JPH0293379A - Transmission spurious measuring apparatus - Google Patents
Transmission spurious measuring apparatusInfo
- Publication number
- JPH0293379A JPH0293379A JP24445088A JP24445088A JPH0293379A JP H0293379 A JPH0293379 A JP H0293379A JP 24445088 A JP24445088 A JP 24445088A JP 24445088 A JP24445088 A JP 24445088A JP H0293379 A JPH0293379 A JP H0293379A
- Authority
- JP
- Japan
- Prior art keywords
- output
- transmission
- input
- counter
- bpf
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 36
- 238000001228 spectrum Methods 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 5
- 101100249083 Human cytomegalovirus (strain Merlin) RL12 gene Proteins 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、送信機の送信スプリアス測定装置に関し、特
に、特定の周波数帯において高品質の送信スプリアスを
測定する場合における送信波のリジェクション方法に関
する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a transmission spurious measurement device for a transmitter, and in particular, a transmission wave rejection method when measuring high quality transmission spurious in a specific frequency band. Regarding.
従来、この種の送信スプリアス測定では第５図に示すよ
うに、スペクトラムアナライザ５３に対してダイナミッ
クＶンジで約６０ ｄＢ以下となる様に可変型の帯域除
去フィルタ（以下、 ＢＥＦと略す）５２を使用してお
り１手操作にて同調をとり、送信波をリジェクションし
て同一の送信周波数毎にスプリアスの測定を実施してい
た。Conventionally, in this type of transmission spurious measurement, as shown in FIG. 5, a variable band-elimination filter (hereinafter abbreviated as BEF) 52 is attached to a spectrum analyzer 53 so that the dynamic V range is approximately 60 dB or less. I was using one-handed tuning, rejecting the transmitted waves, and measuring spurious signals for each of the same transmitting frequencies.
従来のＢＥＦの手操作による送信波のリジェクション方
法では、 ＢＥＦの同調に時間がかかる。しかも、 Ｂ
ＥＦの同調を変更しない限シ同一の送信周波数のものし
か測定出来ず、自動測定をする場合においてその運用が
非効率的であるという欠点があ性を生かし、２個以上の
ＢＰＦを用意して、その内２個以上を組み合わせること
によって送信波１鷺リジェクシ、ンさせ、なおかつこの
組み合わせ全自動的に選択することにより、高品質の送
信スズリアスを効率的に測定する装置を提供しようとす
るものである。In the conventional method of manually operating the BEF to reject transmitted waves, it takes time to tune the BEF. Moreover, B
Unless the tuning of the EF is changed, only the same transmission frequency can be measured, and the operation is inefficient when performing automatic measurements. By combining two or more of them, one transmission wave can be rejected, and by selecting this combination completely automatically, we aim to provide a device that efficiently measures high-quality transmission waves. be.
本発明による送信スプリアス測定装置は、複数のＢＰＦ
の組み合わせを切替える回路と、送信周波数測定用のカ
ウンタと、該カウンタの出力にもとづいて前記切替回路
を制御する機能を有する制御部と、スペクトラムアナラ
イザとを含む。The transmission spurious measurement device according to the present invention includes a plurality of BPFs.
A counter for measuring the transmission frequency, a control unit having a function of controlling the switching circuit based on the output of the counter, and a spectrum analyzer.
（実施例〕
第１図は本発明による送信スプリアス測定方法を実施す
る装置の一例で、 ＢＰＦ切替回路１１．制御部１２．
カウンタ１３及びスペクトラムアナライザ１４とを有し
ている。制御部１２はＢＰＦ切替回路１１．カウンタ１
３．スペクトラムアナライザ１４を制御する機能を持つ
。なお、 １３ＰＦ切替回路１１内のりレーＲＬＩ〜Ｒ
Ｌ１２は同軸すＶ−ＢＰＦ １〜５は帯域戸波器金表わ
している。(Embodiment) FIG. 1 shows an example of a device implementing the transmission spurious measurement method according to the present invention, which includes a BPF switching circuit 11. a control unit 12.
