Novatel GPS-704-X User Manual
GPS-704-X
The GPS-704-X is a wide band passive
antenna designed to operate at the
following frequencies (in MHz):
GPS L1 (1575.42), L2 (1227.60) and
L5 (1176.45)
Galileo L1 (1575.42), E5a and E5b (1164-1215) and
E6 (1215-1300)
Glonass L1 (1598 - 1611.5) and L2 (1242.5 - 1254.3)
OmniSTAR/CDGPS differential correction services (1 525 - 15 59)
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-704-X:
• 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
• 1 short coaxial cable with a male TNC connector for the
antenna
• An external Low Noise Amplifier (LNA)
• 1 coaxial cable between the receiver and the LNA
• Power supply and power cable (dependant on LNA)
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-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.
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. Mount an LNA close to the RF
output of the antenna, see LNA Setup later in this guide.
5. Attach the other end of the coaxial cable to an LNA (1
below), see the LNA Setup section of this guide. All NovAtel
GPS receivers provide a 5 V power source for the LNA
through their antenna RF connectors (2).
6.
The LNA may either receive power from a NovAtel receiver
or a separate power source. If you provide separate power
(3) to the LNA, you must insert a DC block between the LNA
and the receiver.
ANTENNA CARE
The GPS-704-X 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 PATTERNS
SPECIFICATIONS
USER GUIDE
5/8 x 11
thread
"
3/8 - 7/8 9 - 22 mm"" (
)
Mount
Metal
adapter
Jam nuts
or flange
TNC connector
Coaxial
cable
LNA
Usersupplied
power
NovAtel
receiver
1
2
3
RF
3 dB pass band (typical) 1150-1650 MHz
Gain at zenith (
θ = 90°) (min)
L1: +6 L2:+2.5 L5: +2 (dBic)
Gain roll-off (zenith to horizon) L1: 14 L2: 11 L5: 11 (dB)
Polarization Right-hand circular
Nominal impedance 50 Ω
VSWR ≤ 2.0 : 1
POWER
See the LNA Setup section of this guide.
PHYSICAL
Diameter
185 mm (7.28")
Weight 46 8 g (1 6.5 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)
Salt spray MIL-STD-810F Method 509.4
Ingress protection IPX6 and IPX7
MECHANICAL DRAWINGS PHASE CENTER
Height = Vertical phase center offset from the antenna refere nce
point or antenna reference plane (ARP)
LNA SETUP RECOMMENDATIONS:
It is recommended that an external Low Noise Amplifier (LNA)
and cables are used with the GPS-704-X antenna. Cable lengths
are determined by their loss. A short cable should be connected
between the antenna and the LNA with a maximum loss of 1 dB.
A longer cable with a maximum loss of 10 dB is permitted
between the LNA and the receiver.
The following table provides some recommended specifications
for choosing the external parts.
WARRANTY POLICY
NovAtel Inc. warrants that its Global Positioning System (GPS) products
are free from defects in materials and workmanship, subject to the
conditions set forth below, for the following periods of time:
GPSAntenna™ Modules: One (1) Year from date of sale
Cables and Accessories: Ninety (90) Days from date of sale
Date of sale shall mean the date of the invoice to the original customer
for the product. NovAtel's responsibility respecting this warranty is
limited solely to product repair at an authorized NovAtel location only.
Determination of repair will be made by NovAtel personnel or by technical personnel expressly authorized by NovAtel for this purpose.
The foregoing warranties do not extend to
(i) nonconformities, defects or errors in the products due to accident,
abuse, misuse or negligent use of the products or use in other than a
normal and customary manner, environmental conditions not
conforming to NovAtel’s specifications, or failure to follow prescribed
installation, operating and maintenance procedures, (ii) defects, errors
or nonconformities in the products due to modifications, alterations,
additions or changes not made in accordance with NovAtel’s specifications or authorized by NovAtel, (iii) normal wear and tear, (iv) damage
cause by force of nature or act of any third person, (v) shipping damage;
or (vi)service or repair of product by the dealer without prior written
consent from NovAtel.
