Topcon PC-CDU - Figure 42. External Frequency Subtab

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of lock. The Static Mode checkbox is associated with the receiver pa-
rameter /par/raw/clp/static.
The receiver will take the above-described parameter into consideration only if the
receiver antenna is stationary and Enable Co-Op tracking is selected.
• The Bandwidth of individual PLL and Bandwidth of common PLL edit
boxes mean exactly what their names imply:
♦ Bandwidth of individual PLL is associated with the receiver parameter
/par/raw/clp/indband;
♦ Bandwidth of common PLL is associated with the receiver parameter
/par/raw/clp/comband.
Select the Enable L2 common loop checkbox to avoid the loss of L2 phase tracking in dy-
namic applications due to antenna rotation around its axis. The checkbox corresponds to the re-
ceiver parameter /par/raw/clp2/loop.
External Frequency
The settings on this subtab (Figure 42), allow the operator to configure the use of reference fre-
quency (it may be either high-stability external frequency or the receiver’s internal crystal oscilla-
tor).
Figure 42. “External Frequency” subtab
With the controls in the Source group, the user specifies the reference frequency input that the
receiver will use:
• Internal – means the receiver uses the internal oscillator.
• External – means the receiver uses an external frequency.
These radio buttons are associated with the receiver parameter /par/frq/input.