Thales Z-Max Operation And Application Manual page 285

2. If this is not possible, move to higher ground or a location where there is less
obstruction.
3. If, after moving, the rover radio begins to receive data from the base, then the
previous location is too obstructed from the base. You will need to either raise the
base radio antenna higher, or move the base to a location with less obstruction
between the base and rover radio antennae.
Go to step 5 below if the problem is not yet resolved.
Step 5. Are you within range specifications of your radio system?
The range within which your radio system will function varies greatly with the
conditions under which the system is being used. With clear line-of-sight between the
base and rover radio antennae, and no interference on the frequencies you are
working on, a UHF system can function with tens of miles of separation.
Unfortunately, these are ideal situations seldom found. In most situations, the range of
UHF radio will be limited to under 5 miles.
Not within range specifications
Move within range. Either move closer to the base system, or move the base
system closer to you.
Within range specifications
Move closer to the base receiver to test the system. Since radio range is difficult
to predict due the varying effects of local conditions, try moving closer to the base
in an attempt to resolve the problem.
If by moving closer you find that the rover radio begins to receive data, the
previous location is out-of-range of the radio system. You will need to elevate the
base radio antenna or move the base to a location closer to you to solve the
problem.
Go to step 6 below if the problem is not yet resolved.
Step 6. Are you being jammed?
When working with UHF radios, it is possible that the frequency you are using is being
shared with other people in your vicinity. Traffic on this frequency can interfere with
the rover system's ability to receive data from the base. The effect may be no
reception of base data or intermittent reception of data. Both are detrimental to proper
operation of the RTK system. Interference can be a problem with UHF radios.
There are two methods to determine if there is traffic on the frequencies you wish to
use. The best method is to acquire a handheld scanner and to listen for traffic on the
262 Z-Max Surveying System Operation and Applications Manual