Product profile
FT91S is a cost-effective frequency comparator, with a measurement range of 1-30MHz, and an additional frequency stability of 5×10-13 at 10MHz, which is suitable for the integration of large-scale frequency test systems, and together with BDSTAR TIME's automatic control board and test software, it can be used to form an automated frequency test system with several hundred channels. The module adopts BDSTAR TIME’s standard package, and the interface and commands are completely compatible with FT19.
Product feature
Background as low as 5×10-13/1S，3×10-15/1000S
Measured Input Frequency 1- 30MHz, Standard InputFrequency 10MHz
Quickly determine the measured frequency, and start the measurement automatically
Batch test systems can be formed with specific hardwareand software.
Typical curve 
External Dimension
DSUB9 Pin Definition： 1：The Ground 2：N/C 3：RS232-TX 4：RS232-RX 5：Locking Indication 6：Power supply: +12~+15V 7：N/C 8：The Ground 9：N/C  |
Application scenarios Technical Parameters  |
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Documentation
Being among experts, no longer confused.
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PNT stands for Positioning, Navigation, and Timing
![We are the Reference]()
Bd Star is a national high-tech enterprise specializing in Beidou GPS timing and navigation industry. The company is dedicated to the research and development, design, production, and sales of system solutions such as standard time timing
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Experienced
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BdSTAR TIME seamless switching technology for redundant reference sources includes several technical components such as high-precision phase-shifting technology, reference clock, FPGA, integrated analog stretching, asynchronous serial communication, parameter storage, and master clock output.
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Requirement customization
![Built-to-Order]()
The core technology team of the company has many years of research and development experience in the field of timing and frequency. They possess multiple key core technologies in high-precision timing, PNT combination, frequency measurement, control, optical fiber time-frequency transfer, recovery, and maintenance.
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Philosophy
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"Our team of experts is committed to providing you with the best industry solutions, reducing project costs, and saving your valuable time. Additionally, our ability to design and use various timing and navigation components enables us to develop customized products for various special applications."
