Spectra Precision ProMark 800 Reference Manual User Manual

Page 111

Troubleshooting

Step 1. Has the

Receiver Been

Powered Up?

To determine if the receiver is powered up, examine the power
LED on the front panel of the receiver. If the LED is on, the
receiver is on.

1. If the receiver is not powered up, turn on the receiver by

pressing and holding the power key on the front panel. The
button must be held for a few seconds since there is a
delay in power on. You will see the power LED turn on and
the display will show the logo followed by the message
“Starting...”.

2. If the receiver does not power up, check the power source.

The receiver supports both internal (battery) and external
power sources.

If using the internal power source, make sure the internal
battery has been fully charged before it was inserted in the
receiver. A too low battery will prevent the receiver from
powering up.

If using external power, check to ensure the power cable
is properly connected to both the external battery and the
receiver.

•

If the cable is properly connected, check the power
level of the external power source. If low, replace the
battery with a charged battery and turn on the receiver.

•

If the external power source is good and the cable is
connected to both the receiver and the power source,
there may be a problem with the cable. If available, try
a different power cable. If the new cable works, the old
cable is malfunctioning. Call your local dealer or email
technical support to have the cable repaired.

3. If the receiver is now powered up, go to step 2.

Step 2. Does the

Number of Tracked

Satellites Stay

Abnormally Low?

1. Check the information displayed on the receiver front

panel. In the upper line, starting from the left, the first
number displayed should gradually rise from 0 to 8 or
more. This information represents the number of tracked
satellites. In the same time, the last number in the same
line should increase as well, in the same proportion. This
information represents the number of satellites actually
used by the receiver, and should be equal to, or slightly
less than, the first number in the line.

2. If the receiver fails to track any satellites after a few

minutes of operation, see if you can improve this by
moving the receiver to a better place (a more open-sky
area) where there can’t be any doubt on the possibility for
a receiver to track satellites.