ashtech Z-Xtreme Operations & Reference Manual page 53

Table 4.9 Front Panel Warnings (continued)
Warning
Bad Base Coordinates
Bad RTCM Base
Position
†‡Not Enough
Satellites
Low Backup Battery
Antenna Overload
No Antenna Detected
MODEM
Communication Error
Operations
Definition
The position entered in the base
receiver for CPD operation is not
correct (too far from computed
position)
The position entered in the base
receiver for RTCM code operation
is not correct (too far from
computed position)
Tracking fewer than the minimum
number of satellites required for
kinematic survey
The battery powering the non-
volatile memory and the real-time
clock is low and needs to be
changed
Antenna installation problems, i.e.
the setup is drawing more than 150
milliamps (short on antenna cable
or LNA drawing too much current)
Does not sense any antenna:
WARNING, this will be the case if a
DC block is installed somewhere
between the receiver and the
antenna
Cannot communicate with the
modem
Action
• Base position was entered wrong on
the rover side. Reenter it.
• The mode in the base receiver was
set to not send BPS, set base to send
BPS ($PASHS, CPD,UBP,1).
• If rover is in "entered base station"
($PASH,CPD,UBP,O). Enter the base
position in the rover via
$PASHS,BPS,POS.
• If rover is in "receiver base position"
mode (default or
$PASHS,CPD,UBP,1), check link with
base.
• Make sure the base sends base
coordinates ($PASHS,BPS,PER,O)
Enter correct base position.
The kinematic survey must be
reinitialized on last point.
Contact Customer Support. Back-up
battery must be replaced.
Check antenna connection for bad
cable or bad LNA.
Check antenna connection for bad
cable or bad LNA. There may be
another receiver connected to the
same antenna with no DC block, or this
receiver is connected to the antenna
via a DC block.
Check serial connection to the modem.
Check power on modem. Check baud
rate of modem-it should match baud
rate of receiver. Reinitialize
modem.
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