JP3836303B2 - Signal analysis apparatus and marker display method - Google Patents

Description

【００４７】
表示制御手段９ｄは、カレントマーカ設定手段８ａからのカレントマーカの周波数データ、ピークリスト作成手段９ｃによって作成されたピークリストに基づき、カレントマーカのＸ座標相当の位置を中心に左右複数個のマルチマーカ１２を表示手段７の管面７ａ上に設定して表示制御している。
【００４８】
本例では、カレントマーカ１１のＸ座標相当の位置を中心に左右最大５ポイントずつの有効ピークと判別されたピークがマルチマーカ１２として設定され、その表示制御が行われる。表示制御手段９ｄは、マルチマーカ１２の設定表示制御を行うにあたって、マーカ値をまとめて読み出せるように、カレントマーカ１１を中心として、カレントマーカ１１の左側にあるピークはカレントマーカ１１に近い順にマーカナンバー５、４、３、２、１と設定して表示制御している。これに対し、カレントマーカ１１の右側にあるピークはカレントマーカ１１に近い順にマーカナンバー６、７、８、９、１０と設定して表示制御している。表１のピークリストに基づく図３及び図４の表示例では、信号ＸのＸ座標の位置にカレントマーカ１１が配置され、信号Ａのマルチマーカ１２ａがマーカナンバー５に設定され、信号Ｂのマルチマーカ１２ｂがマーカナンバー４に設定され、信号Ｃのマルチマーカ１２ｃがマーカナンバー６に設定される。なお、表示制御手段９ｄは、有効ピーク判別手段９ｂが有効ピークなしと判別したときには、マルチマーカ１２の設定表示を行わない。
【００４９】
また、表示制御手段９ｄは、マルチマーカリストを波形とともに表示する旨の設定がコマンド入力設定手段８ｆから特に入力されなければ、図３に示すように、表示手段７の管面７ａに設定されたマルチマーカ１２のみを波形とともに表示制御している。
【００５０】
これに対し、マルチマーカリストを波形とともに表示する旨の設定がコマンド入力設定手段８ｆから入力されると、図４に示すように、マルチマーカ１２に加え、各マルチマーカ１２のピーク周波数とレベルをマルチマーカリストとして表示手段７の管面７ａに波形とともに表示制御している。
【００５１】
ピーク点読出制御手段９ｅは、コマンド入力設定手段８ｆからマルチマーカ１２のピーク点の個数を読み出すためのコマンドが入力設定されたときに、ピークリスト作成手段９ｂで作成されたピークリストに基づいて、カレントマーカ１１を中心とする左右のピーク点の個数を読み出している。この結果は表示制御手段９ｄの制御により表示手段７に表示される。このピーク点の個数を読み出す際のコマンドとしては、左右のピーク個数をレスポンスデータとして一度に出力するクエリコマンドが用いられる。なお、レスポンスデータは、左側の数、右側の数としてマルチマーカ１２のピーク点を読むことができる。
【００５２】
データ出力制御手段９ｆは、コマンド入力設定手段８ｆからマルチマーカ１２のマーカ値を同時に読み出すためのコマンドが入力設定されたときに、ピークリスト作成手段９ｂで作成されたピークリストに基づいて、マルチマーカ１２のマーカナンバー順（例えば１０個であれば、１〜１０の順）にオンになっているマーカナンバーの周波数、時間データ、レベルデータを出力制御している。
【００５３】
次に、上記のように構成される信号分析装置１によって実行される「ピークホールド機能」について説明する。
【００５４】
本例における「ピークホールド機能」は、次の手順でマルチマーカ１２を設定表示する機能である。
（１）表示手段７の管面７ａ内のすべての信号からピークを検出し、さらに検出したピーク信号のうち設定条件（予め設定されたサーチしきい値、サーチ分解能）に合う有効ピークを抽出し、抽出した有効ピークの順に各有効ピークの表示手段７のＸ座標（横軸）、周波数、レベルを持つピークリストを作成する。
（２）カレントマーカ設定手段８ａのカレントマーカ１１の設定情報と、作成されたピークリストからカレントマーカ１１のＸ座標相当の位置を求める。この処理は、カレントマーカ１１がピークとは限らないため実行される。
（３）カレントマーカ１１のＸ座標相当の位置を中心に左右複数ポイント（例えば５ポイント）ずつの有効ピークをマルチマーカ１２として設定して表示する。マルチマーカ１２のマーカ値をまとめて読み出せるように、カレントマーカ１１の左側にあるピークは、カレントマーカ１１に近い順にマーカナンバーを５、４、３、２、１と設定してマルチマーカ１２を表示し、カレントマーカ１１の右側にあるピークは、近い順にマーカナンバーを６、７、８、９、１０と設定してマルチマーカを表示する。なお、有効ピークがない場合には、マルチマーカ１２の設定表示は行わない。
（４）マルチマーカリストの表示が有効に設定されているときは、マルチマーカ１２に位置する信号のピークの周波数とレベルがマーカリストとして一覧表示する。なお、表示速度が遅くなるため、自動測定ではマーカリストなしとして実行した方が好ましい。
【００５５】
次に、信号処理手段９によって実行される「ピークホールド機能」の動作として、サーチしきい値が有効でサーチしきい値範囲がＡｂｏｖｅ（サーチしきい値以上）に設定されている場合を説明する。以下のマルチマーカ１２の設定表示によれば、所望レベル以上のピーク信号のみを抽出して観測する場合に有効である。
【００５６】
ここでは、図３に示すような波形を取り込み、信号ＸのＸ座標相当の位置にカレントマーカ１１が設定されている状態でマルチマーカ１２を設定表示する場合を例にとって説明する。
【００５７】
まず、ピーク検出手段９ａは、記憶手段６に格納されたデータに基づく表示手段７の管面７ａ上の波形を左から右にサーチし、その波形の傾きがマイナスからプラスに変化した後、マイナスに変化した極大点をピークとして検出する。
【００５８】
次に、有効ピーク判別手段９ｂは、ピーク検出手段９ａによって検出されたピーク信号のうち、サーチしきい値よりも上にあるピーク信号を有効ピークとして判別する。図３の波形の例では、信号Ａ，Ｂ，Ｘ，Ｃが有効ピークとして判別される。
【００５９】
次に、ピークリスト作成手段９ｃは、有効ピーク判別手段９ｂにより有効ピークと判別されたピーク信号に基づいてピークリストを作成する。図３の波形の例では、表１に示すように、有効ピークと判別された順に各ピーク信号Ａ，Ｂ，Ｘ，ＣのＸ座標、周波数、レベルが一覧表形式でピークリストが作成される。
【００６０】
そして、表示制御手段９ｄは、カレントマーカ設定手段８ａからのカレントマーカ１１の周波数データ、ピークリスト作成手段９ｃによって作成されたピークリストに基づき、カレントマーカ１１のＸ座標相当の位置を中心に左右複数個のマルチマーカ１２を表示手段７の管面７ａ上に設定して表示制御する。その際、マーカナンバーとともにマルチマーカ１２の表示を行うこともできる。
【００６１】
図３の波形の例では、本例では、３番目に有効ピークと判別されたピーク信号ＸのＸ座標相当の位置にカレントマーカ１１が表示され、このカレントマーカ１１１のＸ座標相当の位置を中心として、１番目と２番目に有効ピークと判別されたピーク信号Ａ，ＢのＸ座標相当の位置にマルチマーカ１２ａ，１２ｂが設定表示される。また、カレントマーカ１１のＸ座標相当の位置を中心として、４番目に有効ピークと判別されたピーク信号ＣのＸ座標相当の位置にマルチマーカ１２ｃが設定表示される。
