•
•
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 multipath 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.
4. Attach the male TNC (or N-Type) connector of the coaxial
cable to the antenna’s TNC connector (N-Type for GPS-702-
GG-N).
SPECIFICATIONS
GPS-702-GG, GPS-701-GG and GPS-702-GG-N
USER GUIDE
RF
L1: 1588.5 ± 23.0 MHz
L2: 1236.0 ± 18.3 MHz
3 dB pass band (typical)
Out-of-band rejection (typical)
± 100 MHz
The GPS-702-GG, GPS-701-GG and GPS-
702-GG-N are active antennas designed to
operate at the following frequencies (in
MHz):
INSTALLING THE ANTENNA
30 dBc
50 dBc
After a site has been selected, install the antenna as follows.
± 200 MHz
Coaxial
cable
1. Verify that the thread on the mount does not extend more
than 7/8" (22 mm) to ensure the plastic inside 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-tight-
ened.
L1: +5 dBic L2: +2 dBic
Gain at zenith (θ = 90°) (min)
Gain roll-off (zenith to horizon) L1: 13 dB
L2: 11 dB
GPS L1 (1575.42) and L2 (1227.60)
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. All
NovAtel GPS receivers provide the necessary power
through their antenna RF connectors.
LNA gain (typical)
Polarization
27 dB
Glonass L1 (1598 - 1611.5) and L2 (1242.5 - 1254.3)
Right-hand circular
2.5 dB
This guide provides the basic information you need to install and
begin using your new antenna.
Noise figure (typical)
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. Using a wrench, tighten the
adapter to the mount.
L1-L2 differential propagation
delay (maximum)
5 ns
ANTENNA CARE
ADDITIONAL EQUIPMENT REQUIRED
The GPS-702-GG, GPS-701-GG and GPS-702-GG-N are
designed to withstand the elements, including rain, snow, and
dust. However, to ensure your antenna performs optimally, keep
the radome (top surface of the antenna) clean and brush off any
ice and snow. In addition, ensure the TNC (or N-Type) connector
remains clean and dry and replace the dust cap when a cable is
not connected.
The equipment listed below is required to set up the GPS-702-
GG, GPS-701-GG or GPS-702-GG-N antenna:
Nominal impedance
VSWR
50 Ω
≤ 2.0 : 1
•
A mount, such as a range pole, tribrach, or tripod, with a
5/8" x 11 thread that extends between 3/8" and 7/8" (9
mm and 22 mm)
POWER
Input voltage
4.5 - 18.0 VDC
35 mA
•
•
A 1" open-end wrench
Coaxial cable with a male TNC connector (N-Type con-
nector for GPS-702-GG-N).
Current (typical)
Metal
adapter
PHYSICAL
ELEVATION GAIN PATTERN
5/8" x 11
3/8" - 7/8" (9 - 22 mm)
thread
Diameter
Weight
185 mm (7.28")
500 g (17.6 oz)
•
A device with an antenna input port that both receives
the RF signal and provides 4.5 - 18.0 VDC to the
antenna (All NovAtel GPS receivers provide the neces-
sary power through their antenna RF connectors.)
Jam nuts
or flange
ENVIRONMENTAL
Mount
Maximum altitude
9000 m (29527.5 ft)
SITE SELECTION GUIDELINES
ꢀ The metal adapter on the bottom of the antenna is fixed in place.
Operating temperature
Storage temperature
-40°C to +85°C (-40°F to +185°F)
-55°C to +85°C (-67°F to +185°F)
Do not attempt to remove it.
Before installing the antenna, select a site that as closely as
possible meets the following conditions for optimal performance:
Random: MIL-STD-202F Method
214, Test Curve A
3. Remove the dust cap from the antenna’s TNC connector (N-
Type connector for GPS-702-GG-N).
Vibration
•
An unobstructed line-of-sight from horizon to horizon
and at all bearings and elevation angles
Sine:
SAEJ1211, Section 4.7
Salt spray
MIL-STD-810F Method 509.4
IPX6 and IPX7
Ingress protection
702-GG only
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