JPS594672B2 - Display device for tracking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for tracking a mobile station that emits television radio waves, for example, and particularly to a display device used in such a tracking device.

Conventionally, direction finding technology for tracking mobile stations in the microwave band has been developed in the technical fields of artificial sanitation and aircraft tracking, and can be roughly divided into three types: conical scan method, higher-order mode detection method, and multi-horn monopulse method. Two methods are mainly used.

The conical scan method has a large pull-in angle and is easy to operate, has a simple power supply system, and only requires one tracking receiver, but in order to perform a conical scan, the primary horn or reflector of the antenna must be eccentric and rotated at high speed. Because there is
This method has problems in terms of maintenance and reliability, and is not suitable for providing a small and lightweight tracking device.

The higher-order mode detection method is currently widely used for artificial hygiene tracking, and although it has excellent performance, the device is significantly large and expensive, so it is not suitable for the purpose of providing a small and lightweight tracking device. do not.

Does the multi-horn monopulse method have the disadvantages of the above two methods? Compared to the conical scan method, the power supply system is more complex, the pull-in angle is smaller, and the input circuit of the tracking receiver includes 5 or 6 hybrid circuits. Because it uses a so-called three-dimensional circuit, it is large and heavy.

Furthermore, in order to widen the pull-in angle, a low-gain auxiliary antenna is also used, but this also complicates the configuration of the antenna system.

The present inventors improved the drawbacks of the multi-horn monopulse method and took advantage of its advantages, thereby producing a lightweight, compact, and low-cost tracking device with excellent operability.

This tracking device includes a multi-horn antenna that receives radio waves emitted from a radio wave source to be tracked, and a multi-horn antenna that is mounted so that the main axis of the multi-horn antenna can be directed in the direction in which the radio waves arrive. A hybrid circuit consisting of a rotatably arranged support member, a microstrip line that adds and/or subtracts between the outputs of the multi-horn antenna, and a hybrid circuit that processes the output of this hybrid circuit and processes the direction of arrival of radio waves. and a circuit for generating tracking information including signals representing errors in azimuth and elevation angles with respect to the direction of the main axis of the multi-horn antenna, and signals representing field strength of received radio waves.

This tracking device uses a micro-strip line in place of the three-dimensional circuit used in the input circuit of the conventional tracking receiver described above, making it dramatically smaller, lighter, and cheaper.

Normal three-dimensional circuits use waveguides as the lines and Magic T as the hybrid circuit, so the three-dimensional circuit itself is large, heavy, and expensive, so the hybrid circuit is
Input circuits that require six or more input circuits are larger, heavier, and
The price will be high.

On the other hand, microstrip lines have a structure in which an insulating plate with a conductor in the center is sandwiched between conductors, and can be easily manufactured using printed circuit board technology, making it extremely small compared to ordinary three-dimensional circuits. It can be made lightweight.

By using the rat race circuit produced using this technology as a hybrid circuit and using coaxial tubes or coaxial cables as the line, we were able to achieve dramatic reductions in size, weight, and cost.

Displays the tracking information output from such a tracking device,
Based on this display, the operator can drive the antenna to correctly point it in the direction in which the radio waves arrive, but multi-horn antennas have a narrow pull-in angle and due to the multipath of the radio waves, they can direct the radio waves coming from other directions or the side ropes of the antenna to the correct direction of the arrival of the radio waves. There is a drawback that the direction may be incorrectly detected.

On the other hand, there are cases where a better quality image can be obtained by matching the arrival direction of radio waves coming from other directions using multipath.

In the latter case, it is difficult to quickly and accurately point the antenna in the direction in which the correct radio waves arrive just by knowing the tracking information.

In order to solve this problem, it is possible to display the received television video signal on a monitor and direct the antenna in the correct direction of arrival of the radio waves while observing this, but the TV displayed on the monitor It is also difficult to accurately and quickly direct the antenna in a desired direction using only the John image.

Therefore, the tracking information supplied from the tracking device and the television video signal are respectively displayed on the monitor screen.
It is also conceivable to comprehensively judge the contents of both of these images and direct the antenna in the direction in which the correct radio waves arrive.

