JPH0389722A - Radio transmitter and receiver - Google Patents
Radio transmitter and receiverInfo
- Publication number
- JPH0389722A JPH0389722A JP1226795A JP22679589A JPH0389722A JP H0389722 A JPH0389722 A JP H0389722A JP 1226795 A JP1226795 A JP 1226795A JP 22679589 A JP22679589 A JP 22679589A JP H0389722 A JPH0389722 A JP H0389722A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- line
- signal
- modulation
- signal line
- 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 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Transceivers (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は無線送受信装置に関し、特に高周波部と変復調
部とが分離し、信号ラインで接続されている場合に、送
受信強度信号をライン経由変復調部に転送してモニタす
る無線送受信装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a wireless transmitting/receiving device, and in particular, when a high frequency section and a modulation/demodulation section are separated and connected by a signal line, the transmission/reception strength signal is modulated and demodulated via the line. The present invention relates to a wireless transmitting/receiving device that transmits data to a computer and monitors the data.
従来、この種の無線送受信装置では、第２図の構成図に
示すように、高周波部２０の送信強度モニタ電圧、受信
強度モニタ電圧を変復調部２１に転送する場合に、送受
信強度モニタの入力電圧Ｖ１に比例して搬送波発振器３
を振幅変調器２において、振幅変調した後に、信号ライ
ン１３経由変復調部２１に送る。変復調部２１では振幅
変調検波器６により検波して送受信強度モニタの出力電
圧Ｖ２を出力する。また、信号ライン１３によって高周
波部２０に直流電圧を重畳して供給していた。Conventionally, in this type of wireless transmitter/receiver, as shown in the block diagram of FIG. Carrier wave oscillator 3 proportional to V1
is amplitude-modulated in the amplitude modulator 2 and then sent to the modulation/demodulation section 21 via the signal line 13. The modulation/demodulation section 21 detects the signal using the amplitude modulation detector 6 and outputs the output voltage V2 of the transmitting/receiving strength monitor. Further, a DC voltage was supplied in a superimposed manner to the high frequency section 20 via the signal line 13.
上述した従来の無線送受信装置は転送される振幅変調信
号が直接、送受信強度のモニタ電圧を示しているので、
高周波部２０と変復調部２１とを接続する信号の長さが
変わると信号ラインの損失が変わるたびに振幅変調信号
の振幅値が変わるので、変復調部側での送受信強度モニ
タ電圧Ｖ２が真の指示値を表示しない欠点を有する。し
たがって、信号ライン交換のたびにモニタ電圧の校正を
行わなければならない欠点がある。In the conventional wireless transmitting/receiving device described above, the transmitted amplitude modulation signal directly indicates the monitor voltage of the transmitting/receiving strength.
When the length of the signal connecting the high frequency section 20 and the modulation/demodulation section 21 changes, the amplitude value of the amplitude modulation signal changes each time the loss of the signal line changes, so the transmission/reception strength monitor voltage V2 on the modulation/demodulation section side is the true indication. It has the disadvantage of not displaying the value. Therefore, there is a drawback that the monitor voltage must be calibrated every time the signal line is replaced.
本発明の無線送受信装置は高周波部と変復調部とを第１
および第２の信号ラインで接続された無線送受信装置に
おいて、前記第１の信号ラインを直流電圧および搬送信
号供給用ラインとし、第２の信号ラインを前記直流電圧
のモニタ用ラインとし、前記第２の信号ラインにより電
圧降下したモニタ電圧と基準電圧とを比較する比較回路
と、前記比較回路の出力信号により前記高周波部から送
られてくる送受信強度モニタ電圧のライン電圧降下を補
正する補正回路とを前記変復調部に有する。The wireless transmitter/receiver of the present invention has a high frequency section and a modulation/demodulation section.
and a wireless transmitting/receiving device connected by a second signal line, wherein the first signal line is a DC voltage and carrier signal supply line, the second signal line is a line for monitoring the DC voltage, and the second signal line is a DC voltage and carrier signal supply line, the second signal line is a DC voltage monitoring line, a comparison circuit that compares a monitor voltage dropped by a signal line with a reference voltage; and a correction circuit that corrects a line voltage drop in a transmission/reception strength monitor voltage sent from the high frequency section using an output signal of the comparison circuit. It is included in the modulation/demodulation section.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例の構成図である。第１図にお
いて、変復調部５から２本のラインのうち信号ライン１
１を使って高周波部１に直流電圧Ｖ５を供給し、モニタ
用信号ライン１２で高周波部１に供給された直流電圧Ｖ
５を変復調部５に送り返し、モニタ用信号ライン１２に
よるラインドロツブ分低い電圧Ｖｓ′が出力される。一
方、高周波部ｌからの送受信強度モニタ入力電圧■１を
示す振幅変調信号は従来例と同様の構成で作成され信号
ライン１１により変復調部５に送られる。FIG. 1 is a block diagram of an embodiment of the present invention. In FIG. 1, signal line 1 of the two lines from the modulation/demodulation section 5
1 to supply the DC voltage V5 to the high frequency section 1, and the DC voltage V supplied to the high frequency section 1 through the monitor signal line 12.