【００６２】
なお、上記「ピークホールド機能」において、サーチしきい値が有効でサーチしきい値範囲がＢｅｌｏｗ（サーチしきい値以下）に設定されている場合、有効ピーク判別手段９ｂは、ピーク検出手段９ａによって検出されたピーク信号のうち、サーチしきい値よりも下にあるピーク信号を有効ピークとして判別する。それ以降の動作については、上述したサーチしきい値が有効でサーチしきい値範囲がＢｅｌｏｗに設定されている場合と同様の処理が実行される。このマルチマーカ１２の設定表示によれば、観測信号の影響により発生する信号の観測、雑音レベルの信号の測定、微弱な妨害波などを測定する場合に有効である。
【００６３】
また、しきい値設定手段８ｂ及びしきい値範囲設定手段８ｃによる設定を無効、すなわちサーチしきい値を無効とした場合には、ピーク分解能設定手段８ｅの設定によるサーチ分解能のみが有効となる。そして、有効ピーク判別手段９ｂは、ピーク検出手段９ａで検出されたピーク信号のうち、サーチ分解能を以上のピーク信号のみ有効ピークと判別する。それ以降の動作については、上述したサーチしきい値を有効とした場合と同様の処理が実行される。
【００６４】
次に、本例の信号分析装置１による「ピーク点読出機能（ピークカウント機能）」について説明する。
【００６５】
「ピーク点読出機能」は、予め決められたコマンド（左右のピーク個数をレスポンスデータとして一度に出力するクエリコマンド）がコマンド入力設定手段８ｆから入力されると、ピーク点読出制御手段９ｅがピークリスト作成手段９ｃで作成されたピークリストに基づいてカレントマーカ１１を中心とする左右のピーク点の個数を読み出して出力する。このピーク点読出制御手段９ｅから出力される情報は、表示制御手段９ｄの制御により表示手段７に表示したり、外部の端末装置に出力される。
【００６６】
ところで、本例の信号分析装置１では、上述した「ピークホールド機能」、「ピークカウント機能」の他に、「マーカ値同時読出機能」を備えている。
【００６７】
「マーカ値同時読出機能」では、予め決められたコマンドがコマンド入力設定手段８ｆから入力されると、マルチマーカ１２のマーカナンバー順（例えばマルチマーカ１２の個数が１０個であれば、１〜１０の順）にオンになっているマルチマーカ１２の周波数、時間データ、レベルデータを同時に読み出し、例えばパーソナルコンピュータ等の外部の装置に出力される。
【００６８】
このように、本例の信号分析装置１では、表示手段７の管面７ａ内の波形をサーチしてピーク検出を行い、ピーク検出されたピーク信号のうち設定条件に合う有効ピークのピーク信号を抽出し、この抽出された有効ピークのピーク信号のピークリストを作成し、この作成されたピークリストに基づいてカレントマーカ１１のＸ座標相当の位置を中心に左右複数ポイントの有効ピークをマルチマーカ１２として設定して表示する「ピークホールド機能」を採用している。これにより、ユーザが指定する所望の位置にマルチマーカ１２を設定表示することができる。また、作成されたピークリストからマルチマーカ１２が位置するデータの読み出しを高速に読み出すことができる。
【００６９】
また、本例の信号分析装置１では、「ピークホールド機能」で作成されるピークリストからピークの数を読み出して通知する「ピーク点読出機能」を採用している。これにより、ユーザによる無駄な実行を省略することができる。具体的には、「ピーク点読出機能」を使用し、カレントマーカ１１を中心とする左右のピーク点の個数を表示手段７に表示すれば、ユーザはその表示を見て、例えば更に右側のピークの信号を観測したい場合には、カレントマーカ１１を右側に再設定し、上述した「ピークホールド機能」を実行すれば観測したい信号のピークを知ることができる。
【００７０】
さらに、本例の信号分析装置１では、マルチマーカ１２のマーカナンバー順にオンになっているマルチマーカ１２のデータ（周波数、時間、レベルの各データ）を同時に読み出して出力する「マーカ値同時読出機能」を採用している。これにより、表示手段７の管面７ａ上に設定表示された全てのマルチマーカ１２に関するデータを外部に出力することができる。
【００７１】
【発明の効果】
以上の説明で明らかなように、本発明によれば、表示手段の管面内の波形をサーチしてピーク検出を行い、ピーク検出されたピーク信号のうち設定条件に合う有効ピークのピーク信号を抽出し、この抽出された有効ピークのピーク信号のピークリストを作成し、この作成されたピークリストに基づいてカレントマーカのＸ座標相当の位置を中心に左右複数ポイントの有効ピークをマルチマーカとして設定して表示するので、ユーザが指定する所望の位置にマルチマーカを設定表示することができる。また、作成されたピークリストからマルチマーカが位置するデータの読み出しを高速に読み出すことができる。
【００７２】
ピークリストからピークの数を読み出して通知するので、ユーザによる無駄な実行を省略することができる。例えばカレントマーカを中心とする左右のピーク点の個数を表示手段に表示すれば、ユーザはその表示を見て、例えば更に右側のピークの信号を観測したい場合には、カレントマーカを右側に再設定すれば、観測したい信号のピークを知ることができる。
【００７３】
マルチマーカのマーカナンバー順にオンになっているマルチマーカのデータ（周波数、時間、レベルの各データ）を同時に読み出して出力するので、表示手段の管面上に設定表示された全てのマルチマーカに関するデータを外部に出力することができる。
【図面の簡単な説明】
【図１】 本発明による信号分析装置の機能ブロック図
【図２】 本発明による信号分析装置のピークホールド機能を説明するための図
【図３】 本発明による信号分析装置でピークホールド機能を実行したときのマーカリストなしの表示状態の一例を示す図
【図４】 本発明による信号分析装置でピークホールド機能を実行したときのマーカリスト付きの表示状態の一例を示す図
【図５】 従来のマーカ表示において信号の値を読み出す方法を説明するための波形の一例を示す図
【図６】 マルチマーカの表示例を示す図
【符号の説明】
１…信号分析装置、２…周波数変換部、２ａ…局部発振器、３…掃引制御部、４…検波器、５…Ａ／Ｄ変換器、６…記憶手段、７…表示手段、７ａ…管面、８…設定手段、９…信号処理手段、１１…カレントマーカ、１２（１２ａ〜１２ｃ）…マルチマーカ。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a signal analyzer that sweeps and measures a signal employed in a mobile communication system such as a mobile phone as a signal to be measured, and displays a waveform of the spectrum measurement result. The present invention relates to a signal analysis apparatus and a marker display method that can read and set the value of a signal where the marker is positioned.
