Recently, the SYN5203 GPS signal simulator developed by our company has been put into use in a research institute, which provides a strong basic system guarantee for the relevant test projects.

The functions and technical requirements of this research institute for GPS satellite signal simulator are as follows:

Under the scenario of satellite signal simulator, the test equipment can work normally. Due to some special needs, the receiving equipment of the Institute is in a closed space and can not receive real signals, resulting in failure to work normally. Therefore, after simulating the satellite signal, the eight devices can communicate with each other.

Analog signals must be transmitted directly to the receiving device through direct connections, so as to avoid interference of wireless signals to other machines.

Technology demand:

1, to generate GNSS time (basic needs)

2, able to simulate standard NMEA data.

3, you can record the track in real time, or you can use the software hand drawn trace. Static and dynamic support

4, direct connection can be used for more than one pair.

5. When the signal intensity is strongest, the radiation range should not be less than 5m

6. Portable device with built-in lithium battery can stand for at least 1 hours.

7, you can preset multiple tracks, and the dynamic trajectory can set parameters such as speed, acceleration and acceleration.

8, with micro power transmitter function, direct connection receiver test.

According to the needs of users and the function of our products, the design of this project is to use our SYN5203 GPS signal simulator and SYN2302D GPS receiver to match the signal power divider SYN5008G type signal distributor.Among them, SYN5203 is the main host device, and the receiver mainly needs to record a static or dynamic trajectory in real time. The SYN5008G signal distributor is designed to meet the demand of one to many direct connection and carry out signal branch transmission.

As shown in the diagram, the interface of the broadcasting signal of the satellite signal simulator is SMA, and the input interface of the distributor is BNC, and the middle is connected by a SMA to BNC cable. The distributor is divided into eight points, one way into eight roads, and the eight output interface is also SMA. The interface of the device is not SMA, and 8 transfer lines are connected directly.

In order to prevent the signal intensity from being too large, we need the signal attenuator to connect the simulator output interface when the direct connection signal is weak. This solves the problem that the signal is too strong to interfere with other peripheral work.

In the process of use, the main demand is to simulate the satellite signal, basically do not need real-time recording module, because we have already built more than ten track tracks in the factory, and there are Xi'an, Beijing and other static and dynamic developments. Just connect the cable and click on a loop to send it. The equipment we provide has a single track transmission and a circular track.

After clicking the single / circular play, wait a few seconds to more than ten seconds. 2 command windows will be popped up, one is the timing command window, and the other is the command window for the signal. When there are 2 windows, please do not click on the black part, only allow the title bar to drag. If touched, the analog signal will stop sending.

Single playback track: play track only once.

Loop play track: repeat playing track.

Stop playing track: stop the current playing track, click the stop track button, then manually turn off the signal and launch the command window.

The SYN5203 satellite signal simulator produces a true GPS signal, which can output all the statements of the receiver, and the receiver is unable to distinguish the simulated satellite signals and the real signals. It is necessary to note that some of the receiving devices are saved by ephemeris. When receiving the simulator signals, there must be a priority order, so that the simulator can run first and then turn on all the receiving devices.

SYN5203 is widely used in various scientific research projects, such as UAV flight test, nautical instrument test, indoor tachometer, vehicle navigation intercommunication, vehicle line test, driving school GPS simulator and other needs. If there is intention to communicate with the relevant business people,

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