GNSS-302L-A

GM-14915158 Rev 3 February 2019

USER GUIDE

The GNSS-302L-A is an active GNSS antenna that receives the GPS L1 1575.42 MHz frequency,

GLONASS L1 1602 – 1606 MHz frequencies, GPS L2 1227.60 MHz frequency, GLONASS L2 1245 –

1260 MHz frequencies and L-Band 1525 – 1556 MHz frequencies.

This guide provides the basic information you need to install and begin using your new antenna.

ADDITIONAL EQUIPMENT REQUIRED

• A device with an antenna input port that both receives the RF signal and provides 3.8 - 6.0 VDC to

the antenna is required for the GNSS-302L-A. NovAtel GNSS receivers provide the necessary

power through their antenna RF connectors.

• Coaxial cable with a male TNC connector

INSTALLING THE ANTENNA

Both the input DC power and the output RF signal use a single coaxial cable connected to the antenna's

TNC female connector.

The antenna attaches to a surface with an ARINC-743 bolt pattern. Four screws pass through the antenna

housing.

To install the antenna:

1. Install the supplied o-ring into the groove on the antenna base.

2. Predrill the mounting holes and the connector clearance hole on the mounting surface. See the

Mechanical Drawings section for mounting pattern details.



The integrator of this antenna is responsible for ensuring antenna installation meets all the

overall integrated system requirements.



Refer to Section 307 of www.faa.gov/documentLibrary/media/Advisory_Circular/

AC%2043.13-2B.pdf for information about antenna bonding in aircraft applications.



User supplied o-ring grease can be used to hold the o-ring in the groove during

installation.

3. Use the four supplied mounting screws to attach the antenna to the mounting surface. The o-ring com-

presses and creates a seal between the surface and the antenna.

Ref. # Description

1 Antenna

2 Countersink screws

3 Mounting surface

4 O-ring

5 Pre-drilled mounting holes

4. Remove the dust cap from the antenna’s TNC connector.

5. Attach the coaxial cable’s male TNC connector to the antenna’s TNC connector.

Ref. # Description

1 Mounted antenna

2 Mounting surface

3 TNC connector

4 Coaxial cable



NovAtel recommends thread-locker (not included) on the mounting screws.

6. Attach the other end of the coaxial cable to the antenna input port on the receiving device. The

receiving device must be equipped to provide power as detailed in the SPECIFICATIONS section of

this guide. All NovAtel GNSS receivers provide the necessary power through the antenna RF

connectors.

This graphic provides examples of where the antenna may be located on an aircraft or vehicle (not to

scale).

ANTENNA CARE

The GNSS-302L-A is designed to withstand the elements, including rain, snow and dust. However, to

ensure that the antenna performs optimally, keep the radome clean and brush off any ice or snow. In addi-

tion, ensure the TNC connector remains clean and dry and replace the dust cap when a cable is not

connected.

SPECIFICATIONS

Band L1 GPS L2 GPS L1 GLONASS L2 GLONASS L-Band

3 dB pass band

(typical)

1575.42 ±15 MHz 1227.60 ±12 MHz 1609 ±7 MHz 1252.5 ±7.5 MHz 1542.50 ±14 MHz

Antenna Gain

(dBic) where G.P. =

Ground Plane

Free

Space

4 ft.

G. P.

Free

Space

4 ft.

G. P.

Free

Space

4 ft.

G. P.

Free

Space

4 ft.

G. P.

Free

Space

4 ft.

G. P.

90° zenith +3.3 +2.0 +3.1 +4.8 +2.7 +1.4 +1.5 +2.4 +1.0 -2.0

10° elevation -3.0 -2.5 -3.9 -3.5 -3.7 -3.4 -5.8 -6.3 -5.5 -5.1

20° elevation -1.6 +0.4 -2.3 -0.3 -2.5 -0.5 -3.9 -3.2 -3.9 -1.9

30° elevation -0.8 +1.6 -0.4 +1.8 -1.5 +0.5 -2.1 -1.2 -1.2 -0.5

60° - 90° elevation >+2.6 >+1.6 >+2.0 >+2.6 >+2.0 >-0.2 >0.3 >-0.1 >-0.1 >-0.5

Beamwidth (3 dB) 100° 150° 105° 115° 100° 145° 100° 110° 95° 145°

LNA gain (typical) 26 dB 30 dB 26 dB 30 dB 33 dB

Polarization Right-hand circular

Noise figure

(typical)

3.0 dB

Nominal

impedance

50 Ω

VSWR < 2.0 : 1

POWER

Input voltage 3.8 - 6.0 VDC

Current (typical) 60 mA @ 5 V

PHYSICAL

Dimensions 7.62 cm (3.00”) Wide x 11.938 cm (4.70”) Long x 2.611 cm (1.028”) High

Weight 224 g (7.9 oz.)

ENVIRONMENTAL

Maximum altitude 21,336 m (70,00 ft.)

Operating/Storage

temperature

-40°C to +85° C (-67°F to +185°F)

Vibration >30 G

Designed to meet

these standards

DO-160D, MIL-C-5541, MIL-E-5400, MIL-I-45208A and MIL-STD-810

MECHANICAL DRAWINGS

Dimensions are in inches, followed by [mm]

PHASE CENTER

Refer to the Mechanical Drawings before reading this section.

HEIGHT = Vertical phase center offset from antenna reference point or antenna reference plane (ARP)

For relative offset numbers and phase center variation (PCV) tables, please visit the U.S. National

Geodetic Survey (NGS) website at www.ngs.noaa.gov/ANTCAL/. Look for ANTCOM ACCG5ANT_42AT1.

For absolute offset numbers and to download PCV tables, please visit the GEO++ website at

www.geopp.com.

When using either of the websites mentioned above, look for the NovAtel listing of your antenna model

and its hardware revision.

Please check our website for updates to this manual at

www.novatel.com/Downloads/docupdates.html and

the websites mentioned above.

If you need any further advice on this matter, please visit our website at www.novatel.com. Other methods

of contacting Customer Service can be found on the last page of this guide.

WEEE

If you purchased a GNSS-302L-A antenna in Europe, 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 ( ).

See www.novatel.com/products/compliance/environmental-compliance/ for more information.

ROHS

The GNSS-302L-A is compliant with the European Union (EU) Restriction of Hazardous Substances

(RoHS) Directive 2011/65/EU.

WARRANTY POLICY

NovAtel Inc. warrants that its Global Navigation Satellite System (GNSS) products are free from defects in materials

and workmanship, subject to the conditions set forth on our web site:

www.novatel.com/products/warranty.

GNSS Antenna™ Modules: One (1) Year

Cables and Accessories: Ninety (90) Days

RETURN INSTRUCTIONS

To return products, refer to the instructions found under the Return Policy Tab on the warranty page:

www.novatel.com/products/warranty.

QUESTIONS OR COMMENTS

If you have any questions or comments, please log a support request with NovAtel Customer Support using one of the

following methods:

Log a Case and Search Knowledge:

Website: www.novatel.com/support

Log a Case, Search Knowledge and View Your Case History: (login access required)

Web Portal: https://novatelsupport.force.com/community/login

E-mail:

support@novatel.com

Telephone:

U.S. and Canada: 1-800-NOVATEL (1-800-668-2835)

International: +1-403-295-4900

Unpublished rights reserved under international copyright laws.