20
OEM6 Family Installation and Operation User Manual Rev 7
Chapter 1
Introduction
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
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 2, Voltage Input Requirement for OEM6 Family Cards
and
and
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
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
for details.
1.4
OEM6 Enclosure
The OEM628 is also housed in an enclosure to provide a complete receiver solution.
The FlexPak6 enclosure offers protection against environmental conditions, in addition to the easy to use
interface to the card’s data, power and status signals.
615
An external LNA power supply is required for the OEM615 and OEM617D cards.
617D
615
The OEM615 and OEM617D do not offer external oscillator capabilities.
617D
638
