GNSS-750
ANTENNA GUIDE
OM-20000120
Rev 4
September 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:
•
•
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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
antenna1
Accessories
Additional available accessories include the following:
•
A radome (NovAtel part number 01018195)
SITE SELECTION GUIDELINES
For optimal performance, select a site that meets the following conditions before installing:
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•
•
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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SPECIFICATIONS
RF
3 dB pass band (typical)
Upper:1525-1612 MHz
Lower:1164-1301 MHz
Out-of-band rejection (typical)
0 900
900 1002.5 MHz
1002.5 1062.5 MHz
1062.5 1102.5 MHz
1370 1465 MHz
1410 1440 MHz
1668 1718.5 MHz
1718.5 1798.5 MHz
1798.5 1900 MHz
1900 3000 MHz
80 dB
70 dB
50 dB
30 dB
30 dB
50 dB
30 dB
50 dB
70 dB
80 dB
Gain at zenith (= 90°) (min)
+5 dBic
Gain roll-off (zenith to horizon)
10-15 dB
LNA gain (typical)
39 3 dB
Polarization
Right-hand circular
Noise figure (typical)
1.5 dB
Differential propagation delay
(maximum)
9 ns
Nominal impedance
50 
VSWR
1.5 : 1
POWER
Input voltage
3.3 - 12 V
Current (typical)
70 mA
PHYSICAL
Diameter
380 mm (14.96")
Weight
7.6 kg (317.47 oz)
Height
200 mm (7.48”)
ENVIRONMENTAL
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Operating temperature
-55°C to +85°C (-67°F to
Storage temperature
-55°C to +90°C (-67°F to
Salt spray
MIL-STD-810F Method 509.4
Ingress protection
IPX6 and IPX7
MECHANICAL DRAWINGS
All dimensions are in millimetres (mm) where 1 inch = 25.4 mm.
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PHASE CENTER
Please see the , Mechanical Drawings section on the previous panel and the close up of the label below
before reading this section.
Model Name
For absolute offset numbers and to download PCV (Phase Center offsets and Variations) tables, please
visit the GEO++ Web site at www.geopp.com.
When using the Web site mentioned above, look for the NovAtel listing of your antenna model and its hardware revision.

Only integer hardware revisions affect the phase center offsets. For example, the numbers given for
hardware revision 2.02 are applicable to an antenna labelled H/W Rev: 2.00, 2.05, 2.12 and so on.
Table 1 shows typical absolute and relative offset numbers for the current 750 antenna model.
Table 1: Height
Absolute (GEO++) with Radome
Absolute (GEO++) without Radome
170 mm
157 mm
162 mm
159 mm
L1
L2
If you need any further advice on this matter, please visit our Web site at www.novatel.com. Other methods
of contacting Customer Support can be found on the last panel of this guide.
Warranty Policy
NovAtel Inc. warrants that its Global Positioning System (GPS) products are free from defects in materials
and workmanship, subject to the conditions set forth below, for the following periods of time:
GPSAntenna™ Modules:One (1) Year
Cables and Accessories:Ninety (90) Days
Date of sale shall mean the date of the invoice to the original customer for the product. NovAtel's responsibility respecting this warranty is limited solely to product repair at an authorized NovAtel location only.
Determination of repair will be made by NovAtel personnel or by
technical personnel expressly authorized by NovAtel for this purpose.
The foregoing warranties do not extend to
(i) nonconformities, defects or errors in the products due to accident, abuse, misuse or negligent use of the
products or use in other than a normal and customary manner, environmental conditions not conforming to
NovAtel’s specifications, or failure to follow prescribed installation, operating and maintenance procedures,
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(ii) defects, errors or nonconformities in the products due to modifications, alterations, additions or changes
not made in accordance with NovAtel’s specifications or authorized by NovAtel, (iii) normal wear and tear,
(iv) damage cause by force of nature or act of any third person, (v) shipping damage; or (vi)service or
repair of product by the dealer without prior written consent from NovAtel.
In addition, the foregoing warranties shall not apply to products designated by NovAtel as beta site test
samples, experimental, developmental, preproduction, sample, incomplete or out of specification products
or to returned products if the original identification marks have been removed or altered.
The warranties and remedies are exclusive and all other warranties, express or implied, written or oral,
including the implied warranties of merchantability or fitness for any particular purpose are excluded.
NovAtel shall not be liable for any loss, damage or expense arising directly or indirectly out of the
purchase, installation, operation, use or licensing or products or services. In no event shall NovAtel be
liable for special, indirect, incidental or consequential damages of any kind or nature due to any cause.
There are no user-serviceable parts in the GPS Antenna and no maintenance is required. If the unit is
faulty, replace with another unit and return the faulty unit to NovAtel Inc. You must obtain a RETURN
MATERIAL AUTHORIZATION (RMA) number by calling NovAtel Customer Support at 1-800-NOVATEL
(U.S. and Canada only) or 403-295-4900 before shipping any product to NovAtel or a dealer. Once you
have obtained an RMA number, you will be advised of proper shipping procedures to return any defective
product. When returning any product to NovAtel, please return the defective product in the original packaging to avoid damage.

Before shipping any material to NovAtel or Dealer, please obtain a Return Material Authorization (RMA)
number from the point of purchase or NovAtel’s Customer Support.
WEEE Notice
If you purchased your GNSS-750 in Europe, please return it to your dealer or supplier at the end of its life.
The objectives of the European Community's environment policy are, in particular, to preserve, protect and
improve the quality of the environment, protect human health and utilise natural resources prudently and
rationally. Sustainable development advocates the reduction of wasteful consumption of natural resources
and the prevention of pollution. Waste electrical and electronic equipment (WEEE) is a regulated area.
Where the generation of waste cannot be avoided, it should be reused or recovered for its material or
energy. WEEE products may be recognized by their wheeled bin label.
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Questions or Comments
If you have any questions or comments regarding your GNSS-750, please contact NovAtel Customer
Support using one of methods provided below.
E-mail: support@novatel.com
Web: www.novatel.com
Phone: 1-800-NOVATEL (International) or 403-295-4900 (U.S. & Canada)
Fax: 403-295-4901
© Copyright 2012 NovAtel Inc. All rights reserved.
Unpublished rights reserved under international copyright laws.
Recyclable
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