It has a counter 13 and a spectrum analyzer 14. The control unit 12 includes a BPF switching circuit 11. counter 1
3. It has a function of controlling the spectrum analyzer 14. In addition, the relays RLI to R in the 13PF switching circuit 11
L12 is a coaxial V-BPF. 1 to 5 are band wave filters.
第２図は送信スプリアス規格の一例で、５００〜５２０
ＭＨｚ （送信周波数±２．９ ＭＨｚは省く）の帯
域は一６７ｄＢｍ以下、それ以外は−３０ｄＢ ｍであ
ることを表わしている。Figure 2 shows an example of the transmission spurious standard, which is 500 to 520.
The band of MHz (excluding the transmission frequency ±2.9 MHz) is -67 dBm or less, and the band other than that is -30 dBm.
第３図は第１図のＢＰＦ切替回路１１におけるＢＰＦの
組み合わせによる周波数力・ぐ−範囲の一例で１例えば
送信波から−２，９ＭＨｚ離れを測定する時は、 ＢＰ
Ｆ １ ｅ ２を選択し、測定周波数範囲は５１０．３
〜５１２．６ ＭＨｚの範囲であることを示している。Figure 3 shows an example of the frequency power range due to the combination of BPFs in the BPF switching circuit 11 of Figure 1.1For example, when measuring -2.9MHz away from the transmitted wave, BP
Select F 1 e 2, measurement frequency range is 510.3
~512.6 MHz.
第４図はＢＰＦ １ 、２の特性の一例で２組み合わせ
による測定周波数範囲は５１０．３〜５１２．６ＭＨｚ
＊送信周波数のリジェクション値は各３６ｄＢ。Figure 4 is an example of the characteristics of BPF 1 and 2, and the measurement frequency range for the combination of the two is 510.3 to 512.6 MHz.
*Rejection value for each transmission frequency is 36dB.
２３ ｄＢであることを表わしている。This indicates that it is 23 dB.
ここで、第１図を参照してＢＰＦ切替回路１１について
説明する。すｖ−ＲＬＩは被測定物である送信機１０の
出力を入力とし、ＡかＢの出力に前記入力を出力するよ
うに切シ替える。すｖ −ＲＬ２は、すｖ−ＲＬＩの出
力Ａを入力とし、ＡかＢの出力に前記入力を出力するよ
う切シ替える。リレーＲＬ３は、リレーＲＬＩの出力Ｂ
を入力とし。Here, the BPF switching circuit 11 will be explained with reference to FIG. The Sv-RLI takes the output of the transmitter 10, which is the object to be measured, as an input, and switches to output the input to the output A or B. The subv-RL2 takes the output A of the subv-RLI as an input, and switches to output the input to the output of A or B. Relay RL3 is output B of relay RLI
As input.
ＡかＢの出力に前記入力を出力するよう切り替える。リ
レーＲＬ４は、リレーＲＬ２の出力Ａｉ大入力、＋）ｖ
−ＲＬ８の出力Ａを入力Ｂとして前記入力ＡかＢのいず
れかを出力するよう切り替える。The input is switched to output A or B. Relay RL4 is the output Ai large input of relay RL2, +)v
- Switch output A of RL8 to input B and output either input A or B.
リレーＲＬ５は、すｖ−ＲＬ２の出力Ｂを人力Ａ、リレ
ーＲＬ９の出力Ａを入力Ａとして前記入力ＡかＢのいず
れか全出力するよう切り替える。Relay RL5 switches output B of sub-RL2 to human power A, output A of relay RL9 to input A, and outputs either input A or B in full.
すｖ−ＲＬ６は、すｖ−ＲＬ３の出力Ａを入力Ａ。Sv-RL6 receives output A of Sv-RL3 as input A.
ＢＰＦ ５の出力を入力Ｂとして前記入力ＡかＢのいず
れかを出力するよう切り替える。リレーＲＬ７は、 Ｂ
ＰＦ ２の出力を入力とし、出力ＡかＢに前記入力を出
力するよう切り替える。リレーＲＬ８は。The output of BPF 5 is set as input B, and the output is switched to either input A or B. Relay RL7 is B
The output of PF 2 is input, and the input is switched to output A or B. Relay RL8.
