Novatel GPS-702L specifications Additional Equipment Required, Installing The Antenna, User Guide

GPS-702L

USER GUIDE

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.

ADDITIONAL EQUIPMENT REQUIRED

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, add jam nuts or washers to shorten the exposed thread, ensuring any nuts are well-tightened.

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.

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-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.

ELEVATION GAIN PATTERN

		RF
LNA gain (typical)		27 dB (typical)
Polarization		Right-hand circular
Out-of-band rejection (typical)
L2:	1127 MHz	50 dB
	1177 MHz	30 dB
	1277 MHz	25 dB
	1327 MHz	50 dB
L1/LB:	1442 MHz	50 dB
	1470 MHz	30 dB
	1635 MHz	30 dB
	1675 MHz	50 dB
Antenna elevation pattern
Peak gain (θ=90°)		5.0 dBic (L1/LB); 1.5 dBic (L2) (min.)
Pattern roll-off (θ=90° to θ=0°)		13.0 dB (L1/LB); 12.0 dB (L2) (typical)
Noise figure (typical)		2.5 dB (typical)

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)

• A 1" open-end wrench

• Coaxial cable with a male TNC connector

• A device with an antenna input port that both receives

5/8" x 11

thread

Jam nuts or flange

Metal adapter

3/8" - 7/8" (9 - 22 mm)

Mount

L1-L2 diff. propagation delay		15 ns (maximum)
Nominal impedance		50 Ω
VSWR		≤ 2.0 : 1
	POWER
Input voltage		+4.5 to +18.0 VDC
Current consumption		33 mA (typical)
		PHYSICAL

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 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.

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.

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

TNC connector

Coaxial

cable

5.Attach the other end of the coaxial cable to the antenna input port of the receiving device, which must provide power as

RHP

LHP

		Scale: 5 dB/ring
SPECIFICATIONS
	RF
3 dB pass band (typical)	L1:	1575 ± 20 MHz
	L2:	1228 ± 20 MHz
	LB:	1543 ± 20 MHz

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)
		Random Vibe: MIL-STD-810F,
Vibration (operating)		Method 514.5, 7.706, 1 hour per axis
		Sinusoidal Vibe: ASAE 5.15.2, Level1
Shock and bump		IEC 68-2-27, Ea (shock) 40G
		IEC 68-2-29, Eb (bump) 40G, 6 ms,
		4000 pulses per axis
Salt spray		MIL-STD-810F, 509.4
Waterproof		IEC 60529 IPX7