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To ensure that you provide the MobileMapper Beacon with
the best chance to receive a relatively noise-free signal, here
are some precautions that you should be aware of:
• If you use a belt-worn pager or mobile phone, ensure that
you wear it on the opposite side of your body so that it's
away from the MobileMapper Beacon.
• Wear the MobileMapper Beacon on the same side of
your body as write with a pen. For instance, if you are
right-handed, wear the beacon system on your right hip.
• If, for some reason, you have a notebook or tablet com-
puter nearby, ensure that it's a few feet away from the
MobileMapper Beacon system.
We have found that personal digital assistants (PDA's) emit
noise that can mask the beacon signal, but they often do not
emit as much noise as a full computer system. You may find
that there's little interference from such a system within one
or two feet.
Troubleshooting Reception
The first thing to confirm when troubleshooting beacon re-
ception problems is to monitor the lock LED indicator. If it's
on, the receiver is locked. If you find that it's on most of the
time, chances are that there's sufficient data being passed to
the GPS system to allow differential correction to happen. If
you find that the light is most often off, or always off, this
would be an indication of reception problems.
Reception problems can be confirmed using the Configura-
tion Utility described previously, by monitoring the SNR
value. If you find the SNR is very low, you should confirm
that the frequency or station to which the receiver is tuned,
is the correct one. If it is not, re-tune the receiver to the cor-
rect station or frequency.
If you find that the receiver is tuned to the right station, you
need to determine if the problem is associated with too much
noise in your area, use of the product in a region of very
weak signal, a service-side failure, or a failure of the receiver
system itself.
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