In addition, the foregoing warranties shall not apply to products designated by NovAtel as beta site test samples, experimental, developmental, preproduction, sample, incomplete or out of specification
products or to returned products if the original identification marks have
been removed or altered.
The warranties and remedies are exclusive and all other warranties,
express or implied, written or oral, including the implied warranties of
merchantability or fitness for any particular purpose are excluded.
NovAtel shall not be liable for any loss, damage or expense arising
directly or indirectly out of the purchase, installation, operation, use or
licensing or products or services. In no event shall NovAtel be liable for
special, indirect, incidental or consequential damages of any kind or
nature due to any cause.
There are no user-serviceable parts in the GPSAntenna and no maintenance is required. If the unit is faulty, replace with another unit and
return the faulty unit to NovAtel Inc. You must obtain a RETURN MATERIAL AUTHORIZATION (RMA) number by calling NovAtel Customer
Service at 1-800-NOVATEL (U.S. and Canada only) or 403-295-4900
before shipping any product to NovAtel or a dealer. Once you have
obtained an RMA number, you will be advised of proper shipping procedures to return any defective product. When returning any product to
NovAtel, please return the defective product in the original packaging to
avoid damage.
Before shipping any material to NovAtel or Dealer, please obtain a
Return Material Authorization (RMA) number from the point of purchase. You may also visit our website at http://www.novatel.com
and select Support | Repair Request from the menu.
WEEE NOTICE
If you purchased your 704-X in Europe, please return it to your dealer or
supplier at the end of its life. The objectives of the European Community's environment policy are, in particular, to preserve, protect and
improve the quality of the environment, protect human health and utilise
natural resources prudently and rationally. Sustainable development
advocates the reduction of wasteful consumption of natural resources
and the prevention of pollution. Waste electrical and electronic equipment (WEEE) is a regulated area. Where the generation of waste
cannot be avoided, it should be reused or recovered for its material or
energy. WEEE products may be recognised by their wheeled bin label.
RoHS NOTICE
The 704-X is compliant with the European Union (EU) Restriction of Hazardous Substances (RoHS) Directive 2002/95/EC.
PATENT NOTICE
The GPS-704-X is manufactured and protected under U.S.
Patents #6,445,354 B1, #6,452,560 B2 and (patent pending) File
No 16437-0225.
QUESTIONS OR COMMENTS
If you have any questions or comments regarding your GPS704-X antenna, please contact NovAtel Customer Service using
one of methods provided below.
Email: support@novatel.ca
Web: www.novatel.com
Phone: 1-800-NOVATEL (U.S. & Canada)
403-295-4900 (International)
Fax: 403-295-4901
© Copyright 2005-2006 NovAtel Inc. All rights reserved.Printed in Canada on recycled paper.
Unpublished rights reserved under international copyright laws. Recyclable.
OM-20000101 Rev 2 April 27, 2006
TOP
VIEW
BOTTOM
VIEW
1
00
60.6
69.
1
Ø185
Ø170
194.5
SIDE
VIEW
Height
A
ll dimensions are in millimeters (mm
)
where 1 inch = 25.4 mm
= PHASE CENTER
Tape measure
station
H/W Rev: 1.00 P/
N
: 0101xxxx
MADE IN CA
N
ADA www.novatel.com
N
VH99999999
GPS-70x A
N
TE
N
N
A
ARP
100 mm
40 mm
A
RP
52 mm
Components Specifications
LNA Noise Figure 1.5 dB
LNA Bandwidth 1100-1700 MHz
Group Delay Variation Across LNA Bandwidth 5 ns max
LNA Gain 25 dB min.
LNA VSWR 2:1 max
Cable Loss Between Antenna and LNA 1 dB max
Cable Loss Between LNA and Receiver 10 dB max
Connectors TNC
LNA and Cable Impedance 50 Ω
100 mm
40 mm
ARP
52 mm
704-X:
User Guide:
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