[0002]
[Prior art]
A spectrum analyzer is known as a signal analyzer that displays and analyzes a signal for each frequency component. In the spectrum analyzer, the signal value desired by the user is read using a marker function and a search function as described below. In general, there are a plurality of signals to be read out for one measurement, and various search functions have been conventionally provided.
[0003]
As a conventional search function, a search function using a “Next peak search” search function is known. A procedure for acquiring a waveform as shown in FIG. 5 by measurement using a spectrum analyzer and reading a signal value using the search function “Next peak search” will be described.
[0004]
As a condition in FIG. 5, it is assumed that the band centered on the signal X is a measurement target, and the “threshold value” indicating the lower limit value of the effective signal level is set at the position of the alternate long and short dash line.
[0005]
When reading a signal value by taking a waveform as shown in FIG. 5, (1) the left and right signal values are sequentially read starting from the signal X. (2) The marker 22 is moved to the position of the signal X. (3) The signal A is detected using the search function “Next Left search”. (4) The marker value of the signal X is read and the read marker value is recorded. (5) The signal B is detected using the search function “Next Left search”. (6) The marker value of signal B is read and the read marker value is recorded. (7) Execute the search function “Next Left search” and recognize that there is no signal because the result is an error. (8) The marker 22 is moved to the position of the signal X. (9) The signal C is detected using the search function “Next Right search”. (10) The marker value of signal C is read, and the read marker value is recorded. (11) The search function “Next Right search” is executed, and since the result is an error, it is recognized that there is no signal. Thus, reading of the signal value for the waveform shown in FIG. 5 is completed.
[0006]
[Problems to be solved by the invention]
However, in the conventional method, when the marker value is read from the waveform of FIG. 5, the search function is executed five times and the value of the searched signal is read three times, and 11 procedures are required as a whole. That is, when a plurality of signals are read out from the tube surface by the conventional method described above, there is a problem that a plurality of searches and readings are required, which takes time. In addition, since the search completion is confirmed only by an error, there has been a problem that it has to be executed once more on the left and right.
[0007]
Further, a conventional spectrum analyzer having a function using a multi-marker is known. As shown in FIG. 6, the function using the multi-marker places a predetermined number (for example, 10) of markers 23 in the waveform displayed on the tube surface 21 of the display unit, and the marker 23 indicates. This is a function that allows the signal level to be read by a list display 24 or a remote command.
