Transcript
an INWAVE AG brand
RSGPSPPS2 1PPS output GPS timing receiver The RSGPSPPS2 is a high performance timing receiver to supply 1PPS pulses to GPS guided frequency standards or other applications where an accurate 1PPS pulse is required. With it's easy to use RS232 and USB interface the user can manipulate the receiver characteristics and read important data. For timing applications the use of these interfaces is optional. The RSGPSPPS2 uses a dedicated timing GPS receiver to achieve the best possible performance.
Front view
Rear view
Benefits and Features: ●
compact, lightweight yet rigid construction using extruded aluminium enclosures
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highly accurate optimized GPS timing receiver
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firmware can be upgraded for GalileoL1 reception once the system is launched
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can be set for 3.3V or 5V active and passive GPS antenna
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open/short antenna detection (for active antenna)
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4 rear, 1 front buffered 1PPS outputs
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easy programming
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independent connectors for easy wiring
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low power consumption
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ideally suited for all timing solutions from RFSUISSE which require a 1PPS pulse
The RSGPSPPS2 is a GPS receiver dedicated to deliver the most accurate 1PPS signal possible in a small formfactor and low current design. Via the two interfaces, USB and RS232, the user can monitor all parameters of the GPS receiver and change the settings including location information to accelerate the acquisition. Page 1 of 8 © 2012, INWAVE AG, Dorf 23, CH9411 Reute, Switzerland Quality Made in Switzerland Rev. 1.2 30.11.2012
an INWAVE AG brand
Active and passive GPS antennas are supported, the selection is done with an internal jumper. Active antennas are preferred as they compensate for cable losses and increase the available signal strength. The unit is either powered from the controlling USB device or any 5VDC power source in case the RS232 interface is used.
Page 2 of 8 © 2012, INWAVE AG, Dorf 23, CH9411 Reute, Switzerland Quality Made in Switzerland Rev. 1.2 30.11.2012
an INWAVE AG brand RSGPSPPS2 Specifications
GPS receiver (ublox LEA6T): Receiver type : TimeToFirstFix1 :
Sensitivity3 :
Horizontal position accuracy4 : Accuracy of Timepulse signal:
Time Pulse: Max navigation update rate: Velocity accuracy6 : Heading accuracy7 : Dynamics: Operational limits8 :
50 Channels; GPS L1 frequency, C/A Code; GALILEO Open Service L1 frequency Cold Start (Autonomous): 29s Hot Start (Autonomous): 29s Warm Start (Autonomous): <1s 2 Aided Starts : <1 s Tracking & Navigation: 160 dBm Reacquisition: 160 dBm Cold Start (Autonomous): 144 dBm Autonomous: < 2.5 m SBAS: < 2.0 m RMS: 30ns 99%: <60 ns Compensated: 15 ns3, Configurable f = 0.25 … 999 Hz (Tp = 1/f – 1ms) <2Hz 0.1m/s 0.5 degrees <=4g Altitude 50000m Velocity 500m/s
All satellites at 130 dBm Dependent on aiding data connection speed and latency 3 Demonstrated with a good active antenna 4 CEP, 50%, 24 hours static, 130dBm, SEP: <3.5m 5 Quantization error information can be used to compensate the granularity related error of the time pulse signal. 6 50% @ 30 m/s 7 50% @ 30 m/s 8 Assuming Airborne <4g platform 1 2
Interfaces and supplies: RS232: RS232 connector: USB: USB connector: Antenna types: Active Antenna Supply: Antenna connector: Open/Short detection:
standard level interface, 9600Bd, 8N1 3.5mm coaxial 3pin connector. Tip = TXD, ring= RXD, case = GND USB version 2.0 FS (Full Speed, 12Mbit/s) miniUSB type B active and passive 3.3V and 5V, 80mA (max); enabled/set via jumper SMA female integrated Page 3 of 8 © 2012, INWAVE AG, Dorf 23, CH9411 Reute, Switzerland Quality Made in Switzerland Rev. 1.2 30.11.2012
Antenna recommendation: 1PPS outputs: 1PPS connector (front): 1PPS connector (rear): Power supply: General: Enclosure: Temperature range: Accessories (supplied): USB cable Wall power supply Accessories (optional): Active GPS antenna RS232 cable
an INWAVE AG brand Gain 1550dB, NF <=1.5dB (active antenna) 3.3V CMOS level SMB female 8pole terminal block, one signalground per channel (4) 5VDC/250mApeak via USB connector. Internal user exchangeable Libattery for backup.
