JPH055706Y2 - - Google Patents
Info
- Publication number
- JPH055706Y2 JPH055706Y2 JP1987159909U JP15990987U JPH055706Y2 JP H055706 Y2 JPH055706 Y2 JP H055706Y2 JP 1987159909 U JP1987159909 U JP 1987159909U JP 15990987 U JP15990987 U JP 15990987U JP H055706 Y2 JPH055706 Y2 JP H055706Y2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- local
- transmitting
- local oscillator
- receiving
- 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
Links
- 230000010355 oscillation Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000000624 total reflection X-ray fluorescence spectroscopy Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
Landscapes
- Radio Relay Systems (AREA)
- Transceivers (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は衛星通信用地球局に利用される送受信
装置に関し、特に局内折り返し試験回路を必要と
する送受信装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a transmitting/receiving device used in an earth station for satellite communication, and particularly relates to a transmitting/receiving device that requires an intra-station loopback test circuit.
従来、この種の送受信装置は中間周波数（以下
IF周波数と略す）から送信無線周波数（以下
TXRF周波数と略す）に周波数変換するための
ローカル発振器、受信無線周波数（以下RXRF
周波数と略す）からIF周波数に周波数変換する
ためのローカル発振器、及び局内折り返し試験回
路においてTXRF周波数からRXRF周波数に周
波数変換するためのローカル発振器の３つのロー
カル発振器をそれぞれ独立して備えている。
Traditionally, this type of transceiver equipment uses an intermediate frequency (hereinafter referred to as
IF frequency) to transmitting radio frequency (hereinafter referred to as
A local oscillator for frequency conversion to a received radio frequency (hereinafter referred to as RXRF frequency)
It is equipped with three independent local oscillators: a local oscillator for frequency conversion from the IF frequency to the IF frequency, and a local oscillator for frequency conversion from the TXRF frequency to the RXRF frequency in the local loop test circuit.
例えば、第２図は従来の局内折り返し試験回路
を含む送受信装置の一例を示す構成図である。こ
の図において、送信系においてはIF周波数はロ
ーカル発振器１の出力とミキサー３で混合され、
バンドパスフイルタ７で希望の周波数成分だけを
取り出している。また、受信系においては
RXRF周波数はローカル発振器２の出力とミキ
サー４で混合され、バンドパスフイルタ８で希望
のIF周波数だけを取り出している。局内折返し
系ではTXRF周波数はローカル発振器１１の出
力とミキサー６で混合され、バンドパスフイルタ
９でRXRF周波数だけを取り出している。 For example, FIG. 2 is a configuration diagram showing an example of a transmitting/receiving device including a conventional intra-station loopback test circuit. In this figure, in the transmission system, the IF frequency is mixed with the output of local oscillator 1 and mixer 3,
A bandpass filter 7 extracts only desired frequency components. Also, in the receiving system
The RXRF frequency is mixed with the output of the local oscillator 2 by a mixer 4, and a bandpass filter 8 extracts only the desired IF frequency. In the local loopback system, the TXRF frequency is mixed with the output of the local oscillator 11 by a mixer 6, and only the RXRF frequency is extracted by a bandpass filter 9.
上述した従来の送受信装置では、送信系、受信
系及び局内折返し系にそれぞれ独立してローカル
発振器１，２，１１が必要とされるため、各ロー
カル発振器の発振周波数の調整が面倒になるとと
もに、送受信装置が高価になるという問題があ
る。
In the conventional transmitting/receiving device described above, the local oscillators 1, 2, and 11 are required independently for the transmitting system, the receiving system, and the local loopback system, which makes it troublesome to adjust the oscillation frequency of each local oscillator. There is a problem that the transmitting/receiving device becomes expensive.
本考案は、ローカル発振器の数を低減して装置
の調整を簡略化しかつ低価格に構成できる送受信
装置を提供することを目的としている。 SUMMARY OF THE INVENTION An object of the present invention is to provide a transmitting/receiving device that can be configured at low cost and with simplified adjustment of the device by reducing the number of local oscillators.