[0008]
By the way, as a search function of the multi-marker 23 described above, conventionally, “Highest 10” for setting a marker in order of the level with respect to the signal in the tube surface 21 and a marker for every N times the frequency of the current marker are set. Two functions of “Harmonics” are known.
[0009]
However, in “Highest 10”, since the position of the marker to be arranged is determined by the level, it cannot be associated with the current marker. As a result, there is a risk of setting a plurality of markers on a signal lower than the observation frequency. In “Harmonics”, since a marker is set for each predetermined frequency, it cannot be associated with a level. As a result, there is a possibility that the marker cannot be set to a signal of a desired level.
[0010]
Accordingly, the present invention has been made in view of the above problems, and is a signal that can set and display a multimarker at a desired position designated by a user and can read data at which the multimarker is located at high speed. An object of the present invention is to provide an analyzer and a marker display method.
[0011]
[Means for Solving the Problems]
  In order to achieve the above object, the invention of claim 1 has a local oscillator 2a capable of sweeping the frequency, and mixes the oscillation signal of the local oscillator and the signal under measurement to convert the signal under measurement into an intermediate frequency signal. Frequency converter 2, detector 4 that receives and detects the intermediate frequency signal, A / D converter 5 that converts the output of the detector into digital data, and conversion by the A / D converter Based on the storage means 6 for storing the obtained digital data, the sweep control section 3 for sending a sweep signal for sweeping the output frequency of the local oscillator at a predetermined sweep time, and the digital data stored in the storage means Display means 7 for displaying the spectrum waveform of the signal under measurement on coordinates with the horizontal axis as the frequency axis;The peak detection means 9a for detecting the peak of the waveform displayed on the display means, and the effective peak for extracting the peak signal of the effective peak that meets the setting condition set by the setting means from the peak signal detected by the peak A discriminating means 9b, and a peak list creating means 9c for creating a peak list of effective peaks extracted by the effective peak discriminating means;WithSaidIn a signal analyzer for setting and displaying a marker at a predetermined position corresponding to the X coordinate in the tube surface of the display means and reading the signal value of the marker,
  Setting means 8 for setting setting conditions for displaying a current marker 11 whose position can be changed in the spectrum waveform displayed on the display means and a multi-marker 12 for indicating a peak point;
  in frontWritingMultiple points on the left and right of the current marker on the frequency axis based on the created peak listOne by oneAt the position of the effective peakIn order of proximity to the current markerControl multi-marker displayDisplay controlMean 9dIt is characterized by comprising.
[0012]
  The invention of claim 2 is the signal processing apparatus of claim 1,
  SaidThe display control means 9d displays a list of the peak frequencies and levels of the multimarkers on the display means 7 together with the spectrum waveform.It is characterized by that.
[0013]
  The invention of claim 3A frequency converter 2 having a local oscillator 2a capable of sweeping the frequency, mixing the oscillation signal of the local oscillator and the signal under measurement, and converting the signal under measurement into an intermediate frequency signal; and receiving and detecting the intermediate frequency signal And output detector 4, A / D converter 5 for converting the output of the detector into digital data, storage means 6 for storing the digital data converted by the A / D converter, and the local section A sweep controller 3 for sending a sweep signal for sweeping the output frequency of the oscillator at a predetermined sweep time, and a display means 7 for displaying the spectrum waveform of the signal under measurement based on the digital data stored in the storage means. And a peak detection means 9a for detecting the peak of the waveform displayed on the display means, and an effective peak of the peak detected peak signal that matches the setting condition set by the setting means. Effective peak discriminating means 9b for extracting the peak signal, and peak list creating means 9c for creating the peak list of the effective peaks extracted by the effective peak discriminating means, corresponding to the X coordinate in the tube surface of the display means In the marker display method of the signal analyzer for setting and displaying the marker at a predetermined position and reading out the signal value of the marker,
  Setting conditions for displaying a current marker 11 whose position can be changed in the spectrum waveform displayed on the display means and a multi-marker 12 for indicating a peak point are set, and based on the created peak list The multi-marker display control is performed in order of the current marker at the position of the effective peak at each of multiple left and right points centering on the position of the current marker on the frequency axis.It is characterized by doing.
[0014]
  The invention of claim 4 is claimed in claimIn the marker display method of 3,
  SaidA list of peak frequencies and levels of each multimarker is displayed on the display means 7 together with the spectrum waveform.It is characterized by that.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a functional block diagram showing an embodiment of a signal analyzer according to the present invention, FIG. 2 is a diagram for explaining a peak hold function of the signal analyzer, and FIG. 3 executes a peak hold function in the signal analyzer. FIG. 4 is a diagram showing an example of a display state with a marker list when the peak hold function is executed by the signal analyzer.
[0023]
The signal analysis apparatus 1 of this example sweeps and measures a signal employed in a mobile communication system such as a mobile phone as a signal to be measured, and displays the spectrum measurement result as a waveform. As shown in FIG. , A frequency converter 2, a sweep controller 3, a detector 4, an A / D converter 5, a storage means (waveform memory) 6, a display means (display) 7, a setting means 8, and a signal processing means 9 Is done.
[0024]
The frequency conversion unit 2 includes a local oscillator 2a, a signal mixer 2b, and a band limiting filter (IF filter) 2c.
[0025]
In the local oscillator 2a, the oscillation frequency is swept (frequency sweep) over a predetermined frequency range by the sweep signal from the sweep control unit 3 in the state of the frequency domain. On the other hand, in the time domain state, the sweep signal from the sweep control unit 4 is not sent to the local oscillator 2a, and the local oscillator 2a is set to a fixed oscillation frequency.
