Leica GR30 Online Help Manual page 111

Tracking settings
Cut-off angle
Code smoothing
Message on loss of lock
Oscillator
Oscillator
Fallback to internal oscillator
86
will be tracked with this setting, DGPS functionality is disabled
with this setting, as it cannot be guaranteed that the satellite for
DGPS is tracked when visible.
The assignment of SBAS satellite numbers to certain SBAS systems
is still subject to change. For the current list of PRN assignments go
to:
http://www.losangeles.af.mil/library/factsheets/factsheet.asp?id=8618
and select the L1 C/A PRN Code Assignment link.
Description
Enter the elevation cut off angle.
Select Smoothed or Not smoothed.
•
Smoothed: Carrier phase observations are used to smooth the code
pseudo-range in order to reduce multipath and ionospheric bias.
•
Not smoothed: Raw code pseudo-ranges are recorded.
Select the desired behaviour when a loss of lock occurs.
When checked, a message appears in the event log stating that a loss of lock has
occurred.
Description
An external oscillator can be used to provide a better quality time signal to the receiver
than that of the receiver's internal clock.
When using an external oscillator, the same external oscillator can be used for a
number of receivers, so that each receiver is guaranteed to be tracking satellites using
the same time signal.
An external oscillator is attached to the receiver via the OSC port.
Select Internal to use the receivers internal clock, or if an external oscillator is
connected to the oscillator port, select the type of external oscillator.
•
TCXO: A temperature compensated crystal oscillator (TCXO) is used.
•
OCXO: An oven controlled crystal oscillator (OCXO) is used.
•
Rubidium: A rubidium based external oscillator is used.
•
Cesium: A cesium based external oscillator is used.
•
H-maser: A hydrogen based external oscillator is used. The H-maser setting
can be used to set up a user defined external oscillator.
If an external oscillator is selected but not connected, the
receiver will not track any satellite signals.
Only available when an external oscillator is selected. When activated and the external
clock signal is not available for more than 5 minutes, the receiver will switch to the
internal clock.
Once the fall back has occurred, the oscillator icon in the Status/Tracking section of the
web interface will turn yellow
button will be displayed. This button allows checking if the external oscillator is
available again. When using this button, the receiver will check for a time signal from
. In addition, the Check/Revert to external oscillator