Leica mojoRTK How-To Manual page 3

Channels 10 to 19 on the 900MHz systems can help avoid
interference as those channels actually increase the over-the-
air data rate (not the total data, just how fast the bursts of
data are sent).
This helps to avoid interference as the radio requires less
transmission time to get the data through potentially avoiding
other bursts of transmissions from the interfering devices.
However, there is a downside to the higher data rate. The
higher data rate can shorten the range when the signal starts
to get weak. Its main purpose is to improve reliability when
within good range but suffering interference.
Basic mojoRTK Base to Console Communications Troubleshooting.
See the points below on general troubleshooting with the mojoRTK base
communications:
Check that the antennas are vertical and not folded over as
the standard mojoRTK antennas can fold down to prevent
breakage.
The 900MHz base stations sold in North America and Australia
provide a multi-transmit option. When turned on, the multi-
transmit sets the base radio to transmit each section of data
up to 3 more times. The base radio in the console is smart
enough to ignore any data that it receives more than once,
however, the multi-transmit increases the chance that the
console does actually receive the data at least once. To turn
multi-transmit on or off you need to go to Settings→Mulit-
Transmit in the base station menu and choose either Off, 1,
2, or 3.
When you turn multi-transmit on, the base station
will use more power and will drain internal or
external batteries faster.
If you are using a repeater with the internal base
radio you should not be using multi-transmit as they
are not compatible.
Some radio installers are used to mounting antennas with a
ground plane. This should not be done with the standard
mojoRTK base radio antennas or any other dipole antenna (if
you are using high gain antennas for the base to console
antennas they will most likely be dipoles).
The 900MHz radios have different transmit mode when you
use channels 10 to 19 (explained above) and may be worth a
try to avoid interference.
For more information
www.mojoRTK.com
Page 3/9 Document #1060 rev1.0
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