[0026]
The signal mixer 2b mixes the signal under measurement from the outside and the oscillation frequency from the local oscillator 2a, converts it to an intermediate frequency signal (IF signal), and inputs it to the IF filter 2c.
[0027]
The IF filter 2c is a band-pass filter, and allows the IF signal from the signal mixer 2b to pass through with a predetermined frequency width.
[0028]
The sweep control unit 3 outputs a sweep signal (voltage signal) for sweeping the output frequency of the local oscillator 2a for a predetermined sweep time. More specifically, the sweep control unit 3 inputs a sweep signal to the local oscillator 2a so as to sweep the oscillation frequency of the local oscillator 2a over a predetermined frequency range in the frequency domain state, and varies the oscillation frequency of the local oscillator 2a. ing. On the other hand, in the time domain state, the oscillation frequency of the local oscillator 2a is set so that the oscillation frequency of the local oscillator 2a is fixed.
[0029]
The detector 4 receives and detects the intermediate frequency signal that has passed through the IF filter 2 c, and outputs the detected signal to the A / D converter 5.
[0030]
The A / D converter 5 converts the signal detected by the detector 4 into digital data.
[0031]
The storage means 6 as a waveform memory stores and stores digital data (waveform data) converted by the A / D converter 5.
[0032]
Digital data (power value) stored in the storage unit 6 is input to the display unit 7 as a vertical axis signal, and a sweep signal of the sweep control unit 3 is input as a horizontal axis signal. The display means 7 displays a waveform with the horizontal axis (X coordinate) on the tube surface 7a as a frequency scale and the vertical axis (Y coordinate) as the magnitude (intensity) of each frequency component included in the signal under measurement. . In the time domain state, the display means 7 displays a waveform with the horizontal axis on the tube surface 7a as a time scale and the vertical axis as the magnitude of the frequency component contained in the signal under measurement.
[0033]
The setting unit 8 performs various settings by user command input and key operations. The current marker setting unit 8a, threshold setting unit 8b, threshold range setting unit 8c, threshold on / off setting. A means 8d, a peak resolution setting means 8e, and a command input setting means 8f are provided.
[0034]
The current marker setting means 8a is position information of the current marker 11 when the current marker 11 is arranged in the waveform displayed on the tube surface 7a of the display means 7 (for example, X coordinate information on the horizontal axis in FIGS. 3 and 4). Is set. The position information of the current marker 11 is input to a peak list creation unit 9c and a display control unit 9d described later. Normally, the current marker 11 is set to the center frequency of the observation frequency by the user setting, but can be set to a predetermined position within the search frequency range of the signal under measurement.
[0035]
The threshold value setting means 8b sets a search threshold value according to the level of the signal under measurement to be observed as comparison data for determining effective peaks by the effective peak determining means 9b described later.
[0036]
The threshold range setting means 8c sets a search threshold range set by the threshold setting means 8b. In this example, the range above the search threshold is defined as “Above”, and the range below the search threshold is defined as “Below”.
[0037]
The threshold value on / off setting unit 8d sets whether the settings of the threshold value setting unit 8b and the threshold range setting unit 8c are valid or invalid. In this example, when the search threshold value is set to ON, the settings of the threshold value setting means 8b and the threshold value range setting means 8c become valid, and these setting information is input to the effective peak determination means 9b described later. The On the other hand, when the search threshold is turned off, the settings of the threshold setting means 8b and the threshold range setting means 8c are invalid, and these setting information is input to the effective peak discriminating means 9b described later. Not to be.
[0038]
The peak resolution setting means 8e sets a value for comparison with the difference between the maximum point and the minimum point when the waveform is searched by the peak detection means 9a described later as the peak resolution. Information on the set peak resolution is input to the effective peak discriminating means 9b described later.
[0039]
The command input setting means 8f forms a waveform on the tube surface 7a of the display means 7 with the peak frequency and level of each multimarker 12 set and displayed based on the peak list created by the peak list creation means 9c described later as a multimarker list. Whether or not to be displayed together is set by a predetermined command input. Setting information by this command input is input to the display control means 9d described later.
[0040]
In addition, a predetermined command is input from the command input setting unit 8f when a “peak count function” or “marker value simultaneous reading function” described later is executed.
[0041]
The signal processing means 9 comprises a microprocessor such as a CPU, for example, and includes a peak detection means 9a, an effective peak determination means 9b, a peak list creation means 9c, a display control means 9d, a peak point read control means 9e, and a data output control means 9f. It is prepared for.
[0042]
The peak detection means 9 a detects peaks from all signals displayed on the tube surface 7 a of the display means 7 based on the data stored in the storage means 6. To explain further, the peak detection means 9a searches the waveform on the tube surface 7a of the display means 7 from the left to the right based on the data stored in the storage means 6, and the inclination of the waveform changes from minus to plus. Thereafter, the maximum point changed to minus is detected as a peak (see FIG. 2). Therefore, the maximum number of peaks by this peak detection is half of the number of measurement points. For example, if the number of measurement points is 501 points, there are 250 peaks at the maximum. The peak signal detected by the peak detection means 9a is input to the effective peak determination means 9b.
[0043]
The effective peak discriminating means 9b discriminates only the peak signal that meets the setting condition set by the setting means 8 among the peak signals detected by the peak detecting means 9a as the effective peak. More specifically, the effective peak discriminating means 9b is a peak in which the difference between the minimum point and the maximum point is set by the peak resolution setting means 8e when the settings of the threshold setting means 8b and the threshold range setting means 8c are invalid. A peak signal with resolution or higher is identified as an effective peak.
