信しない時は増幅器２が受信ローカル信号（連続
波）11を増幅するように制御するが、距離質問パルスを
送信する時は、増幅器２が受信ローカル信号（連続波）
11を増幅しないように制御する。The amplifier control circuit 3 controls the amplifier 2 so as to amplify the received local signal (continuous wave) 11 when the TACAN / DME device does not transmit the distance interrogation pulse, but when the distance interrogation pulse is transmitted, the amplifier 2 Received local signal (continuous wave)
Control so that 11 is not amplified.

この結果、増幅器２の出力である受信ローカル信号
（断続波）12は、距離質問パルス送信時のみ無信号の断
続波となる。As a result, the received local signal (intermittent wave) 12 which is the output of the amplifier 2 becomes a non-intermittent wave only when the distance inquiry pulse is transmitted.

受信ローカル信号（断続波）12は、LPF4に入力され、
その高調波成分を除かれた受信ローカル信号（断続波）
16となりミキサー５に入力される。The received local signal (intermittent wave) 12 is input to LPF4,
Received local signal (intermittent wave) with its harmonic components removed
It becomes 16 and is input to the mixer 5.

ミキサー５は、受信ローカル信号（断続波）16が存在
する場合は、受信入力14をIF信号15に変換するが、受信
ローカル信号（断続波）16が無信号の場合は、受信入力
14をIF信号15に変換しないため、IF信号15は無信号とな
る。The mixer 5 converts the reception input 14 into the IF signal 15 when the reception local signal (intermittent wave) 16 exists, but when the reception local signal (intermittent wave) 16 is no signal, the reception input 14
Since 14 is not converted to the IF signal 15, the IF signal 15 is a non-signal.

このため、距離質問送信パルスの受信入力14への漏れ
込みは、パルス送信時において受信ローカル信号（断続
波）16が無信号となるため、ミキサー５によってIF信号
15に変換されず、受信回路６の動作を不安定にすること
はない。Therefore, the distance interrogation transmission pulse leaks into the reception input 14, because the reception local signal (intermittent wave) 16 becomes no signal at the time of pulse transmission, and the mixer 5 outputs the IF signal.
It is not converted into 15 and does not make the operation of the receiving circuit 6 unstable.

なお、TACAN・DME装置の距離質問パルスの送信デュー
ティサイクルは１％以下と非常に小さいため、通常の受
信動作が受信ローカル信号（断続波）16により影響を受
けることは無視できる。Since the transmission duty cycle of the distance inquiry pulse of the TACAN / DME device is as small as 1% or less, it can be ignored that the normal reception operation is affected by the reception local signal (intermittent wave) 16.

〔考案の効果〕[Effect of device]

以上説明したように本考案は、周波数シンセサイザの
発生した受信ローカル信号を、距離質問パルス送信時の
み出力しないようにすることにより、送信パルスの受信
入力への漏れ込みを受信回路のミキサーにてIFに変換す
ることを抑止し、過大入力による受信回路動作の不安定
化を大幅に抑圧できるという効果がある。As described above, the present invention prevents the reception local signal generated by the frequency synthesizer from being output only during the transmission of the distance inquiry pulse, so that the leakage of the transmission pulse into the reception input can be detected by the IF of the mixer of the reception circuit. There is an effect that it is possible to suppress the conversion of the input signal into the input signal and to significantly suppress the instability of the operation of the receiving circuit due to the excessive input.

【図面の簡単な説明】[Brief description of drawings]

第１図は本考案のTACAN・DME用受信ローカル回路の一実
施例のブロック図、第２図は従来のTACAN・DME用受信ロ
ーカル回路の一実施例のブロック図である。 １……周波数シンセサイザ、２……増幅器、３……増幅
器制御回路、４……L,P,F、５……ミキサー、６……受
信回路。FIG. 1 is a block diagram of an embodiment of a TACAN / DME receiving local circuit of the present invention, and FIG. 2 is a block diagram of an embodiment of a conventional TACAN / DME receiving local circuit. 1 ... Frequency synthesizer, 2 ... Amplifier, 3 ... Amplifier control circuit, 4 ... L, P, F, 5 ... Mixer, 6 ... Receiving circuit.

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of utility model registration request] 【請求項１】航空機搭載用TACAN・DME装置において、周
波数シンセサイザと、この周波数シンセサイザの発生し
た連続波である受信ローカル信号を増幅する増幅器と、
この増幅器をTACAN・DME装置が距離質問パルスを送信す
る時のみ増幅しないように制御する増幅器制御回路と、
前記増幅器の出力をフィルタリングするローパスフィル
タとを備えて成ることを特徴とするTACAN・DME用受信ロ
ーカル回路。1. A TACAN / DME device mounted on an aircraft, comprising: a frequency synthesizer; and an amplifier for amplifying a received local signal that is a continuous wave generated by the frequency synthesizer.
An amplifier control circuit that controls this amplifier so that it does not amplify only when the TACAN / DME device transmits a distance inquiry pulse,
A reception local circuit for TACAN / DME, comprising a low-pass filter for filtering the output of the amplifier.
JP7809589U 1989-06-30 1989-06-30 Reception local circuit for TACAN / DME Expired - Lifetime JP2501675Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7809589U JP2501675Y2 (en) 1989-06-30 1989-06-30 Reception local circuit for TACAN / DME

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7809589U JP2501675Y2 (en) 1989-06-30 1989-06-30 Reception local circuit for TACAN / DME

Publications (2)

Publication Number Publication Date
JPH0317585U JPH0317585U (en) 1991-02-21
JP2501675Y2 true JP2501675Y2 (en) 1996-06-19

Family

ID=31621069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7809589U Expired - Lifetime JP2501675Y2 (en) 1989-06-30 1989-06-30 Reception local circuit for TACAN / DME

Country Status (1)

Country Link
JP (1) JP2501675Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5963573B2 (en) * 2012-06-29 2016-08-03 古野電気株式会社 Radar equipment

Also Published As

Publication number Publication date
JPH0317585U (en) 1991-02-21

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