detailed in the SPECIFICATIONS section of this guide. All
NovAtel GPS receivers provide the necessary power
through their antenna RF connectors.
INSTALLING THE ANTENNA
GPS-702L
RF
LNA gain (typical)
27 dB (typical)
After a site has been selected, install the antenna as follows:
USER GUIDE
Polarization
Right-hand circular
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, add jam nuts or washers to shorten the
exposed thread, ensuring any nuts are well-tightened.
Out-of-band rejection (typical)
ANTENNA CARE
The GPS-702L is an active antenna
designed to operate at the GPS L1 and L2
frequencies, 1575.42 and 1227.60 MHz
and across the L-Band from 1525 to 1560
MHz. It also has excellent reception of low
elevation angle satellites (for example,
CDGPS, OmniSTAR, GPS, SBAS). The 702L can be distin-
guished from other GPS-700 models by its grey rim. This guide
provides the basic information you need to install and begin
using your new antenna.
L2:
1127 MHz
1177 MHz
1277 MHz
1327 MHz
1442 MHz
1470 MHz
1635 MHz
1675 MHz
50 dB
30 dB
25 dB
50 dB
50 dB
30 dB
30 dB
50 dB
The GPS-702L is designed to withstand the elements, including
rain, snow, and dust. However, to ensure your antenna performs
optimally, keep the radome (the top surface of the antenna)
clean and brush off any ice and snow. In addition, ensure the
TNC connector remains clean and dry and replace the dust cap
when a cable is not connected.
L1/LB:
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.
Antenna elevation pattern
Peak gain (θ=90°)
Pattern roll-off (θ=90° to θ=0°)
ELEVATION GAIN PATTERN
5.0 dBic (L1/LB); 1.5 dBic (L2) (min.)
13.0 dB (L1/LB); 12.0 dB (L2) (typical)
2.5 dB (typical)
ADDITIONAL EQUIPMENT REQUIRED
Noise figure (typical)
L1-L2 diff. propagation delay
Nominal impedance
VSWR
15 ns (maximum)
50 Ω
Metal
adapter
The equipment listed below is required to set up the GPS-702L:
•
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)
5/8" x 11
3/8" - 7/8" (9 - 22 mm)
thread
≤ 2.0 : 1
POWER
•
•
•
A 1" open-end wrench
Input voltage
+4.5 to +18.0 VDC
Jam nuts
or flange
Mount
Coaxial cable with a male TNC connector
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.)
Current consumption
33 mA (typical)
PHYSICAL
ꢀ The metal adapter on the bottom of the antenna is fixed in place.
Diameter
Weight
185 mm (7.28")
500 g (17.6 oz)
Do not attempt to remove it.
RHP
LHP
3. Remove the dust cap from the antenna’s TNC connector.
ENVIRONMENTAL
9000 m (29527.5 ft)
SITE SELECTION GUIDELINES
Maximum altitude
4. Attach the male TNC connector of the coaxial cable to the
antenna’s TNC connector.
Operating temperature
Storage temperature
-40°C to +85°C (-40°F to +185°F)
-55°C to +85°C (-67°F to +185°F)
Before installing the antenna, select a site that as closely as
possible meets the following conditions for optimal performance:
Random Vibe: MIL-STD-810F,
Method 514.5, 7.706, 1 hour per axis
•
An unobstructed line-of-sight from horizon to horizon
and at all bearings and elevation angles
Scale: 5 dB/ring
Vibration (operating)
Shock and bump
TNC connector
Sinusoidal Vibe: ASAE 5.15.2, Level1
•
As far as possible from RF 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 RF reflective surfaces are within 30
m, ensure the site is as high as possible. Otherwise,
mount the antenna as low to the ground as possible.
SPECIFICATIONS
IEC 68-2-27, Ea (shock) 40G
IEC 68-2-29, Eb (bump) 40G, 6 ms,
4000 pulses per axis
Coaxial
cable
RF
L1:
L2:
LB:
1575 ± 20 MHz
1228 ± 20 MHz
1543 ± 20 MHz
•
Salt spray
MIL-STD-810F, 509.4
IEC 60529 IPX7
3 dB pass band (typical)
5. Attach the other end of the coaxial cable to the antenna input
port of the receiving device, which must provide power as
Waterproof
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