anodized thick walled aluminium, 84*84.2*28mm (w/o connectors and flange) 35 to +85C (operational) 40 to +90C (storage)
USBA to miniUSBB cable RSPS5USB, 90 to 240VAC with USB connector. EU or US mains plug.
any active GPS antenna for 3.3V/50mA supply from small waterproof antennas, magnetic or nonmagnetic, up to commercial grade outdoor antennas. RSD9FA3.5, 3pin 3.5mm coaxial plug to 9pin Dsub female
Ex factory the GPS receiver is set for ~1:1 duty cycle of the 1PPS signal. This setting should never be changed as it impacts what cable length (capacitance) the output can drive. The receiver is also set for stationary use. The first time it is turned on it will take a lot longer to lock as it will precisely do location acquisition which is then stored in memory and be used from there on. This allows an accurate 1PPS output even with the reception of only one satellite. If the receiver shall be used in a mobile environment with changing locations it is better to switch to the mobile setting (variable location) via the control program.
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an INWAVE AG brand
Dimensions:
All RFSUISSE product comply with RoHS requirements current at the date of delivery. As we continuously improve our product we reserve the right to change published specifications without further notice. Please see our website at http://www.rfsuisse.ch for current information. All product manufactured and sold by INWAVE AG under the RFSUISSE brand is intended for laboratory use or are components (modules) not suitable for consumer use. Thus they are not required to and do not carry CE certification. Inquiries, quote requests and questions: please email to info@rfsuisse.ch or your INWAVE AG / RFSUISSE representative. For technical questions please email to tech@rfsuisse.ch RFSUISSE is a registered trademark of INWAVE AG, Reute, Switzerland
Page 5 of 8 © 2012, INWAVE AG, Dorf 23, CH9411 Reute, Switzerland Quality Made in Switzerland Rev. 1.2 30.11.2012
an INWAVE AG brand Programming Interface RSGPSPPS2
The RSGPSPPS2 can be programmed via USB and RS232 (9600Bd, 8N1). In case RS232 is used the unit has to be powered externally from a 5V supply via the USB connector. The latest revisions of programming software, USB drivers, firmware and operating instructions can be downloaded from the website of the GPS core manufacturer at http://www.ublox.com. Use the settings for the LEA6T module. Caution: do not change the duty cycle of the 1PPS signal as deviating from the factory set 1:1 cycle May impact the transmission over longer cables!
Connecting the rear 1PPS outputs Connecting wires to the rear 1PPS outputs requires opening the enclosure. Remove the two screws on each side of the enclosure and take off the center part of the body shell. Push the wires through the slot of the rear panel and connect them to the connector.
As the 1PPS is pretty uncritical low cost cables like telephone wire can be used to distribute the 1PPS signal. Return the center part of the shell back into its position and install the 4 screws back. Do NOT overtighten them!
Changing the internal Lithium backup battery Changing the internal 2032 size Lithium battery requires opening the enclosure. Remove the two screws on each side of the enclosure and take off the center part of the body shell. Carefully remove the old battery and replace it with a new 2032 size one, plus side upwards. Return the center part of the shell back into its position and install the 4 screws back. Do NOT overtighten them!
Changing the antenna type (active/passive) Changing the type of antenna requires opening the enclosure. Remove the two screws on each side of the enclosure and take off the center part of the body shell. Close to the SMA GPS antenna connector is a 3pin 2.54mm spacing jumper. For an 3.3V active antenna the jumper has to be over the “left” two pins of the header, for 5V it has to connect the “right” two pins whereas it should be removed for a passive antenna. In case of a passive antenna the power supply is disconnected as some passive antennas have a DC short circuit which would short the internal supply. If the passive antenna to be used doesn't have a DC short the jumper can be left in any active antenna position. Return the center part of the shell back into its position and install the 4 screws back. Do NOT overtighten them! Page 6 of 8 © 2012, INWAVE AG, Dorf 23, CH9411 Reute, Switzerland Quality Made in Switzerland Rev. 1.2 30.11.2012
an INWAVE AG brand
Page 7 of 8 © 2012, INWAVE AG, Dorf 23, CH9411 Reute, Switzerland Quality Made in Switzerland Rev. 1.2 30.11.2012
an INWAVE AG brand
RFSUISSE GPS receivers: Characteristic RS General purpose GPS receiver
GPSPPS1
GPSPPS2
GPSPPS3
GPSPPS4
GPSPPS5
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High performance GPS timing receiver ✓
Integrated 3.3V antenna supply Antenna supervisor
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RS232 control full level
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Optical RS232 ✓
USB control Dsub connector for supply, control and 1PPS Front SMB 1PPS output
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Rear 4way 1PPS output
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Rear optical 1PPS output (fibreoptic transmission)
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