5 is sent back to the modulation/demodulation section 5, and a voltage Vs' lower by the line drop caused by the monitor signal line 12 is output. On the other hand, an amplitude modulated signal indicating the transmission/reception intensity monitor input voltage 1 from the high frequency section 1 is created with the same configuration as the conventional example and is sent to the modulation/demodulation section 5 via the signal line 11.
変復調部５ではこの振幅変調信号を検波して平滑し直流
電圧として送受信強度モニタ電圧に変換する。一方、モ
ニタ用ライン１２の直流インピーダンスを高インピーダ
ンスにする抵抗７により直流電圧Ｖｓ′はＶＳよりライ
ンドロツブ電圧分だけ低い、基準電圧源８の電圧Ｖｒと
直流電圧Ｖｓとは比較回路９によって比較される。比較
回路の出力すなわちラインドロップ電圧を表わす出力信
号を使って前述のモニタ出力電圧を補正回路１０を通し
てラインの長さの変化による搬送波の振幅値の変化を補
正して真値の送受信強度モニタ電圧■２を出力する。The modulation/demodulation section 5 detects and smoothes this amplitude modulation signal and converts it into a transmission/reception intensity monitor voltage as a DC voltage. On the other hand, the DC voltage Vs' is lower than VS by the line drop voltage due to the resistor 7 that makes the DC impedance of the monitoring line 12 high, and the voltage Vr of the reference voltage source 8 and the DC voltage Vs are compared by the comparator circuit 9. . Using the output of the comparator circuit, that is, the output signal representing the line drop voltage, the aforementioned monitor output voltage is passed through the correction circuit 10 to correct the change in the carrier wave amplitude value due to the change in line length to obtain the true value of the transmitting/receiving strength monitor voltage. Outputs 2.
以上説明したように本発明は高周波部に供給される直流
電電電圧の信号ラインのラインドロップ電圧を変復調部
で検出する比較回路と高周波部より送られてくる送受信
強度モニタをこの比較回路の検出値で補正する補正回路
とを設けることにより、信号のラインの長さが変わって
も送受信強度モニタ電圧の真値の指示値を示すことがで
きる効果がある。As explained above, the present invention includes a comparison circuit that detects line drop voltage of a signal line of DC electric voltage supplied to a high frequency section in a modulation/demodulation section, and a detection value of the comparison circuit that monitors the transmission/reception intensity sent from the high frequency section. By providing a correction circuit for correcting the signal, an effective indication value of the true value of the transmission/reception intensity monitor voltage can be indicated even if the length of the signal line changes.
第１図は本発明の一実施例の構成図、第２図は従来の無
線送受信装置の構成図である。
１・・・高周波部、２・・・振幅変調器、３・・・搬送
波用発振器、５・・・変復調部、６・・・振幅変調検波
器、７・・・抵抗、
８・・・基準電圧源、
９・・・比較回路、
Ｏ・・・
補正回路、
１・・・信号ライン、
２・・・モニタ用信
号ライン。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional wireless transmitting/receiving device. DESCRIPTION OF SYMBOLS 1... High frequency part, 2... Amplitude modulator, 3... Carrier wave oscillator, 5... Modulation/demodulation part, 6... Amplitude modulation detector, 7... Resistor, 8... Reference Voltage source, 9... Comparison circuit, O... Correction circuit, 1... Signal line, 2... Monitor signal line.
Claims (1)
接続された無線送受信装置において、前記第１の信号ラ
インを直流電圧および搬送信号供給用ラインとし、第２
の信号ラインを前記直流電圧のモニタ用ラインとし、前
記第２の信号ラインにより電圧降下したモニタ電圧と基
準電圧とを比較する比較回路と、前記比較回路の出力信
号により前記高周波部から送られてくる送受信強度モニ
タ電圧のライン電圧降下を補正する補正回路とを前記変
復調部に有することを特徴とする無線送受信装置。In a wireless transmitting/receiving device in which a high frequency section and a modulation/demodulation section are connected by first and second signal lines, the first signal line is a DC voltage and carrier signal supply line, and the second
A signal line is used as a line for monitoring the DC voltage, a comparison circuit compares the monitor voltage dropped by the second signal line with a reference voltage, and a signal is sent from the high frequency section by the output signal of the comparison circuit. A wireless transmitting/receiving device characterized in that the modulation/demodulation section includes a correction circuit for correcting a line voltage drop of a transmission/reception intensity monitor voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1226795A JP3019331B2 (en) | 1989-09-01 | 1989-09-01 | Wireless transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1226795A JP3019331B2 (en) | 1989-09-01 | 1989-09-01 | Wireless transceiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0389722A true JPH0389722A (en) | 1991-04-15 |
| JP3019331B2 JP3019331B2 (en) | 2000-03-13 |
Family
ID=16850736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1226795A Expired - Lifetime JP3019331B2 (en) | 1989-09-01 | 1989-09-01 | Wireless transceiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3019331B2 (en) |
-
1989
- 1989-09-01 JP JP1226795A patent/JP3019331B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3019331B2 (en) | 2000-03-13 |
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