ＢＰＦ ３の出力を入力とし、出力ＡかＢに前記入力を
出力するよう切り替える。すｖ−ＲＬ９は。The output of BPF 3 is input, and the input is switched to output A or B. Sv-RL9 is.
ＢＰＦ ４の出力を入力とし、出力ＡかＢに前記入力を
出力するよう切り替える。The output of BPF 4 is taken as an input, and the input is switched to output A or B.
すｖ−ＲＬＩＯは、 ＢＰＦ １の出力を入力Ａ、リレ
ーＲＬ７の出力］１１−人力Ｂとし、前記入力ＡかＢい
ずれかを出力するよう切り替える。すＶ−ＲＬＩＩは、
リレーＲＬ８の出力Ｂを入力Ａ、リレーＲＬ９の出力Ｂ
ｔ−人力Ｂとし、前記入力ＡかＢのいずれかを出力する
よう切シ替える。リレーＲＬ１２は、リレーＲＬＩＯの
出力を入力Ａ、リレーＲＬＩＩの出力を入力Ｂとし、前
記入力ＡかＢのいずれかを出力するよう切シ替える。Sv-RLIO takes the output of BPF 1 as input A, the output of relay RL7]11-human power B, and switches to output either input A or B. The V-RLII is
Output B of relay RL8 is input A, output B of relay RL9
t-manpower B, and switch to output either the input A or B. Relay RL12 uses the output of relay RLIO as input A and the output of relay RLII as input B, and switches to output either input A or B.
次に、装置全体の動作について説明する。Next, the operation of the entire device will be explained.
第２図の帯域において第３図のような送信周波数（出力
＋４０ｄＢｍ）の送信スプリアスを測定しようとする時
、従来は送信周波数毎にＢＥＦを手操作にて同調をとっ
た後測定を実施している。本発明ではこの手操作部分を
省くために第１図の装置により以下のプロセスを自動化
している。When trying to measure the transmission spurious at the transmission frequency (output +40 dBm) shown in Figure 3 in the band shown in Figure 2, conventionally the measurement was performed after manually tuning the BEF for each transmission frequency. There is. In the present invention, in order to eliminate this manual operation, the following process is automated using the apparatus shown in FIG.
最初に、 １３ＰＦ切替回路ｌｌ内の各経路の損失を補
正値として制御部１２に記憶させる。次に、送信周波数
をカウンタ１３にて測定し、その結果を制御部１２で判
断してＢＰＦの組み合わせを決定する。制御部１２は更
に、決定した組み合わせのリレーＲＬを動作させる。こ
のようにしてスペクトラムアナライザ１４にて送信スプ
リアスを測定し。First, the loss of each path in the 13PF switching circuit 11 is stored as a correction value in the control unit 12. Next, the transmission frequency is measured by the counter 13, and the result is judged by the control section 12 to determine the combination of BPFs. The control unit 12 further operates the determined combination of relays RL. In this way, the transmission spurious is measured by the spectrum analyzer 14.
その結果を制御部１２で補正して真の測定値を導き出す
。The result is corrected by the control unit 12 to derive the true measured value.
次に、−例として送信周波数５１５．５ ＭＨｚＯ時こ
とができる利点がある。Next, there is an advantage that, for example, the transmission frequency is 515.5 MHz.
しようとすると、測定可能な周波数範囲は第３図の帯域
Ａ （５１０，３〜５１２．６ ＭＨｚ ）で使用する
のはＢＰＦ １ 、２であることが判る。When attempting to do so, it is found that the measurable frequency range is band A (510.3 to 512.6 MHz) in FIG. 3, and BPF 1 and 2 are used.
又、第４図によシその帯域のロス変動は約ＯｄＢ。Also, as shown in Figure 4, the loss variation in that band is approximately OdB.
リジェクション値は、 ＢＰＦ １で送信周波数よシ４
、４ ＭＨｚ離れ３６ ｄＢ 、 ＢＰＦ’ ２で送信
周波数より３、２ ＭＨｚ離れ２３ｄＢとなる。The rejection value is BPF 1 and transmission frequency 4.