[0044]
On the other hand, the effective peak discriminating means 9b is higher than the search threshold when the threshold setting means 8b and the threshold range setting means 8c are effective and the search threshold range is “Above”. A peak signal at (high level) is determined as an effective peak. The effective peak discriminating means 9b is lower (lower) than the search threshold when the settings of the threshold setting means 8b and the threshold range setting means 8c are valid and the search threshold range is “Bellow”. Level) is determined as an effective peak.
[0045]
The peak list creating unit 9c creates a peak list based on the peak signal determined to be an effective peak by the effective peak determining unit 9b. Table 1 below shows an example of a peak list created by the peak list creating means 9c. As shown in Table 1, as a peak list, the X coordinate of the peak signal (corresponding to the horizontal axis of the tube surface 7a of the display means 7), frequency, and level are listed in the order in which they are determined as effective peaks. Created with.
[0046]
[Table 1]

[0047]
The display control means 9d has a plurality of left and right multi-markers centered on the position corresponding to the X coordinate of the current marker based on the frequency data of the current marker from the current marker setting means 8a and the peak list created by the peak list creation means 9c. 12 is set on the tube surface 7a of the display means 7 for display control.
[0048]
In this example, a peak determined to be an effective peak of 5 points at the left and right at the maximum around the position corresponding to the X coordinate of the current marker 11 is set as the multimarker 12 and its display control is performed. When the display control unit 9d performs setting display control of the multi-marker 12, the peak on the left side of the current marker 11 with the current marker 11 at the center is the marker closest to the current marker 11 so that the marker values can be read collectively. Display control is performed by setting numbers 5, 4, 3, 2, and 1. On the other hand, the peak on the right side of the current marker 11 is displayed and controlled by setting the marker numbers 6, 7, 8, 9, and 10 in order of increasing proximity to the current marker 11. 3 and 4 based on the peak list of Table 1, the current marker 11 is arranged at the X coordinate position of the signal X, the multi-marker 12a of the signal A is set to the marker number 5, and the multi-signal of the signal B is set. The marker 12b is set to the marker number 4, and the multi-marker 12c of the signal C is set to the marker number 6. The display control unit 9d does not display the setting of the multimarker 12 when the effective peak determination unit 9b determines that there is no effective peak.
[0049]
Further, the display control means 9d is set on the tube surface 7a of the display means 7 as shown in FIG. 3 unless the setting for displaying the multi-marker list together with the waveform is input from the command input setting means 8f. Only the multi-marker 12 is controlled to be displayed together with the waveform.
[0050]
On the other hand, when the setting for displaying the multimarker list together with the waveform is input from the command input setting means 8f, the peak frequency and level of each multimarker 12 are set in addition to the multimarker 12, as shown in FIG. The multi-marker list is controlled to be displayed together with the waveform on the tube surface 7a of the display means 7.
[0051]
Based on the peak list created by the peak list creating means 9b when the command for reading the number of peak points of the multimarker 12 is input and set from the command input setting means 8f, the peak point reading control means 9e The number of left and right peak points centered on the current marker 11 is read. This result is displayed on the display means 7 under the control of the display control means 9d. As a command for reading the number of peak points, a query command that outputs the left and right peak numbers as response data at a time is used. Note that the response data can read the peak points of the multimarker 12 as the number on the left side and the number on the right side.
[0052]
The data output control means 9f receives the multi-marker based on the peak list created by the peak list creating means 9b when a command for simultaneously reading the marker values of the multi-marker 12 is set from the command input setting means 8f. The frequency, time data, and level data of the marker numbers that are turned on in the order of 12 marker numbers (for example, 1 to 10 in the case of 10) are controlled to be output.
[0053]
Next, the “peak hold function” executed by the signal analyzing apparatus 1 configured as described above will be described.
[0054]
The “peak hold function” in this example is a function for setting and displaying the multimarker 12 in the following procedure.
(1) Peaks are detected from all signals within the tube surface 7a of the display means 7, and effective peaks that meet the set conditions (preset search threshold and search resolution) are extracted from the detected peak signals. A peak list having the X coordinate (horizontal axis), frequency, and level of each effective peak display means 7 is created in the order of the extracted effective peaks.
(2) The position corresponding to the X coordinate of the current marker 11 is obtained from the setting information of the current marker 11 of the current marker setting means 8a and the created peak list. This process is executed because the current marker 11 is not necessarily a peak.
(3) The effective peak of each of a plurality of left and right points (for example, 5 points) around the position corresponding to the X coordinate of the current marker 11 is set as the multi-marker 12 and displayed. The peak on the left side of the current marker 11 is set to the marker numbers 5, 4, 3, 2, and 1 in order from the current marker 11 so that the marker values of the multi marker 12 can be read collectively. The peak on the right side of the current marker 11 is displayed in a multi-marker with the marker numbers set to 6, 7, 8, 9, and 10 in order from the nearest. When there is no effective peak, the setting display of the multi marker 12 is not performed.
(4) When the display of the multi-marker list is set to be valid, the peak frequency and level of the signal located at the multi-marker 12 are displayed in a list as a marker list. In addition, since display speed becomes slow, it is preferable to execute without automatic marker measurement in the marker list.
[0055]
Next, a case where the search threshold value is valid and the search threshold value range is set to Above (above the search threshold value) will be described as an operation of the “peak hold function” executed by the signal processing means 9. . The following setting display of the multimarker 12 is effective when extracting and observing only a peak signal of a desired level or higher.