However, such a solution requires a minimum of two monitors, making the configuration complex, large and heavy, and requires adjusting the direction of the antenna while viewing the two monitor screens. Because it doesn't happen,
It has the drawbacks of poor operability and lack of speed and accuracy.

The present invention eliminates the above-mentioned drawbacks, and provides a display device for a tracking device that can quickly and accurately direct an antenna to the correct arrival direction of radio waves, and can be simple in construction, small in size, and light in weight. .

The present invention provides a multi-horn antenna that receives television waves emitted from a television radio wave generation source to be tracked, and a multi-horn antenna that is mounted so that the main axis of the multi-horn antenna is oriented in the direction of arrival of the television radio waves. A tracking device comprising a support member rotatably arranged so as to be able to direct the multi-horn antenna, and a circuit for processing the output of the multi-horn antenna to generate tracking information, using a cathode ray tube as a display means, The tracking information and the received television video signal are simultaneously displayed on the screen of the apparatus.

In one embodiment of the present invention, the antenna receives DC voltages representing the azimuth angle error and the elevation angle error between the main axis of the multi-horn antenna and the arrival direction of the television radio wave, and moves on the cathode ray tube screen surface in accordance with these DC voltages. A means for projecting a moving brightness at a predetermined position on the cathode ray tube screen surface and a means for projecting a fixed brightness at a predetermined position on the screen surface of the cathode ray tube are provided. is a fixed bright spot, and means is provided for receiving a DC voltage representing the electric field strength of an incoming radio wave as tracking information and projecting a bright line having a length corresponding to the DC voltage on the screen surface of the cathode ray tube.

By using such a display device, it is possible to easily and reliably know the correct arrival direction of radio waves.

In addition to displaying received television images on the cathode ray tube screen, there are also bright spots fixed at a fixed position on the screen (center in this example), bright spots that move depending on the direction of arrival of radio waves, and bright spots that display received radio waves. Generates bright lines proportional to intensity.

The horizontal and vertical positions of the moving bright spot are determined by the azimuth angle of the main axis of the antenna and the radio wave arrival direction (hereinafter referred to as 1-A) with the fixed bright spot as the center.
It's called ZJ.

) error ΔAZ and elevation angle (hereinafter referred to as 1'-ELJ).

), so if you look at the position of the moving bright spot with respect to the fixed bright spot, ΔA, Z, and ΔE
By knowing L and adjusting the direction of the antenna so that the moving bright spot overlaps the fixed bright spot, the operator can correctly point the antenna in the direction in which the radio waves arrive.

The length of the bright line expands and contracts in proportion to the received strength of the radio waves, and reaches its maximum when the main axis of the antenna is correctly oriented towards the direction in which the radio waves arrive, so the operator adjusts the direction of the antenna in the direction that increases the length of the brightness. However, the direction of arrival of the radio waves can also be determined by finding the point where the maximum value is reached.

In reality, if you make adjustments while comparing both the bright spot and the bright line, you can quickly point the antenna in the direction in which the radio waves arrive.

The disadvantage of the multi-horn antenna mentioned above is that the angle of entry is narrow and radio waves coming from other directions or side ropes of the antenna are erroneously detected in the main axis direction due to the multipath of the radio waves. This problem can be easily solved by displaying the image on a cathode ray tube screen and observing the image quality of this screen.

What is the quality of the image obtained by multi-pass or side rope?

The image quality is inferior to that obtained when the main axis of the antenna is directed in the direction in which the radio waves arrive, so it is easy to distinguish between the two.

As described above, the direction of the antenna can be quickly and reliably adjusted while observing fixed bright spots, moving bright spots, expanding and contracting bright lines, and images projected on the same cathode ray tube screen surface.

In the display device for a tracking device of the present invention, in order to supply the received television video signal to the cathode ray tube, it is preferable to use a television receiving device designed to be compact and suitable for mobile work. , a tracking device suitable for various types of mobile work can be obtained.

A television receiving device suitable for this purpose is the FP, which has already been developed as a mobile television relay device.
The receiver of the U (FieldPick-Up) device can be used as is.

