Ask for advice about satellite dish reception ?????

With 2 2 points, and 2 22k points, you can solve the problem.

This is simple, you mean that you want one TV to receive two satellite signals, right? You go and buy a 22K switch to connect the two high-frequency heads, and then set the 22K switch of the program parameters on the receiver to the "on" or "off" connection of your high-frequency head, so that you can receive two signals at the same time without interfering with each other, which is similar to a pot of multiple stars, but the signal is a little stronger. I wish you success.

Buy two two centimeters and two fours cut one.

After the signal comes out of the high-frequency head, it is connected to two centimeters first, and then it is connected to four to one.

The two cameras of a single high-frequency head can only watch the same polarized program at the same time, but in fact, the impact is not very great.

If you don't understand, you can continue to ask me.

You can use two ** modes to see it, connect different wires from each receiver General satellite receivers are attached with two ** wires (one is a connector at each end, and the other is two connectors at each end) so that you can connect two satellite receivers on the TV port.

However, when watching Asia 3S and Zhongxing 6B, you need to switch between **1 is one of the satellites, **2 is another satellite. There is no need for additional equipment.

That's sure to be possible!

Both TVs watch two star stations The current technology does require a double local shock high-frequency head And then separate it with 4 cuts Double local shock can bring more than 10 TVs are no problem My customers have asked me a lot of similar cost savings can not be a perfect solution.

The mouth of the satellite iron pot is mostly facing south.

Television satellites are both geosynchronous satellites, and the geosynchronous satellite is over the equator, which is stationary over the equator relative to the earth. From the ground, the satellite remains immovable, so it is also called a stationary satellite, and my country is in the northern hemisphere, and the satellite TV pot must point to the satellite, so the satellite pot is facing the south or south.

How the satellite pot works

Before the advent of cable TV and satellite pots, the most commonly used thing we used was antennas.

Older friends should have the impression that the antennas used back then were generally made of aluminum, which not only received limited signals, but also easily damaged. But the satellite hail Zheng pot that appeared later was different, and it was not only strong in signal reception, but also not easy to damage.

The signal reception range of ordinary antennas is limited, and only the signal waves emitted by the ground base station can be received, which is why the antennas installed in those years received a rather limited number of TV stations.

But the satellite pot is different, the satellite pot is a device that directly receives satellite signals, so its full name is also called satellite TV receiver. The satellite-synchronized signal covers almost all the country's TV stations, which is why you can easily see the national TV program by installing a "satellite pot".

There are many reasons why there is no signal. First, the satellite antenna (pot) is not aligned with the bearing, that is, the azimuth, elevation, and polarization angles are wrong. Second, the parameters of the satellite TV receiver are set incorrectly. Third, the high-frequency head or receiver or feeder is damaged.

Satellite antenna principle: Satellite TV receiving system is composed of: parabolic antenna, feed, high-frequency head, satellite receiver composed of a complete set of satellite receiving station.

1. The parabolic antenna is to reflect and converge the satellite signal energy of the starry sky into a focal point. 2. The feed is to set up a horn at the focus of the parabolic antenna that is afraid of satellite signals, which is called the feed, which means the source of feeding energy, and requires all the energy gathered to the focus to be collected. Feed-forward satellite receiving antennas are basically fed with large open angular ripples.

3. The high-frequency head (LNB, also known as the frequency reducer) is to reduce the frequency and amplify the satellite signal sent by the feed, and then transmit it to the satellite receiver. The lower the noise level of the high-frequency head, the better. 4. The satellite receiver demodulates the satellite signal transmitted by the high-frequency head, and demodulates the satellite TV image signal and sound signal.

The polarization of the satellite broadcast television signal. There are four types of polarization of satellite TV signals: right-handed circular polarization, left-handed circular polarization, vertical polarization, and horizontal polarization.

Since the first two polarizations are not commonly used, only the reception modes of vertical polarization (v) and horizontal linear polarization (h) are introduced. Vertically polarized and horizontally polarized receptions are directed by changing the direction of the rectangular (rectangular) waveguide of the feed to determine whether the reception is vertically or horizontally polarized. When the long side of the rectangular waveguide is parallel to the ground, it receives perpendicular polarization.

