User's Manual Part 1

52 OEMV Family Installation and Operation User Manual Rev 5B
Chapter 3 Installation and Set Up
The OEMV family receivers and their LNA capabilities are listed in this section.
OEMV-3
For the OEMV-3 it is possible to supply power to the LNA of an active antenna either from the
antenna port of the OEMV-3 card itself or from an external source. The internal antenna power supply
of the OEMV-3 cards can produce +4.75 to +5.10 V DC at up to 100 mA; enough for NovAtel’s dual-
frequency GNSS antennas, so that an additional LNA power supply is not normally required.
If a different antenna is used whose LNA requires voltage capacity beyond what the receiver can
produce, then the external LNA power option must be utilized. This simply requires setting an
external voltage supply between +5.5 and +18 V DC, 100 mA maximum, and connecting it to pin 40
of the 40-pin connector on the OEMV-3. See also Appendix A, OEMV-3, LNA_PWR on Page 154.
In either case, the LNA power is fed to the antenna through the same coaxial cable used for the RF
signals (LNA power is enabled by default). The internal LNA power source should be disabled using
the ANTENNAPOWER command.
OEMV-2
The OEMV-2 card supplies power to the active antenna LNA from its internal LNA supply only.
OEMV-1 and OEMV-1G
The OEMV-1 and OEMV-1G cards use external LNA power only. Set the external voltage supply
between +5.5 and +16 V DC and connect it to pin 1 of the OEMV-1, or OEMV-1G, 20-pin connector.
See also Appendix A, OEMV-1, RF Input / LNA Power Output on Page 131 or OEMV-1G, Page 137.
CAUTION NovAtel guarantees performance specifications only using NovAtel antennas.
3.3.8 DL-V3 Removable Compact Flash Memory Card
Data commands and logs can be recorded from the DL-V3 to a removable Compact Flash (CF) card.
The need for a companion handheld data logger is avoided when continuous user interaction is not
required, since the DL-V3 is capable of logging data according to pre-configured parameters without
any user intervention. In applications when continuous user interaction is required, a simple handheld
controller can be used with the DL-V3, as the controller does not require its own data logging
memory. The reduced handheld data logger or controller requirement simplifies your system and
reduce its total cost and power consumption. By default only a log group named default exists. A
powerup group must be created to take advantage of the automatic functionality, refer to the DL-V3
Firmware Reference Manual for more information.
WARNING: To minimize the possibility of damage, always keep the CF card cover closed and
latched except when exchanging CF cards. Do not change the card while
logging is in progress. Data will be lost. It is not necessary to turn the receiver
off before inserting or extracting a CF card if you are not logging data.