The tracking device with a display device according to the present invention is lightweight, compact, waterproof, and easy to operate, making it suitable for mobile operations.
Alternatively, it can be transported by hand, so it can be transported to any terrain, set up a tracking base station, and from this base station, helicopters, vehicles, ships, and any other type of mobile television transmitter can be quickly and reliably transmitted. can be tracked.

By relaying from this base station to a broadcasting station or a relay station on the main line, you can connect to the national broadcasting network, so even in mountainous areas where fixed tracking base stations cannot reach the service area, helicopters can Live broadcasts can be carried out from broadcast sites with mobile television transmitters of any type, from vehicles to ships or from any other type of mobile television transmitter.

The present invention will be described in detail below with reference to Examples.

FIG. 1 is an external view of a tracking device configured to be suitable for use by manual operation.

A parabolic reflector 1, a multi-horn antenna mount 2, a tracking receiver 3, a cathode ray tube (hereinafter referred to as CRT) monitor 4, and an FPU receiver 5 are mounted on a single board 6, and this board is mounted on a tripod using a pan head 7. It is designed to rotate freely up and down, left and right, and to direct the main axis of the antenna in any direction.

The multi-horn antenna is composed of four horn antennas 8 to 11 for detecting the azimuth angle error ΔAZ and the elevation error ΔEL, and the other is a horn antenna that receives video signals to these four horn antennas 8 to 11. In some cases, the antenna is composed of a total of five horn antennas, including one antenna 12, but in the embodiment, the latter can obtain a better quality image, and it is necessary to create a bright line signal proportional to the received radio wave intensity. The structure consists of the above five items.

These multi-horn antennas 8 to 12 are covered by a cover 13 to protect them from mechanical damage, dust, rainwater, etc.

The method of arranging the four horn antennas 8 to 11 for detecting ΔAZ and ΔEL is to arrange the four horn antennas 8 to 11 at equal intervals at points P1 to P, as shown in FIG. Side P1P2. P3P□ and P I P
< , P2 and P3 respectively horizontally and vertically, and as shown in Fig. 4, each horn antenna 8 to 1
1 is placed at point P6P9, and opposing points P6 and P8 and P7 and P9 are placed on vertical and horizontal lines, respectively. However, as will be described later, in the hybrid circuit of the next stage, in the case of Fig. 3, 4 The method shown in FIG. 4 is adopted in this embodiment because three hybrid circuits are required in the case of FIG. 4, whereas three hybrid circuits are required.

Further, the horn antenna 12 for taking out the video signal is both placed at the center point P5 of the quadrilateral.

The received signals of the horn antennas 8.9, 10, 11 are led to the input circuit of the tracking receiver 2 via coaxial lines 14, 15, 16, 17 of the same length, respectively.

In the input circuit of FIG. 3, four hybrid circuits 18, 19, 20, and 21 are used to sum the outputs of each horn antenna (referred to as "sum" below).

), an output ΔAZ (M) proportional to the azimuth angle error ΔAZ, and an output ΔE L (M) proportional to the elevation angle error ΔEL are calculated.

The hybrid circuit is a rat race circuit made into a micro-strip line using printed circuit board technology, and as shown in Figure 2, it forms a ring with the length of the circumference λ (λ is the wavelength). If four terminals are provided adjacent to each other at intervals of A, and signals X and Y are input from two of these terminals, respectively,
The sum (x + y) and the difference (x - y) from the other two locations
) is what is output.

When using this hybrid circuit to create the configuration shown in FIG. 3, the received signals of horn antennas 8 to 11 are
, C, D, the hybrid circuit 18 generates (A
10B) and (A-B), (C+D) and (D-0) can be obtained by the hybrid circuit 19, and by further adding these sums and differences to the hybrid circuits 20 and 21, the hybrid circuit 20 by (A+B
) +(0+D) i.e. SUM and (A+B)-
(0+D), that is, ΔEL(M), is converted by the hybrid circuit 21 to (A+D)−(B+C, that is, ΔAZ(
M) can be obtained.

Reference numeral 22 is a pseudo load that terminates the differential output circuit in the hybrid circuit 20.