When perpendicular to the ground, it receives horizontal polarization. The direction of polarization (polarization angle) varies from place to place. Because the Earth is a sphere, the downward beam of the satellite signal travels horizontally and in a straight line, which causes different azimuths.

The same polarized signal received is different, so the polarization direction of the received signal is also different depending on the geographical location. The elongated waveguide port (direction of polarization) of the feed will not be exactly vertical or horizontal to the ground.

There are a lot of reasons.,If you want to figure out the principle, take a look at the forum article.,Upstairs also said a lot of azimuths.、Polarization angle、Elevation angle.,And the parameters should be set correctly.,Cables and so on.。。。

1. Principle: GPS receivers need to track multiple satellites in navigation and positioning work. For signals from different satellites, they must first be separated so that they can be processed and measured to obtain observations of the signals from different satellites.

The main function of the GPS receiver channel is to separate the received signals of different satellites, so as to realize the tracking, processing and measurement of each satellite signal.

The processing software in the receiver is to implement GPS positioning.

An important part of the automation of data acquisition and channel self-calibration detection, it is mainly used for signal capture, loop tracking, and point calculation. With the cooperation of the software in the machine, the microprocessor mainly completes the following calculations and data processing:

1) After the receiver is turned on, immediately instruct each channel to perform self-test, display their own self-test results in the video display window in a timely manner, and measure, correct and store the delay value of each channel.

2) After the receiver captures and tracks the satellite, it interprets the GPS satellite ephemeris according to the data code output by the tracking loop. When four satellites are locked at the same time, the three-dimensional position of the station is calculated together with the ephemeris of the C a code pseudorange observations, and the coordinates of the points are continuously updated (calculated) according to the preset position data update rate.

3) Calculate the lifting time, azimuth and altitude angle of all satellites in orbit with the measured point coordinates and GPS satellite almanac, and provide operators with the number of satellites in orbit and their working conditions, so as to select "healthy" and appropriately distributed positioning satellites to achieve the purpose of improving the accuracy of the points.

4) Receive the signals input by the user, such as station name, station number, antenna height and meteorological parameters.

Second, the type of receiver:

1) Multi-channel receiver, that is, a receiver with multiple satellite signal channels, and each channel only continuously tracks one satellite signal. Therefore, this kind of receiver is also called continuous tracking receiver, which is generally set up with 4-12 channels.

2) Sequential through-channel receivers, usually only have 1-2 channels. In order to track multiple satellite signals, it can track and measure each satellite signal sequentially under the control of the corresponding software. Because it takes a long time (>20ms) to measure a cycle of measured satellites, the tracking of satellite signals is discontinuous.

3) multiplexed channel receiver, similar to the sequential through-channel receiver, generally only has 1-2 channels, under the control of the corresponding software, the signal of all observation and measurement satellites is measured sequentially in sequence, and the difference between it and the sequential through-channel receiver is mainly the measured satellite signal.

The short time of one cycle (20ms) allows continuous tracking of satellite signals.

3. The type of antenna of the GPS receiver:

GPS satellites transmit carrier signals of two frequencies, namely the L1 carrier with frequency and the L2 carrier with frequency, their frequencies are 154 times and 120 times the basic frequency, respectively, and their wavelengths are and respectively. On L1 and L2, a variety of signals are modulated, and these signals mainly include:

C A. The C A code, also known as the coarse capture code, is modulated on the L1 carrier and is a 1MHz pseudo-random noise code (PRN code) with a code length of 1023 bits (period of 1ms). Since the C A code of each satellite is different, we often use their PRN numbers to distinguish them.

C A code is a major signal used by ordinary users to determine the distance between the station and the satellite.

P-code. The P-code, also known as the fine code, is modulated on the L1 and L2 carriers and is a 10MHz pseudo-random noise code with a period of seven days. When implementing AS, the P code and the W code are added to generate a confidential Y code, and at this time, the general user cannot use the P code to navigate and locate.

Navigational information. The navigation information is modulated on the L1 carrier with a signal frequency of 50 Hz, which contains the orbital parameters of the GPS satellite, the satellite clock correction and other system parameters. Users generally need to use this navigation information to calculate the position of GPS satellites in Earth orbit at a certain time, and navigation information is also known as broadcast ephemeris.