[0056]
Here, a case will be described as an example in which a waveform as shown in FIG. 3 is captured and the multimarker 12 is set and displayed in a state where the current marker 11 is set at a position corresponding to the X coordinate of the signal X.
[0057]
First, the peak detection means 9a searches the waveform on the tube surface 7a of the display means 7 based on the data stored in the storage means 6 from the left to the right, and after the slope of the waveform changes from minus to plus, minus The maximum point changed to is detected as a peak.
[0058]
Next, the effective peak discriminating means 9b discriminates a peak signal above the search threshold among the peak signals detected by the peak detecting means 9a as an effective peak. In the waveform example of FIG. 3, the signals A, B, X, and C are determined as effective peaks.
[0059]
Next, the peak list creating unit 9c creates a peak list based on the peak signal determined to be an effective peak by the effective peak determining unit 9b. In the example of the waveform in FIG. 3, as shown in Table 1, a peak list is created in the form of a list in which the X coordinates, frequencies, and levels of the peak signals A, B, X, and C are in the order determined as effective peaks. .
[0060]
Then, the display control means 9d has a plurality of right and left parts centered on the position corresponding to the X coordinate of the current marker 11 based on the frequency data of the current marker 11 from the current marker setting means 8a and the peak list created by the peak list creation means 9c. The multi-markers 12 are set on the tube surface 7a of the display means 7 and display control is performed. At that time, the multi-marker 12 can be displayed together with the marker number.
[0061]
In the example of the waveform in FIG. 3, in this example, the current marker 11 is displayed at the position corresponding to the X coordinate of the peak signal X determined as the third effective peak, and the position corresponding to the X coordinate of the current marker 111 is centered. As a result, the multi-markers 12a and 12b are set and displayed at positions corresponding to the X coordinates of the peak signals A and B determined as the first and second effective peaks. Further, the multi-marker 12c is set and displayed at a position corresponding to the X coordinate of the peak signal C determined as the fourth effective peak with the position corresponding to the X coordinate of the current marker 11 as the center.
[0062]
In the above “peak hold function”, when the search threshold is valid and the search threshold range is set to Bellow (below the search threshold), the effective peak discriminating means 9b is detected by the peak detecting means 9a. Of the detected peak signals, a peak signal below the search threshold is determined as an effective peak. For the subsequent operations, the same processing as that in the case where the above-described search threshold is valid and the search threshold range is set to Bellow is executed. The setting display of the multi-marker 12 is effective when observing a signal generated by the influence of the observation signal, measuring a noise level signal, or measuring a weak interference wave.
[0063]
Further, when the setting by the threshold setting unit 8b and the threshold range setting unit 8c is invalid, that is, when the search threshold is invalidated, only the search resolution by the setting of the peak resolution setting unit 8e is valid. Then, the effective peak discriminating means 9b discriminates that only the peak signals having the search resolution above the peak signal detected by the peak detecting means 9a are effective peaks. For the subsequent operations, the same processing as when the above-described search threshold is enabled is executed.
[0064]
Next, the “peak point reading function (peak count function)” by the signal analyzing apparatus 1 of this example will be described.
[0065]
In the “peak point reading function”, when a predetermined command (a query command that outputs the number of left and right peaks at once as response data) is input from the command input setting means 8f, the peak point reading control means 9e Based on the peak list created by the creation means 9c, the number of left and right peak points centered on the current marker 11 is read and output. The information output from the peak point reading control unit 9e is displayed on the display unit 7 or output to an external terminal device under the control of the display control unit 9d.
[0066]
By the way, the signal analyzing apparatus 1 of this example is provided with a “marker value simultaneous reading function” in addition to the “peak hold function” and the “peak count function” described above.
[0067]
In the “marker value simultaneous reading function”, when a predetermined command is input from the command input setting means 8f, the marker number order of the multi-marker 12 (for example, if the number of multi-markers 12 is 10 is 1 to 10). The frequency, time data, and level data of the multi-markers 12 that are turned on in the order of () are simultaneously read out and output to an external device such as a personal computer.
[0068]
As described above, in the signal analyzing apparatus 1 of this example, the waveform in the tube surface 7a of the display means 7 is searched for peak detection, and the peak signal of the effective peak that matches the setting condition among the peak signals detected by the peak detection is obtained. A peak list of peak signals of the extracted effective peaks is extracted, and effective peaks at a plurality of points on the left and right are centered on the position corresponding to the X coordinate of the current marker 11 based on the generated peak list. “Peak hold function” is set and displayed. Thereby, the multimarker 12 can be set and displayed at a desired position designated by the user. In addition, it is possible to read out the data where the multimarker 12 is positioned from the created peak list at high speed.
[0069]
Further, the signal analyzing apparatus 1 of the present example employs a “peak point reading function” that reads and notifies the number of peaks from the peak list created by the “peak hold function”. Thereby, useless execution by the user can be omitted. Specifically, if the “peak point reading function” is used and the number of left and right peak points centered on the current marker 11 is displayed on the display means 7, the user sees the display and, for example, the right peak point is displayed. If the current marker 11 is reset to the right side and the above-described “peak hold function” is executed, the peak of the signal to be observed can be known.
[0070]
Further, in the signal analyzing apparatus 1 of the present example, the “marker value simultaneous reading function” that simultaneously reads and outputs the data (frequency, time, and level data) of the multimarker 12 that is turned on in the order of the marker number of the multimarker 12. Is adopted. Thereby, the data regarding all the multi-markers 12 set and displayed on the tube surface 7a of the display means 7 can be output to the outside.
