Basic Info.
Frequency Range
1575.42MHz+/-1.023MHz
Type
Function Signal Generator
Product Description
Multi-output navigation signal simulator (GNS8470)
Keywords: multi-output, multi-channel, CRPA anti-interference test, darkroom test
GNS8470 multi-output simulator is developed for anti-interference technology of controllable receive mode antenna (CRPA), receiver anti-interference The powerful multi-output multi-channel analog source introduced by performance testing and other applications has the multi-output channel simulation function, and each frequency point has the independent output function of a single satellite signal.
GNS8470 has the satellite navigation signal analog output capability of BDS constellation (36 RNSS), GPS constellation (32), GLONASS constellation (24), Galileo constellation (24) and its mixed constellation, providing standard 1PPS pulse with high stability Signal and 10MHz clock signal output. Each board has 8 independent output channels, supports 8 single star independent outputs, a single machine can be configured with 88 independent output channels, can support 88 single star independent outputs, and each channel output satellite can be configured.
The GNS8470 multi-output simulator is a complete constellation simulator. The user can fully control the definition of the satellite orbit, including the movement of the simulated satellite relative to the simulated position, date and time specified by the user.
By installing antenna devices in the anechoic chamber and connecting multiple transmitting antennas, the GNS8470 multi-output simulator can create a simulated actual environment for testing the entire CRPA system including the antenna devices. The GNS8470 multi-output simulator can be integrated with multi-device phase shifters or delay matrices to generate RF wavefronts on multiple analog antenna devices to test CRPA control devices. The GNS8470 multi-output simulator can use reflectors and signal attenuators to simulate the environment and test the actual performance of the antenna in the microwave anechoic chamber, thus meeting the requirements of radiation testing.
Features
1) BD3 signal simulation Support Beidou No. 3 public frequency point and authorized frequency point (B1C, B2a, B1A and other frequency points) signal output, support Beidou global satellite simulation.
2) Constellation simulation Can complete satellite orbit simulation, satellite clock difference simulation, delay differential TGD simulation of BDS / GPS / GLONASS / Galileo and other constellations. It can simulate and generate satellite orbits, observation data and navigation messages of BDS constellation (36), GPS constellation (32), GLONASS constellation (24), Galileo constellation (24) and its mixed constellation, and can simulate the carrier movement process Changes in satellite signal strength, etc.
3) Trajectory simulation It has the ability to generate static and dynamic trajectories. It can simulate the motion characteristics of static and dynamic carriers and generate user trajectories. At the same time, it can simulate special motion trajectories such as circles and spirals. With special scene simulation function, it can simulate and generate special scenes with fixed pseudorange, fixed speed and fixed acceleration.
4) Environmental simulation can simulate the influence of various error sources on navigation signals in the propagation of navigation signals in the atmosphere, and can turn on and off the influence of error sources, including ionospheric delay, tropospheric delay and atmospheric parameters (temperature, humidity, air pressure, etc.) , And the double-atmosphere effect caused by satellite signals from the far-Earth side crossing the atmosphere twice.
5) Abnormal simulation can simulate the failure of each satellite navigation system, including signal loss/interruption, pseudorange or carrier and power abnormality. Users can set satellite integrity parameters, including: satellite health word, URA, regional user distance accuracy index ( RURAI) etc.
6) Simulation control The simulation time, static carrier trajectory, dynamic carrier trajectory, special carrier trajectory and other parameters can be configured through the human-computer interaction interface, and external input trajectory files can be specified. Able to set parameters such as pseudorange and power of each channel, and can set ionospheric delay, tropospheric delay and atmospheric parameters (temperature, humidity, air pressure, etc.). It has the functions of observation data and navigation message recording and output, and has the script editing ability of pseudo-range and power jump gradient.
7) Test and evaluation It has the functions of real-time evaluation, process scripting, batch automated testing and automatic report generation. Tests such as positioning accuracy, speed measurement accuracy, ranging accuracy, consistency test, and bit error rate can be completed.
8) Other features Can be synchronously interconnected with multiple systems to build a large and complex simulation test platform. 27
28 Adopt modular design, with good openness, scalability and compatibility. Using standard VXI bus architecture with excellent electromagnetic compatibility environment, the system has high reliability and good maintainability.
Parameter index
(1) Output frequency Multiple frequency points can be selected at will.
(2) Signal scale Number of channels: Each port supports 1~12 channels of output
(3) Signal accuracy Pseudorange phase control accuracy: Better than 0.001m (design) Better than 0.05m (actual measurement) Pseudorange change rate accuracy: Better than 0.001m/s (design) Better than 0.005m/s (measured) Channel-to-channel consistency: 0.3ns
(4) Signal quality Phase noise: -75dBc/Hz 100 Hz; -80dBc/Hz 1k Hz;- 85dBc/Hz 10k Hz; -90dBc/Hz 100k Hz Harmonic power (MAX): -40dBc Clutter power (MAX): -50dBc
(5) Signal power Power range: -150dBm~-60dBm (optional power Control unit) Power resolution: better than 0.2dB Power accuracy: better than 0.7dB
(6) Dynamic range Speed: 0~120000m/s; Acceleration: 0~8000m/s2; Acceleration: 0~ 80000m/s3;
(7) External interface Reference 1PPS pulse signal (BNC type head): input and output 1 each Reference 10MHz clock signal (BNC type head): input and output 1 each RF output port (SMA type Head): 1~88 independent outputs
(8) Clock stability Second stability: ≤ 5×10-11 Day stability: ≤ ±5×10-10
(9) External reference input 1PPS pulse signal: 1 way 10MHz clock signal: 1 channel
(10) standard reference output 1PPS pulse signal: 1 channel 10MHz clock signal: 1 channel Requires multiple output, optional time-frequency unit.
(11) Output second pulse index Output level: LVTTL Rising edge stability: 0.1ns High level duration: greater than 20ms
(12) Reliability index MTBF:> 2000 hours MTTR: <2 hours MLDT :< 24 hours
(13) Working environment Working temperature: -10ºC- +55ºC Humidity: 10%~75% (22C), ≥90% (45ºC)
(14) Storage and transportation Impact: ≤9g/s Vibration: ≤0.1g/(10Hz~100Hz) Humidity: ≤98% Storage temperature: -45C~+75C
(15) Power supply AC voltage 200v-250v, frequency (50 ±10) Hz, DC ripple ≤3% Automatic protection when power supply is abnormal
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