Introduction
Chapter 1
OEM6 Family Installation and Operation User Manual Rev 12
25
1.3.3
GNSS Antenna
The antenna converts electromagnetic signals transmitted by GNSS satellites into electrical signals that can
be used by the receiver. An active GNSS antenna is normally required for optimal receiver performance.
NovAtel’s active GNSS antennas provide precise phase centers and robust enclosures (refer to our web site
).
Optional LNA Power Supply
The receiver can supply power for the antenna LNA. If the antenna is not compatible with the OEM6 power
supply, an external LNA supply may be required. See
on page 77 for more information.
1.3.4
Power Supply
A power supply capable of delivering the minimum receiver operating voltage and power is required. See
Table 3, Voltage Input Requirement for OEM6 Family Cards
Appendix C, OEM617D Technical Specifications
OEM628 Technical Specifications
Appendix E, OEM638 Technical Specifications
page 162 for details.
1.3.5
Optional External Frequency Reference
When applications require greater precision than the OEM628 or OEM638 internal clock, connect the
OEM628 or OEM638 to an external high stability oscillator. See
on page 76 for more
information.
1.3.6
Data Communications Equipment
A computer or other data communications device is necessary to communicate with the receiver and to
receive and store the data that the receiver provides.
1.3.7
Onboard Memory
The OEM638 has 4 gigabytes of onboard memory for data logging. Refer to
on page 78 for details.
An external LNA power supply is required for the OEM615, OEM617 and OEM617D cards.
The OEM615, OEM617 and OEM617D do not offer external oscillator capabilities.
