RTK GNSS frequently asked questions
Additional Technical FAQs for the
iG8 and iG8a can be found [ here ]
Considering upgrading to SurvCE / SurvPC
Version 6.06 through 6.08? [
Read This ]
IMPORTANT! SurvCE / SurvPC versions higher than 6.08 are no longer
compatible with the iG8. [
IMPORTANT! The iG8 internal HDSP+ GSM modem will not be supported
by ATT after February 2021.
1. What is there a difference between the iG8
The iG8 has a 3.75G GMS Modem. The
iG8a does not have a cell modem.
The iG8 has a Satel TR4 UHF modem. The iG8a has a Satel TR4+ UHF
The iG8 has a 2-year iGage warranty. The iG8a has a 1-year iGage
iG8a kit does not include a Hold-a-Pole, a SIM Card adapter kit
or a SIM Card.
There are a limited number of iG8a receivers available. We expect
we have a 5 to 6 month supply available. Then we expect to no
longer be able to manufacture the iG8a because of
2. Is there a difference between the iG8a Base
No, they are identical. We
typically choose the device with the lower serial number to be
the Base when
configuring Base/Rover pairs.
3. Are dual head boxes available?
Yes, currently ONLY dual head cases that hold both a Base and Rover
are available. Check current status when you order.
4. What are the benefits of the iG9 over the
The iG9/iG9a has
a 4GLTE GSM modem.
The iG9 has IMU
The iG9/iG9a has
a BD990 engine, the iG8/iG8a has a BD970 engine. The iG9 tracks
BeiDou B3, has more channels, has the MAXPro option which
increases performance under heavy canopy.
What are the benefits of the iG8a over the
Other than the
absence of an internal 3.75G GSM modem, there is no difference
between these devices.
What are the benefits of the iG8a over the
Much faster data collector update
(five to 10 times faster!)
Dual batteries: 2x the operating
time, hot-swappable, battery door easily opened with one finger.
Expected Run Time ]
Better cell phone 3.75G, easier to
deploy network based rovers. The iG8a does not have a cell
Built in hotspot, so you can
connect other devices to the iG8 for internet connectivity. The
iG8a will not act as a hotspot.
Wi-Fi: Easier to do high level
configuration via web browser on smart phone.
Front Panel Operation: Easier to
configure as Base / Rover / Network Rover from front panel.
Cast magnesium alloy case is robust. The phase center of the iG8 is less affected by what is
'under' the receiver's magnesium bottom.
iG8 weighs less (yes, the iG8
weighs less with two batteries installed than the X91+ does with
iG8 is still water and dust proof
with the battery door open (although the battery terminals will
plate if you run it underwater with the battery door open.
The iG8 includes twice as many
batteries and each of the batteries hold 50% more power. The iG8
comes with a quad-four-station charger.
The iG8 USB download cable is a standard
USB-mini cable. You can purchase replacements from Amazon for
here ] or
at any store that sells electronics (even Wal-Mart.) (This beats
the special $125 cables on the X91.)
The iG8 Heavy Duty power cables
are included with all Base and Base/Rover kits.
It is possible to download iG8
collected RINEX files via the Wi-Fi interface.
An iG8 will retransmit network
corrections received from a network server, out over the UHF
radio for other devices on site to 'share'.
If you are considering the
purchase of X91+ receivers, please reconsider and purchase iG8
receivers. Call us if you have questions.
What are the benefits over the CHC i80
BD970 50Hz engine vs. BD930 20 Hz engine, larger ground plane
and easier repairs.
5. How long can I record static data on the
A very long time. About 27
gigabytes of internal memory is available. You can collect data
into 8 different 'streams' at extremely high rates.
You can use the supplied USB-OTC cable [
to expand with essentially unlimited external expansion memory
The iG8 will also automatically
convert and directly store RINEX files.
6. Why the big iG8 lettering on the side of
the iG8 receiver?
to make it easy to tell them apart in your site pictures. The
iG4 has side lettering for the same reason.
With the logo lettering, you
can tell which antenna model to use when submitting observation
data from the site picture. That can't be bad.
7. What is the UHF radio range of the iG8?
The internal Satel radios are
amazing. We supply an 18' long UHF extension cable for mounting
the supplied UHF antennas on high poles for extending the Base
UHF transmitting range.
