JPH04349793A - Direction adjustment system for antenna - Google Patents

Abstract

PURPOSE:To adjust the direction of an FPU parabolic antenna of a relay car quickly and accurately even at any relay point by displaying the reception state of a base station side onto a CRT display device. CONSTITUTION:An A/D converter 1 and a transmission logic section 2 digitize an analog voltage proportional to a reception electric field strength from a receiver 11 of an FPU 10 and encode the voltage and input the result to a voice channel of a base station side radio telephone set 7 through a modulator 3. A relay car side radio telephone set 8 receives a radio wave from the base station, a demodulator 4 decodes the received code, a reception logic section 5 applies software processing to the decoded signal, the result is outputted onto a CRT display section 6, on which the reception electric field strength of the base station side is displayed graphically. Since the antenna of the FPU 9 is subject to direction adjustment while observing the graphic display, the worker of the relay car side adjusts the reception electric field of the base station through direct visual observation.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an antenna direction adjustment system, and in particular to a field pickup (
(FPU) relates to an antenna direction adjustment method for quickly adjusting a parabolic antenna to an optimal direction.

0002

2. Description of the Related Art Conventionally, this type of antenna direction adjustment method uses a DC voltage proportional to the received electric field strength detected at a base station as a voltage frequency (V/F).
) converter to an audible frequency within the audio band,
It changes the frequency depending on the strength of the received electric field and transmits it to the relay vehicle using a communication radio telephone line. The relay vehicle was adjusted by listening to this tone signal while adjusting the direction of the FPU parabolic antenna.

0003

[Problem to be Solved by the Invention] This conventional antenna direction adjustment method listens for changes in frequency using a handset connected to a communication radio telephone line and adjusts the parabolic antenna for the FPU of the relay vehicle to the optimal direction. Therefore, it is difficult to hear in noisy areas or downtown areas, and it takes time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for displaying the reception status of a base station on a CRT display and for quickly and accurately adjusting the direction of a parabolic antenna for an FPU.

[0005]

[Means for Solving the Problems] The antenna direction adjustment method of the present invention provides an antenna direction adjustment system that connects a relay van equipped with an FPU parabolic antenna for outdoor relaying of television broadcasting, an opposing receiving base station equipped with an FPU parabolic antenna, In an antenna direction adjustment method for an FPU in which a radio telephone device is provided between an relay vehicle and a receiving base station, the receiving base station is equipped with an A/D converter that converts an output voltage according to the received electric field strength into a digital signal. It is equipped with a transmission logic section and a modulator for transmitting using a communication radio telephone line, and the relay vehicle side is equipped with a demodulator, a reception logic section, and a CRT display section to display the field strength received by the base station on the relay vehicle side. Display on the CRT display section.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention. In FIG. 1, the A/D converter 1 and the transmission logic section 2 are FP
The analog voltage proportional to the received electric field strength from the receiver 11 of U10 is digitized, further encoded, and input to the voice channel of the base station side radio telephone device 7 by the modulator 3. The relay vehicle side radio telephone device 8 receives radio waves from the base station, restores the received code by the demodulator 4, performs software processing in the reception logic section 5, and then displays the CRT display section 6.
The received field strength on the base station side is displayed graphically. Since the direction of the antenna of the FPU 9 is adjusted while looking at this graph display, the operator on the relay vehicle side can directly visually adjust the receiving electric field of the base station.

[0007]

Effects of the Invention As explained above, the present invention makes it possible to directly check the maximum point of the received field strength of the base station on the CRT display section on the relay vehicle side, so that the FPU parabola of the relay vehicle can be checked at any relay point. This has the effect that the direction of the antenna can be adjusted quickly and accurately.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

[Explanation of symbols]

1 A/D converter 2 Transmission logic section 3 Modulator 4 Demodulator 5 Reception logic section 6 CRT display section 7 Base station side wireless telephone device 8　　　Relay car side radio telephone device

Claims (2)

[Claims] [Claim 1] F for outdoor broadcasting of television broadcasts
A broadcast vehicle equipped with a PU parabolic antenna and an opposing FP
In the antenna direction adjustment method for FPU, which has a receiving base station equipped with a U parabolic antenna and a communication radio telephone device between the relay vehicle and the receiving base station, the receiving base station has It is equipped with an A/D converter that converts the output voltage into a digital signal, a transmission logic section, and a modulator for transmitting using a communication radio telephone line, and the relay vehicle side has a demodulator, reception logic section, and CRT display. 1. An antenna direction adjustment method, comprising: displaying a base station received electric field strength on a CRT display section of a relay vehicle. 2. A reception logic section of the relay vehicle is connected to the CRT.
2. The antenna direction adjustment method according to claim 1, wherein software processing is performed to graphically display the received electric field strength on a display unit.