本考案の送受信装置は、ローカル発振器を有す
る送信系と、他のローカル発振器を有する受信系
と、送信系の信号を受信系に折り返す局内折返し
系とで構成される送受信装置において、前記局内
折返し系に前記送信系及び受信系の各ローカル発
振器の周波数を混合するミキサと、所要の周波数
を選択するバンドパスフイルタとを設け、前記各
ローカル発振器の周波数を用いて局内折返し系の
ローカル発振周波数を得るようにし、局内折返し
系におけるローカル発振器を不要にした構成とし
ている。
The transmitting/receiving device of the present invention includes a transmitting system having a local oscillator, a receiving system having another local oscillator, and an intra-station loopback system that loops back signals from the transmitting system to the receiving system. A mixer that mixes the frequencies of the local oscillators of the transmitting system and the receiving system, and a bandpass filter that selects a desired frequency are provided in the system, and the local oscillation frequency of the local loopback system is obtained using the frequencies of the local oscillators. In this way, the configuration eliminates the need for a local oscillator in the intra-station loopback system.
次に、本考案を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図は本考案の一実施例のブロツク図であ
る。送信系においてはIF周波数はローカル発振
器１の出力とミキサー３で混合され、バンドパス
フイルタ７で希望の周波数成分だけを取り出して
いる。また、受信系においてはRXRF周波数は
ローカル発振器２の出力とミキサー４で混合さ
れ、バンドパスフイルタ８で希望のIF周波数だ
けを取り出している。これらの送信系と受信系に
ついては第２図に示した従来構成と同じである。 FIG. 1 is a block diagram of one embodiment of the present invention. In the transmission system, the IF frequency is mixed with the output of the local oscillator 1 by a mixer 3, and only a desired frequency component is extracted by a bandpass filter 7. In the receiving system, the RXRF frequency is mixed with the output of the local oscillator 2 by a mixer 4, and only the desired IF frequency is extracted by a bandpass filter 8. The transmitting system and receiving system are the same as the conventional configuration shown in FIG.
一方、局内折返し系においては、送信系のロー
カル発振器１と受信系のローカル発振器２の出力
の一部を夫々取り出し、これらをミキサー５で混
合した上でバンドパスフイルタ１０を通してロー
カル発振器１とローカル発振器２の差の周波数成
分（FLO−LO）を取り出している。このバンドパ
スフイルタ１０の出力が局内折返し系のローカル
周波数となり、TXRF周波数（周波数Ｆ）とミ
キサー６で混合されバンドパスフイルタ９で希望
するRXRF周波数（周波数）を取り出してい
る。 On the other hand, in the local loopback system, a part of the outputs of the local oscillator 1 of the transmitting system and the local oscillator 2 of the receiving system are respectively taken out, mixed in the mixer 5, and then passed through the bandpass filter 10 to the local oscillator 1 and the local oscillator 2. The frequency component (F LO - LO ) of the difference between the two is extracted. The output of this bandpass filter 10 becomes a local frequency for the intra-office return system, is mixed with the TXRF frequency (frequency F) in a mixer 6, and a desired RXRF frequency (frequency) is extracted by a bandpass filter 9.
第１図において周波数関係は次のとおりであ
る。 In FIG. 1, the frequency relationships are as follows.
Ｆ＝IF＋FLO、＝IF＋LO
但し、FLO及びLOは夫々ローカル発振器１及び２
の各発振周波数、IFはIF周波数の周波数、Ｆは
TXRF周波数、はRXRF周波数である。 F = IF + F LO , = IF + LO However, F LO and LO are local oscillators 1 and 2, respectively.
Each oscillation frequency, IF is the frequency of IF frequency, F is
TXRF frequency, is RXRF frequency.
