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18 SUPERSTAR II User Manual Rev 3
Chapter 2 Receiver Specifications
digital converter, a 16-bit system processor, memory, control and configuration logic, signal processing
circuitry, serial peripheral devices, and supporting circuitry.
The digital section performs the translations and calculations necessary to convert the IF analog signals into
usable position and status information. It also handles all I/O functions, including the auxiliary strobe signals,
which are described in detail in Section 3.4, Connectors and Connector Pins Assignment starting on Page 22.
For input and output levels please see Appendix A, Technical Specifications, starting on Page 44.
2.3 Enclosure and Wiring Harness
An enclosure is necessary to protect the GPSCard from environmental exposure and RF interference. If a
FlexPak-SSII is not being used as the enclosure, a wiring harness is also required to provide an interface to the
SUPERSTAR II’s antenna and power inputs as well as data and status signals.
2.4 GPS Antenna
The purpose of the GPS antenna is to convert the electromagnetic waves transmitted by the GPS satellites into
RF signals. An active or passive GPS antenna may be used in the operation of the receiver. NovAtel’s active
antennas are recommended.
2.4.1 Optional LNA Power Supply
Power for the antenna LNA is normally supplied by RF cable to J2, see also Section 3.4.3, RF Connector (J2)
starting on Page 23. However, if a different type of antenna is required that is incompatible with this supply,
connect an external power source to the receiver.
External LNA power is not possible with a FlexPak-SSII receiver.
2.5 Principal Power Supply
A single external power supply capable of delivering 5 V is necessary to operate the receiver. See Appendix A,
Technical Specifications, starting on Page 44 for details.
CAUTION: If the voltage supplied is below the minimum specification, the receiver will suspend
operation. If the voltage supplied is above the maximum specification, the receiver may
be permanently damaged, voiding your warranty.
2.6 Data Communications Equipment
A PC or other data communications equipment is necessary to communicate with the receiver and, if desired, to
store data generated by the receiver.