GPS-702-GG, GPS-701-GG and GPS-702-GG-N
The GPS-702-GG, GPS-701-GG and GPS-
702-GG-N are active antennas designed to
operate at the following frequencies (in
MHz):
GPS L1 (1575.42) and L2 (1227.60)
Glonass L1 (1598 - 1611.5) and L2 (1242.5 - 1254.3)
This guide provides the basic information you need to install and
begin using your new antenna.
ADDITIONAL EQUIPMENT REQUIRED
The equipment listed below is required to set up the GPS-702-
GG, GPS-701-GG or GPS-702-GG-N antenna:
•
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)
•
A 1" open-end wrench
•
Coaxial cable with a male TNC connector (N-Type con-
nector for GPS-702-GG-N).
•
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.)
SITE SELECTION GUIDELINES
Before installing the antenna, select a site that as closely as
possible meets the following conditions for optimal performance:
•
An unobstructed 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 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.
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 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.
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.
The metal adapter on the bottom of the antenna is fixed in place.
Do not attempt to remove it.
3. Remove the dust cap from the antenna’s TNC connector (N-
Type connector for GPS-702-GG-N).
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).
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.
ANTENNA CARE
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.
ELEVATION GAIN PATTERN
SPECIFICATIONS
USER GUIDE
5/8 x 11
thread
"
3/8 - 7/8 9 - 22 mm
"
" (
)
Mount
Metal
adapter
Jam nuts
or flange
Coaxial
cable
702-GG only
RF
3 dB pass band (typical)
L1: 1588.5
±
23.0 MHz
L2: 1236.0
±
18.3 MHz
Out-of-band rejection (typical)
±
100 MHz
±
200 MHz
30 dBc
50 dBc
Gain at zenith (
θ
= 90°) (min)
L1: +5 dBic
L2: +2 dBic
Gain roll-off (zenith to horizon)
L1: 13 dB
L2: 11 dB
LNA gain (typical)
27 dB
Polarization
Right-hand circular
Noise figure (typical)
2.5 dB
L1-L2 differential propagation
delay (maximum)
5 ns
Nominal impedance
50
Ω
VSWR
≤
2.0 : 1
POWER
Input voltage
4.5 - 18.0 VDC
Current (typical)
35 mA
PHYSICAL
Diameter
185 mm (7.28
"
)
Weight
500 g (17.6 oz)
ENVIRONMENTAL
Maximum altitude
9000 m (29527.5 ft)
Operating temperature
-40°C to +85°C (-40°F to +185°F)
Storage temperature
-55°C to +85°C (-67°F to +185°F)
Vibration
Random: MIL-STD-202F Method
214, Test Curve A
Sine:
SAEJ1211, Section 4.7
Salt spray
MIL-STD-810F Method 509.4
Ingress protection
IPX6 and IPX7