In the circuit of FIG. 4, if the received signals of the horn antennas 8 to 11 are E, F, G, and H, respectively, (E-G) and (F-H) immediately become ΔEL(M) and ΔAZ(M). Therefore, the hybrid circuit 23 calculates (E-G), that is, ΔEL(M) and (E+G), and the hybrid circuit 24 converts (F-H), that is, ΔAZ(M) and (F+
H) is obtained, and the hybrid circuit 25 calculates (E+F+
G+H), that is, SUM can be obtained.

Further, numeral 26 is the same pseudo load as numeral 22.

The circuit of FIG. 4 can thus perform the required operations using three hybrid circuits.

The outputs of the receiving circuit are ΔAZ(M) and ΔE L(M
) DC output ΔAZ (DC) and ΔEL(DC) are required, which are proportional to the amplitude of each channel, so two systems of receiving circuits are required, but in order to perform common reception with one system, it is modulated ΔAZ (M), ΔEL (M) and SUM are combined, amplified in an intermediate frequency circuit, transversely waved, and then ΔAZ and Δ
A method is used to separate the EL component.

Figure 5 is a system diagram of the stage after the input circuit of the receiving circuit, and shows ΔEL (M) and ΔAZ (M) detected by the input circuit.
(FIGS. 6A and B) The pin diodes 27 and 28 are switched by switching signals having a phase difference of 90°.

As shown in FIGS. 6C and 6D, these switching signals 4L are low frequency rectangular waves and are generated by the switching signal generation circuit 40.

The switched ΔEL(M) is the hybrid circuit 2
9 are added together to form a signal as shown in FIG. 6E, and this signal is further added to SUM by the hybrid circuit 31 and sent to the subsequent circuit.

Reference numerals 30 and 32 are the same pseudo loads as 22 and 26.

In the receiving circuit at the latter stage, the frequency is converted to an intermediate frequency by a mixer 34 and a local oscillator 35 via a bandpass filter 33, amplified by an amplifier 36, and an intermediate frequency F waver 37.
After passing through, it is further amplified by an amplification device 38.

Reference numeral 39 is an AGC circuit that controls the gains of the amplifiers 36 and 38.

The input to the tracking receiver changes widely depending on the strength of the incoming radio waves as well as the direction adjustment of the antenna, so it is necessary to allow for a level difference of about 60 db, and the AGC circuit 39 responds to this level difference. It is configured so that it can be done.

The output of the amplifier 38 is detected by the detector 41 and
The output is shown in FIG. F, and the demodulators 42 and 43 remove the DC component of the detected output.

At this time, the same switching signals as applied to the pin diodes 27 and 28 are applied to these demodulators to separate the ΔEL and ΔAZ components as shown in FIG. Thereafter, direct current components ΔEL (DC) and ΔA Z (DC) are extracted by 5 Hz low-pass P wave generators 46 and 47 as shown in FIGS. 6 and 6.

ΔEL(DCS) and ΔAZ(D
C) In a normal automatic tracking device, instructions are sent to the meter and the rotation mechanism of the antenna is controlled via a servo circuit, but when using this method, it is a large and heavy equipment, so the front As mentioned in , correct radio waves can be detected by observing the bright spots that move due to the television images ΔEL and ΔAZ generated on one CRT screen, the fixed bright spots, and the bright lines whose length is proportional to the intensity of the received radio waves. A method is used to determine the direction of arrival.

FIG. 7 is a system diagram of the display device in the tracking receiver, and FIG. 8 is an explanatory diagram showing the principle of operation.

The display circuit shows ΔEL (DC) and ΔA of the receiving circuit output.
Z (DC), video output from the FPU receiver, and DC output (field strength level) proportional to the strength of the received radio waves are added.

The position of the bright spot and the length of the bright line are ΔAZ(DC), ΔEL
(The values obtained by converting the DC and electric field strength levels into digital values, the horizontal direction by counting the pulses from a separately provided pulse generator, and the vertical direction by counting the scanning lines and expressing this as a digital value, both It is determined by finding the point where the digital values of

Since the ΔAZ (DC), ΔEL (DC) and level inputs have fluctuations due to the direction adjustment of the antenna, they are sampled and held by the sample and hold circuits 48, 49 and 50 when the vertical synchronization pulse is applied, and the A/D converter 5
1, 52 and 53, it is converted into an 8-bit digital value.

