Novatel Stereo System GPS 702L User Manual

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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