したがつて、この構成によれば２つのローカル
発振器１，２の周波数を利用して局内折返し系に
おけるローカル発振周波数を得ているので、局内
折返し系におけるローカル発振器を省略すること
が可能となる。これにより、少なくとも局内折返
し系におけるローカル発振器の調整が不要となり
調整の簡略化を図ることができ、これと同時に装
置の低価格化を達成することができる。 Therefore, according to this configuration, the local oscillation frequency in the intra-station loopback system is obtained using the frequencies of the two local oscillators 1 and 2, making it possible to omit the local oscillator in the intra-station loopback system. This eliminates the need to adjust the local oscillator at least in the intra-office return system, making it possible to simplify the adjustment and at the same time achieve a reduction in the cost of the device.
以上説明したように本考案は、送信系及び受信
系の各ローカル発振器の周波数を混合しかつバン
ドパスフイルタで選択することにより局内折返し
系のローカル発振周波数を得ているので、局内折
返し系におけるローカル発振器を不要にでき、そ
の発振周波数の調整を無くして送受信装置の調整
を容易なものとするとともに、装置を低価格に構
成できる効果がある。
As explained above, the present invention obtains the local oscillation frequency of the intra-station loopback system by mixing the frequencies of the local oscillators of the transmitting system and the receiving system and selecting them with a bandpass filter. This eliminates the need for an oscillator, eliminates the need to adjust its oscillation frequency, facilitates adjustment of the transmitting/receiving device, and has the effect that the device can be constructed at a low cost.
第１図は本考案の送受信装置の一実施例のブロ
ツク図、第２図は従来装置の一例のブロツク図で
ある。
１，２……ローカル発振器、３，４，５，６…
…ミキサー、７，８，９，１０……バンドパスフ
イルタ、１１……ローカル発振器。
FIG. 1 is a block diagram of an embodiment of the transmitting/receiving device of the present invention, and FIG. 2 is a block diagram of an example of a conventional device. 1, 2...Local oscillator, 3, 4, 5, 6...
...Mixer, 7, 8, 9, 10...Band pass filter, 11...Local oscillator.
Claims (1)
ル発振器を有する受信系と、送信系の信号を受信
系に折り返す局内折返し系とで構成される送受信
装置において、前記局内折返し系に前記送信系及
び受信系の各ローカル発振器の周波数を混合する
ミキサと、所要の周波数を選択するバンドパスフ
イルタとを設け、前記各ローカル発振器の周波数
を用いて局内折返し系のローカル発振周波数を得
るように構成したことを特徴とする送受信装置。 In a transmitting/receiving device comprising a transmitting system having a local oscillator, a receiving system having another local oscillator, and an intra-office loopback system that returns signals from the transmitting system to the receiving system, the intra-office loopback system includes the transmitting system and the receiving system. A mixer for mixing the frequencies of each of the local oscillators and a bandpass filter for selecting a desired frequency are provided, and the frequency of each of the local oscillators is used to obtain the local oscillation frequency of the local loopback system. A transmitting/receiving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987159909U JPH055706Y2 (en) | 1987-10-21 | 1987-10-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987159909U JPH055706Y2 (en) | 1987-10-21 | 1987-10-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0165539U JPH0165539U (en) | 1989-04-26 |
| JPH055706Y2 true JPH055706Y2 (en) | 1993-02-15 |
Family
ID=31441526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987159909U Expired - Lifetime JPH055706Y2 (en) | 1987-10-21 | 1987-10-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH055706Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4544976B2 (en) * | 2003-11-27 | 2010-09-15 | 株式会社神戸製鋼所 | Wireless communication device |
| JP6334451B2 (en) * | 2015-03-31 | 2018-05-30 | 株式会社東芝 | Wireless device, folding test device, folding test method |
-
1987
- 1987-10-21 JP JP1987159909U patent/JPH055706Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0165539U (en) | 1989-04-26 |
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