Since the A/D converters 51 and 52 are set for bipolarity, when the input is 15■, it is "0", and when the input is Ov, it is "12".
8", when +5V [converts to 256J, 53 is set for unipolar, so when the input is Ov "0",
When +5■, 1128J+10■ is converted to "256".

The position of the moving bright spot before ΔAZ(DC) is 0 is at the center of the screen, at the left edge when it is -5V, at the right edge when it is +5V, and at the center of the screen when ΔEL(DC) is Ov, at the center of the screen at -5V. When it is +5V, it is the upper end, and when it is +5V, it is the lower end.

A synchronization signal separation circuit 63 separates horizontal and vertical synchronization signals from the video signal input.

Pulse generator 64 for determining the horizontal position of the bright spot
is arranged to generate 256 pulses during the active horizontal scanning period of the screen.

The delay counter 65 delays counting for a specified period from the horizontal synchronizing pulse so that counting starts at the left edge of the screen, and counts 256 at the right edge of the screen.

Since the output of the pulse generator 64 and the output of the telecounter 65 are added to the anti-game controller 6, this output becomes a train of 256 pulses during the effective screen period.

This pulse train is sequentially applied to the main counter 67 and converted into a digital value, and this digital value is applied to a comparator 54 and compared with the digital value of the A/D converter 51.

When the digital value of the main counter 67 gradually increases from "0" and matches the digital value of the A/D converter 51, a signal is output from the comparator 54 and added to the AND gate 79.

This value gives the horizontal center value of the moving bright spot.

The switch 57 gives the width a of the moving bright spot, and turns on the output of the comparator for a period of ±a/2 from the above center value.

The horizontal center position of the fixed bright spot is determined by center generator 7.
1, when the digital value added from the main counter 67 becomes [128J, the width C of the fixed bright spot is given by the switch 74.

The position and width of the bright spot in the vertical direction are determined by the same principle as in the horizontal direction, but the pulse for this purpose is multiplied by 1.25 times the horizontal synchronizing pulse by the multi-circuit 70.

The reason for this is that the number of scanning lines in the l field is 262.5, but the top 27 are used as margins and the bottom 40 are used as bright lines, so the number of lines that can be used as an effective screen is about 200, which is 8-bit. The maximum number [256I is insufficient, so 1
．． This is to multiply the number by 25 to make it a number close to 256.

The operations of the delay counter 69, main counter 68, comparator 55, switch 58, fixed bright spot center generator 72, and switch 75 are the same as those of the horizontal parts 65, 67° 54, 57, 71, and 74, and the moving bright spot The height b of the dot and the height d of the fixed bright spot are determined.

The outputs of the center generators 71 and 72 for fixed bright spots in the horizontal and vertical directions are applied to the antenna door 8, so when the output of the antenna door 8 is turned on, both the horizontal and vertical directions are turned on. Since this is the case, a rectangular bright spot is produced.

Similarly, the outputs of comparators 54 and 55 are applied to antagonal door 9, resulting in a rectangular moving bright spot.

The field strength level sample and hold circuit 50 has an amplifying effect, and at the normal maximum input level (300 mV), I
This is so that the output of OV can be obtained.

The length of the bright line is determined by using the output of the main counter 67 used to determine the horizontal position of the bright spot, and by using the comparator 56.
It is determined by comparing with the output digital value of the A/D converter 53.

The switch 59 is used to set the length of the bright line at maximum input.

The length of the bright line is controlled by a flip-flop circuit 77, and the start is started by a horizontal synchronizing signal,
It is reset by turning on the output of 6.

The position of the bright line is at the bottom of the screen, and the width is 40 scanning lines, so the center position is the 424th line (just rub it). The width can be determined.

A flip-flop 77 outputs a signal representing the horizontal length of the bright line, and a purge generator 73 outputs a signal representing the width of the bright line.
Since the output of is added to the ant gate 80,
A bright line with a width of 40 scanning lines is generated at the bottom of the screen.

