Novatel GNSS-750 User Manual
GNSS-750
ANTENNA GUIDE
OM-20000120 Rev 5 October 2012
The GNSS-750 is an active antenna designed to receive signals from the GPS, Galileo and GLONASS
satellites as well as L-Band signals. This antenna is designed to operate for GPS L1/L2/L2C/L5,
GLONASS L1/L2/L3 and L-Band frequency bands. The GNSS-750 is also designed to operate for Galileo
L1/E5a/E5b and E6 frequency bands and receives Compass B1/B2/B3. This guide provides the basic
information you need to install and begin using your new antenna.
Additional Equipment Required
The following equipment is required to set up the GNSS-750:
• A sturdy pillar or mount with a 5/8" x 11 thread that extends between 3/8" and 7/8" (9 mm and 22 mm)
• Coaxial cable with a male N connector
• A device with an antenna input port that both receives the RF signal and provides 3.3 to 12.0 VDC to the
antenna
Accessories
Additional available accessories include the following:
• A radome (NovAtel part number 01018195)
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SITE SELECTION GUIDELINES
For optimal performance, select a site that meets the following conditions before installing:
• An unobstructed as possible line-of-sight from horizon to horizon and at all bearings and elevation angles.
• As far as possible from reflective objects, especially those that are above the antenna and any water bodies,
which can be a strong source of multi-path reflections.
• If obstructions and reflective surfaces are within 30 m, ensure the site is as high as possible. Otherwise,
mount the antenna as low as possible.
1. Most NovAtel GNSS receivers provide the necessary power through their antenna RF connectors. Check
the applicable receiver user manual for details.
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INSTALLING THE ANTENNA
After a site has been selected, install the antenna as follows:
1. Verify that the thread on the mount does not extend more than 7/8" (22 mm) to ensure the antenna
receptacle is not damaged when the mount is inserted. If it extends further than 7/8" (22 mm), add two
jam nuts to shorten the exposed thread, ensuring the nuts are well tightened.
2. Align the mount thread with the metal adapter on the bottom of the antenna and rotate the antenna clockwise until it is securely screwed to the mount.
3. Remove the dust cap from the antenna’s connector.
4. If attaching a TNC coaxial cable, attach the male TNC connector to the antenna’s TNC connector.
If attaching a N connector coaxial cable, remove the N to TNC adaptor and attach the male N connector of the coaxial cable to the antenna’s N connector.
5. Attach the other end of the coaxial cable to the antenna input port of the receiving device, which must provide power as detailed in the , Specifications section of this guide.
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ANTENNA CARE
The GNSS-750 is designed to withstand the elements, including rain, snow, and dust. However, to ensure
your antenna performs optimally, keep the top surface and the choke rings of the antenna clean and brush
off any ice and snow. A radome is recommended. In addition, ensure the N connector remains clean and
dry and replace the dust cap when a cable is not connected.
ELEVATION GAIN PATTERNS
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