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OEM6 Family Installation and Operation User Manual Rev 7
Chapter 4
Operation OEM6 Cards and Enclosure
4.7.4
Status Indicator
OEM6 family receiver cards have an LED indicator to provide receiver status.
The LED blinks green on and off, approximately once per second, to indicate normal operation. If the
indicator is red, the receiver is not working properly. The indicator’s operation is described in
4.7.5
External Oscillator
For applications requiring greater precision than what is possible using the on-board Voltage Controlled,
Temperature Compensated Crystal Oscillator (VCTCXO), the OEM628 or OEM638 may need to be
connected to an external, high stability oscillator, at 5 MHz or 10 MHz.
Connect a cable from the external oscillator to the receiver’s external oscillator input connector. For the
OEM628 and OEM638, a MMCX female connector (J101) is used as shown in
The receiver does not have to be powered down during this operation. However, if handling a card
directly, observe anti-static practices. The OEM628 and OEM638 input impedance is 50 ohms.
When the external oscillator is installed, use the
EXTERNALCLOCK
command (refer to the
(OM-20000129) for details) to set the clock type (e.g: cesium, rubidium or
ovenized crystal) and frequency.
4.7.6
Antenna LNA Power
NovAtel antennas and coaxial cables meet receiver RF input gain requirements. NovAtel antennas are
equipped with built-in LNAs that provide 26 dB of gain to the satellite signal received. The power to the
antenna LNA is provided through the receiver’s RF port center conductor. To achieve the required input
gain to the receiver, NovAtel coaxial cables are designed to introduce no more than 10 dB loss. Antenna
supply over current protection limits the LNA power.
638
A number of pins on the OEM638 card can have multiple functions. Refer to the
IOCONFIG
,
EVENTINCONTROL
and
EVENTOUTCONTROL
commands in the
Family Firmware Reference Manual
(OM-20000129) for details.
Figure 8, OEM615 Connector and Indicator Locations
Figure 9, OEM617D Connectors and Indicators
Figure 10, OEM628 Connector and Indicator Locations
Figure 11, OEM638 Connector and Indicator Locations
FPk6
Refer to
Table 5, FlexPak6 Status Indicators and Connector Labels
for
FlexPak6 details.
615
617D
628
638
The OEM615, OEM617D and FlexPak6 do not have an external oscillator connection.
FPk6
617D
615