ΔAZ (DC) and ΔEL. (DC) When the signal exceeds ±5 V or when the field strength level exceeds the maximum value, the output of A/D converters 51, 52, and 53 is 256 V.
Since the moving bright spot is fixed at the periphery of the effective screen, the bright line remains at the maximum value.

At this time, overflow detectors 60, 61 and 62
turns on, and the overflow outputs of ΔAZ(DC) and ΔEL(DC) pass through the OR gate 81 to the NAND gate.
The field strength level overflow output is applied to ant gate 84.

On the other hand, since a flash signal obtained by dividing the frequency of the vertical synchronizing signal by a frequency divider 87 is applied to gates 82 and 84, the output thereof blinks, and this blinking output is the output of a moving bright spot. Since it is applied to the gate 83 and the bright line output gate 85, the moving bright spot and bright spot flash.

The fixed bright spot, moving bright spot, and bright line outputs are mixed by an OR gate 86, adjusted to an appropriate amplitude by an amplitude adjuster 88, and then mixed with a video signal through a buffer amplifier 89.

The video signal passes through a buffer amplifier 90, is adjusted to an appropriate amplitude by an amplitude adjuster 91, is mixed with bright spot and bright line signals, and is outputted from a tracking receiver via an amplifier 93.

The output of the tracking receiver is applied to the OR, T monitor 4.

The OR,T monitor 4 inputs a video signal and displays an image on a CRT, and is made small and lightweight.

The television receiver 5 is small and lightweight, easy to handle, and manufactured so that it can be used outdoors.

The input signals to the television receiving device 5 are ΔAZ and Δ
One horn antenna 12 provided at the center of the four horn antennas whose EL is to be determined is used and connected by a coaxial cable.

The embodiments described above are suitable for manual operation, and have the advantage of being simple in construction, inexpensive, and convenient to transport, but on the other hand, it is difficult to track fast-moving mobile stations such as helicopters. Furthermore, if it is necessary to establish a base station for a long period of time, or if there is wind or rain, it may be difficult to use the base station outdoors.

In such a case, a remote control method as shown in FIG. 9 can be adopted.

In this method, an electrically controlled rotating device 94 is installed in place of the tripod head, and this control line and monitor cable 95 are led indoors, and the remote controller 96 can be operated while monitoring the monitor 4 indoors. You can perform tracking by

Tracking can also be performed completely automatically.

In this case, tracking may be performed by a servo mechanism, and in FIG. 9, the rotating device 94 is made suitable for a servo mechanism, ΔAZ (DC) and ΔEL (DC) are connected to the servo circuit, and the rotating device is controlled by the output. Just do it like this.

In this case, in order to orient the tracking device almost in the direction of the mobile station and bring it within the retraction angle where automatic tracking is possible, a remote control system as shown in FIG. 9 can be used in combination.

The azimuth angle and the elevation angle can also be adjusted mechanically, for example, from within the relay vehicle.

Possible methods for this include changing the azimuth angle by rotating the entire column and changing the elevation angle by a gear device.

Although the above description relates to a tracking device suitable for mobile base stations, the advantages of the present invention can also be utilized in fixed base stations.

In this case, an automatic tracking method is often used, but since it is lightweight and small, the support can be simple and the construction cost can be low.

As described above, according to the display device of the present invention, it is possible to accurately and quickly direct the antenna to the correct radio wave arrival direction while observing the television image and tracking information that are superimposed and displayed on the same monitor screen. At the same time, the configuration of the display device is simple, compact, and lightweight, making it possible to provide a small, lightweight, and easy-to-operate tracking device at a low price. The availability of tracking base stations has had a truly significant effect on mobile broadcasting of television.

The present invention is not limited to the embodiments described above, and various changes and modifications can be made.

For example, the ΔAZ(DC) and ΔEL(DC) signals output from the tracking receiver shown in FIGS. 1 to 5 described above may be supplied to a normal display device different from the display device shown in FIG. The azimuth angle and elevation error can also be displayed.