, 36 dB at a distance of 4 MHz, and 23 dB at a distance of 3.2 MHz from the transmission frequency at BPF' 2.
従って、４０ｄＢ （送信出力）−（３６ｄＢ＋２３ｄ
Ｂ ）＝−１９ｄＢｍとなり、−６７ｄＢｍに対して４
８ ｄＢ差となり、スペクトラムアナライザ１４（一般
的にグイナミックレンゾ約６０ ｄＢ以下で使用）をス
ムーズに使用出来る。Therefore, 40dB (transmission power) - (36dB + 23d
B ) = -19 dBm, which is 4 for -67 dBm.
The difference is 8 dB, and the spectrum analyzer 14 (generally used at about 60 dB or less) can be used smoothly.
さらに、 ＢＰＦの数量を増加させれば測定可能な帯域
を一段と拡げることが出来る。Furthermore, by increasing the number of BPFs, the measurable band can be further expanded.
以上説明したように本発明によれば、従来の測定方法に
比べて送信スプリアスの自動測定を効率的に実施出来る
ため、測定時間１人員を削減するAs explained above, according to the present invention, automatic measurement of transmission spurious can be carried out more efficiently than conventional measurement methods, so the measurement time and the number of personnel can be reduced.
第１図は本発明による送信スプリアス測定装置の一例の
ブロック図、第２図は送信スプリアス規格の一例を示し
た図、第３図は第１図のＢＰＦ切替回路におけるＢＰＦ
の組み合わせによる周波数カバー範囲の一例を示した図
、第４図は第１図におけるＢＰＦ １ ＊ ２の特性の
一例を示した図、第５図は従来の送信スプリアス測定装
置の一例を示した図。
図中、１０は被測定物（送信機）、１１はＢＰＦ切替回
路、１２は制御部、１３はカウンタ、１４はスペクトラ
ムアナライザ、ＲＬ１〜ＲＬ１２は同軸リレー、 ＢＰ
Ｆ １〜ＢＰＦ ５は帯域戸波器。Fig. 1 is a block diagram of an example of a transmission spurious measurement device according to the present invention, Fig. 2 is a diagram showing an example of a transmission spurious standard, and Fig. 3 is a block diagram of an example of a transmission spurious measurement device according to the present invention.
FIG. 4 is a diagram showing an example of the characteristics of BPF 1 * 2 in FIG. 1, and FIG. 5 is a diagram showing an example of a conventional transmission spurious measurement device. . In the figure, 10 is an object to be measured (transmitter), 11 is a BPF switching circuit, 12 is a control unit, 13 is a counter, 14 is a spectrum analyzer, RL1 to RL12 are coaxial relays, BP
F1 to BPF5 are band wavers.
Claims (1)
信スプリアスを測定する装置であって、前記複数の帯域
濾波器の組み合わせを切替える回路と、送信周波数測定
用のカウンタと、該カウンタの出力にもとづいて前記切
替回路を制御する機能を有する制御部と、スペクトラム
アナライザとを含む送信スプリアス測定装置。1. A device for measuring transmission spurious using multiple types of bandpass filters with different passbands, comprising a circuit for switching combinations of the plurality of bandpass filters, a counter for measuring the transmission frequency, and an output of the counter. A transmission spurious measurement device including a control section having a function of controlling the switching circuit based on the above, and a spectrum analyzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24445088A JPH0627750B2 (en) | 1988-09-30 | 1988-09-30 | Transmission spurious measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24445088A JPH0627750B2 (en) | 1988-09-30 | 1988-09-30 | Transmission spurious measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0293379A true JPH0293379A (en) | 1990-04-04 |
| JPH0627750B2 JPH0627750B2 (en) | 1994-04-13 |
Family
ID=17118834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24445088A Expired - Lifetime JPH0627750B2 (en) | 1988-09-30 | 1988-09-30 | Transmission spurious measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0627750B2 (en) |
-
1988
- 1988-09-30 JP JP24445088A patent/JPH0627750B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0627750B2 (en) | 1994-04-13 |
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