[0071]
【The invention's effect】
As is apparent from the above description, according to the present invention, peak detection is performed by searching the waveform in the tube surface of the display means, and the peak signal of the effective peak that matches the set condition is detected among the peak signals detected by the peak detection. Extract and create a peak list of the peak signals of the extracted effective peaks. Based on the generated peak list, set the effective peaks of multiple points on the left and right as multi-markers around the position corresponding to the X coordinate of the current marker. Therefore, the multimarker can be set and displayed at a desired position designated by the user. In addition, it is possible to read out the data where the multi marker is located from the created peak list at high speed.
[0072]
Since the number of peaks is read and notified from the peak list, useless execution by the user can be omitted. For example, if the number of left and right peak points centered on the current marker is displayed on the display means, the user sees the display and resets the current marker to the right side, for example, if he wants to observe the signal on the right side. Then you can know the peak of the signal you want to observe.
[0073]
Multimarker data (frequency, time, and level data) that are turned on in the order of the marker number of the multimarker are simultaneously read out and output, so all the multimarker data set and displayed on the display surface of the display means Can be output to the outside.
[Brief description of the drawings]
FIG. 1 is a functional block diagram of a signal analyzer according to the present invention.
FIG. 2 is a diagram for explaining the peak hold function of the signal analyzer according to the present invention.
FIG. 3 is a marker list when the peak hold function is executed by the signal analyzer according to the present invention.NoneShowing an example of the display state of
FIG. 4 is a marker list when the peak hold function is executed in the signal analyzer according to the present invention.WithShowing an example of the display state of
FIG. 5 is a diagram showing an example of a waveform for explaining a method of reading a signal value in a conventional marker display.
FIG. 6 is a diagram showing a display example of a multi-marker
[Explanation of symbols]
  DESCRIPTION OF SYMBOLS 1 ... Signal analyzer, 2 ... Frequency conversion part, 2a ... Local oscillator, 3 ... Sweep control part, 4 ... Detector, 5 ... A / D converter, 6 ... Memory | storage means, 7 ... Display means, 7a ... Tube surface , 8 ... setting means, 9 ... signal processing means, 11 ... current marker, 12 (12a to 12c) ... multi-marker.

Claims (4)

A frequency converter (2) having a local oscillator (2a) capable of frequency sweeping, mixing an oscillation signal of the local oscillator and a signal under measurement, and converting the signal under measurement into an intermediate frequency signal; and the intermediate frequency signal Receiving and detecting and outputting a detector (4), an A / D converter (5) for converting the output of the detector into digital data, and storing the digital data converted by the A / D converter Based on digital data stored in the storage means, a storage means (6) for transmitting, a sweep control section (3) for sending a sweep signal for sweeping the output frequency of the local oscillator at a predetermined sweep time, and the like. Display means (7) for displaying the spectrum waveform of the measurement signal on coordinates with the horizontal axis as the frequency axis, peak detection means (9a) for detecting the peak of the waveform displayed on the display means, and this peak detection Peak Among them, an effective peak discriminating means (9b) for extracting a peak signal of an effective peak that meets the setting conditions set by the setting means, and a peak list creation for creating a peak list of the effective peaks extracted by the effective peak discriminating means and means (9c), the signal analyzer to read the value of the signal of the marker the X coordinate corresponding marker in position within the tube surface and display settings of the display unit;
Setting means (8) for setting setting conditions for displaying a current marker (11) whose position can be changed in the spectrum waveform displayed on the display means and a multi-marker (12) for indicating a peak point When,
Display control means for said multi-marker display control said in an ascending order of distance from the current marker to the position of the effective peak of each side a plurality of points around the position on the frequency axis of the current marker based on the previous SL work made peak list (9 d And a signal analyzer. The signal analysis apparatus according to claim 1, wherein the display control means (9d) displays a list of peak frequencies and levels of the multimarkers together with the spectrum waveform on the display means (7) . A frequency converter (2) having a local oscillator (2a) capable of frequency sweeping, mixing an oscillation signal of the local oscillator and a signal under measurement, and converting the signal under measurement into an intermediate frequency signal; and the intermediate frequency signal Receiving and detecting and outputting a detector (4), an A / D converter (5) for converting the output of the detector into digital data, and storing the digital data converted by the A / D converter Based on digital data stored in the storage means, a storage means (6) for transmitting, a sweep control section (3) for sending a sweep signal for sweeping the output frequency of the local oscillator at a predetermined sweep time, and the like. The display means (7) for displaying the spectrum waveform of the measurement signal, the peak detection means (9a) for detecting the peak of the waveform displayed on the display means, and the setting means among the peak signals detected by the peak. Setting The effective peak determination means for extracting a peak signal of the effective peak that meet setting conditions (9b), and a peak list creating means for creating a peak list of valid peaks extracted in the effective peak determining means (9c) in marker display method of the display means of the signal analyzer and the marker display set to a predetermined position of the X coordinate corresponding to the tube surface to read the value of the signal of the marker,
Set the setting condition for displaying the multi-marker (12) for indicating the current marker (11) and the peak point of the position in the displayed the spectrum waveform is a variably on the display means, before Symbol creation marker display method characterized in that said display controlling multi-marker in an ascending order of distance from the current marker to the position of the effective peak of each side a plurality of points around the position on the frequency axis of the current marker on the basis of the peak list. The marker display method according to claim 3 , wherein a list of peak frequencies and levels of each of the multimarkers is displayed on the display means (7) together with the spectrum waveform .

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