The display device shown in FIG. 7 also shows ΔAZ output from a tracking receiver different from the tracking receivers shown in FIGS. 1 to 5.
and ΔEL signals can also be input.

[Brief explanation of the drawing]

Fig. 1 is an external view showing the configuration of an example of a tracking device equipped with a display device according to the present invention, and Fig. 2 is a rat race circuit using a micro-S-IJ tube line used in the tracking device shown in Fig. 1. Figure 3 is a diagram showing the configuration of a tracking receiver input circuit when two sets of two horn antennas are placed at the same interval horizontally, and Figure 4 is a diagram showing the configuration of two horn antennas. System diagram up to the tracking receiver input circuit when the horn antenna is placed horizontally and the other two horn antennas are placed vertically, 5th
6 is a waveform diagram of each part of the receiving circuit, FIG. 7 is a system diagram showing the configuration of an example of a display device according to the present invention, and FIG. 8 is a system diagram of a stage after the input circuit of the receiving circuit. FIG. 9, which is an explanatory view of the display on the OR and T planes, is a diagram showing the configuration of a remote-controlled tracking device. 1... Parabolic reflector, 2... Multi-horn antenna mount, 3... Tracking receiver, 4
...OR, T monitor, 5...television receiver, 6...board, 7...
Pan head, 8-11...Horn antenna for angle detection,
12... Horn antenna for video reception, 13...
... Horn antenna cover, 14-17 ... Horn antenna feeder line, 18-21, 23-25° 29.3
1...Hybrid circuit, 22,26°30.
32...Pseudo load, 33...Microwave bandpass wave generator, 34...Mixer, 35...
...Local oscillator, 36, 38...Intermediate frequency amplifier, 37...Intermediate frequency amplifier, 39...
... AGO circuit, 40 ... Switching signal generation circuit, 41 ... Detector, 42.43 ...
. . . Demodulator, 44, 45 . . . Amplifier, 46.
47...Low pass offshore wave device, 48,49,50・
...Sample and hold circuit, 51, 52, 53.
...A/D converter, 54, 55, 56...
・Comparator, 57, 58, 59...Length setting switch, 60.61, 62...Overflow detector, 63...Sync signal separator,
84...Pulse generator, 65.69...
・Delay counter, 66...and gate,
67.68... Main counter, 10...
...Multi circuit, 71, 72... Center generator, 73... Bar generator, 74.75, 76... Length setting switch, 7
7...Flip-flop circuit, 78, 79, 8
0...And gate, 81...Or gate, 82...Nando game-1, 83, 85,
85...AND gate, 86...OR gate, 87...Frequency divider, 88...Amplitude adjuster, 89,90... Buffer amplifier, 9
1゜92...Amplitude adjuster, 93...Amplifier, 94...Electric control rotation device, 95...
...Monitor cable and control line, 96...
controller.

Claims (1)

[Scope of Claims] 1. A multi-horn antenna that receives television radio waves emitted from a television radio wave generation source to be tracked, and this multi-horn antenna is mounted, and the main axis of the multi-horn antenna is directed toward the arrival of television radio waves. A tracking device comprising a support member rotatably arranged so as to be able to point in any direction, and a circuit for processing the output of the multi-horn antenna to generate tracking information, using a cathode ray tube as a display means, A display device for a tracking device, characterized in that the tracking information and the received television video signal are simultaneously displayed on the screen surface of the cathode ray tube. 2. As the tracking information, a DC voltage representing an azimuth angle error and an elevation angle error between the main axis of the multi-horn antenna and the direction of arrival of the television radio wave is received, and movement is performed on the cathode ray tube screen surface in accordance with these DC voltages. means for projecting a bright spot; and means for projecting a fixed bright spot at a predetermined position on the cathode ray tube screen surface; 2. A display device for a tracking device according to claim 1, wherein the moving bright spot overlaps the fixed bright spot. 3. A patent characterized in that the tracking information includes means for receiving a DC voltage representing the electric field strength of an incoming radio wave and projecting a bright line having a length corresponding to the DC voltage on the screen surface of the cathode ray tube. A display device for a tracking device according to claim 1 or 2.