Satellite-Based Timing and Navigation System with SDR and Atomic Clock Synchronization
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Circuit Documentation
Summary
The circuit in question appears to be designed for communication and timing applications, featuring a satellite compass, a mini PC, GPS antennas, an atomic rubidium clock, and various power supply components. The circuit includes data transmission capabilities via USB and Ethernet, as well as precise timing functions provided by the atomic clock and GPS system. Power is supplied and regulated through a combination of AC filters, SMPS units, and DC jacks.
Component List
SI-TEX G1 Satellite Compass
- Power input (8 to 40VDC)
- Power ground
- Primary and secondary GPS port communication (RS-232, RS-422)
- 1 pulse per second (1 PPS) signal
Beelink MINI S12 N95
- Power input (100-240V AC, 50/60Hz, Output 12V/3A)
- USB3.2 Gen2 ports
- HDMI 2.0 4K@60Hz outputs
- Gigabit Ethernet NIC
TAE ANT
- SMA antenna output
XHTF1021 Atomic Rubidium Clock
- Lock indication
- Ground
- Communication ports (RXD, TXD)
- External power adjustment
- 1pps input/output
- Lock test
- DB-9 connector
5.5mm * 2.1mm DC Jack
- Positive pole
- Negative pole
- DC jack interface
SMPS_LRS-100-12
- AC input (Live, Neutral)
- Ground
- DC output (-V, +V)
Ettus USRP B200
- SMA connectors for TX/RX and GPS antenna
- External power input (5V DC)
- USB data and power
- 1PPS input
- 10MHz reference input
RF Directional Coupler
- Coupled port
- Output port
- Input port
AC Filter_CW10A
- AC input (Live, Neutral)
- Ground
Triple Output DC Power Supply
- 6V and 25V outputs with common ground
RS232 Splitter
- Multiple RS232 connection points
SMPS_9V_UP15S09
- AC input (Live, Neutral)
- Ground
- DC output (-V, +V)
1000BASE-T Media Converter MC220L
- SFP port
- 1000BASE-T Ethernet port
- Power input (9V/0.6A)
Terminal Block KTB1 20A 6P
- Multiple connection points for wiring
Duplex LC connector SFP-LX20
- Optic LC type single mode
- LAN connection
CASE
- Enclosure for components
Wiring Details
SI-TEX G1 Satellite Compass
- Power: Connected to the 25V + and 25V - outputs of the Triple Output DC Power Supply.
- 1 PPS: Connected to the RS232 Splitter (M6).
Beelink MINI S12 N95
- Power: Connected to a 5.5mm * 2.1mm DC Jack.
- USB 3: Connected to the USB3.0 port of the Ettus USRP B200 for data and power.
- LAN: Connected to the 1000BASE-T port of the 1000BASE-T Media Converter MC220L.
TAE ANT
- SMA Output: Connected to the output of the RF Directional Coupler.
XHTF1021 Atomic Rubidium Clock
- Ground: Connected to the -V of the SMPS_LRS-100-12.
- 1pps input: Connected to the RS232 Splitter (16).
- +12V: Connected to the +V of the SMPS_LRS-100-12.
Ettus USRP B200
- 1PPS: Connected to the 1pps output of the XHTF1021 Atomic Rubidium Clock.
- 10MHz Reference: Connected to the DB-9 of the XHTF1021 Atomic Rubidium Clock.
- GPS Antenna: Connected to the input of the RF Directional Coupler.
- Main Transmit/Receive: Connected to the coupled port of the RF Directional Coupler.
RF Directional Coupler
- Input: Connected to the SMA GPS Antenna port of the Ettus USRP B200.
- Output: Connected to the SMA ANT Output of the TAE ANT.
SMPS_LRS-100-12 and SMPS_9V_UP15S09
- AC Input: Connected to the AC Filter_CW10A.
- Ground: Connected to the AC Filter_CW10A and Terminal Block KTB1 20A 6P.
- DC Output: Connected to the respective DC Jacks and devices requiring power.
1000BASE-T Media Converter MC220L
- 1000BASE-T: Connected to the LAN port of the Beelink MINI S12 N95.
- SFP: Connected to the Duplex LC connector SFP-LX20.
Terminal Block KTB1 20A 6P
- Connections: Used for distributing AC and ground connections among the SMPS units and AC Filters.
Duplex LC connector SFP-LX20
- LAN: Connected to the SFP port of the 1000BASE-T Media Converter MC220L.
Code Documentation
No code was provided for any microcontrollers in the circuit. If there are any programmable devices within the circuit, their code is not included in this documentation and would need to be documented separately.