Also, it is possible to configure
a base to both transmit corrections via the UHF radio and
through the internal cellular modem to APIS, which will extend
operation to 'where ever you have cell data service.'
We also have very reasonably
priced high powered repeater packages.
FCC license is required to use the iG8/iG8a in the UHF Base
mode. We highly recommend [
FIT ] to
help obtain a license.
8. Will the iG8 work with xxx software?
The iG8 works best with GeoMax X-Pad.
The iG8 works great with Field Genius.
LandStar7 is a great solution for GPS / GPS + TS work.
The iG8 works with SurvCE and SurvPC
version 5.08 through 6.08. iGage receivers are not supported by
Carlson SurvCE and SurvPC versions higher than 6.08.
The iG8 can be completely
configured by the Web User Interface via Wi-Fi, so you can
configure 'everything' with the web browser on your phone. It
may be possible to completely configure a base or rover with
your cell phone and then connect 'most' survey data collector
software packages that accept standard NMEA streams.
Another iG8 bonus is you can configure it
to just 'go online and connect to the network' after it boots.
So if you are using a network rover, you don't have to do
anything other than push the power button--a few minutes later
you have a fixed solution and are ready to survey.
9. How come iGage has the best prices for RTK
in the United States?
Really? Well, we have the best support,
factory service and User Manuals too.
iGage: price ]
10. Does the iG8 generate G-Vectors in
Carlson and X-PAD?
Yes. G-Vectors are generated
starting with V5.08 through V6.08 of SurvCE and SurvPC. (Don't feel bad if you
don't know what they are, very few people need or care.)
X-PAD exports G-Vector equivalents in GVX format.
11. Does the iG8 have an IMU for tilt measurement in addition to an
The iG8 has an electronic bubble.
Tilt compensation requires a compass for heading and this
feature is not available on the iG8.
12. Are the batteries standard?
Yes, the battery form factor is a
standard size. They are available from Amazon and most online
battery vendors. Some are as little as $12 / pair delivered.
These 2nd market batteries will work great in the iGx however
after a few charge cycles you may find that the capacity is
reduced. If you purchase non-factory batteries, please read this
Note on other Batteries ].
We are currently shipping the
highest capacity and quality batteries that we can procure. They
are 3,400 mAH cells and they hold nearly their full capacity
after many charge cycles.
After using our high capacity batteries you will
probably be very disappointed with other batteries. However,
we know you can find hundreds of compatible battery offerings on
Amazon and eBay.
For safety reasons, please don't
use our chargers to charge non-iGage supplied batteries for you
system; don't charge iGage batteries in 3rd party chargers.
13. Will the iG8 Base run without internal
We strongly recommend that you
have at least one, charged, battery in the iG8. This assists in
providing enough startup current when the device is turned on.
In addition the batteries slightly
change the antenna phase center. The iG8 antenna was calibrated
with two batteries in the case, so heads with batteries won't
match those without as well. That said, the difference is only a
few millimeters, which might not be a big deal for your
14. How does the iG8 compare with other receivers under moderate and
We believe that the GNSS engines
that we use in the iG8 is the best engine there is. In our head
to head testing, both in matched base rover pairs and VRS
Network evaluations, the iG8 is as good as any other receiver.
Part of the comparison is fully
enabled engines, the iG8 is fully enabled to track Galileo, L2C,
L5, GLO-L3 out of the box. If you compare the fully enabled iG8
to another device with the same internal GNSS engine that is not
fully enabled, the iG8 will probably be better because 'more
satellites is more better.'
Your local canopy will make a
difference too. To really know how well the iG8 is going to
perform, you need to do a head to head comparison. (We can help
with this, give us a call and we can send you an evaluation
[ Yes ]
16. How fast can the iG8 update measurements on a data collector?
5-Hz is the
fastest update rate. Check out the display update videos [
17. Can the iG8 be used as a network base
using cellular data sim cards?
APIS ] and [
NTRIP / DIP ] configurations
iG8a: No. You
must use DCI (Data Collector Internet) with the iG8a.
18. Is a cigarette lighter plug available for
the battery charger?
Any 5.5 mm x 2.5
mm barrel adapter with 12 V + center will work. [
19. Will the iG8 work as a GNSS sensor (GPS) with ESRI®
an iG9 or iG9a for use with ESRI Collector. See