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Commands
4.4.16 PLLDYNAMIC
The PLLDYNAMIC command can fundamentally change the way that the receiver operates. Do
not alter the default settings unless you are confident that you understand the consequences.
The channels are not reassigned when this command is issued. They may continue to track when
the command is applied. This is different than the G-II Reference Receiver PLLBW command,
which did reassign the channels, causing them to lose lock and resetting the lock time for all
tracking satellites to zero.
This command sets the low-pass filter bandwidth value. It also enables or disables the dynamic PLL tracking
and sets the parameters associated with dynamic PLL tracking.
The following restrictions apply to the PLLDYNAMIC command:
•
The highbw value must be larger than or equal to the lowbw value or the command will be
rejected.
•
The optional parameters are required fields when dynamic PLL is enabled (by specifying enable
for the setting field).
•
The locktime may not be reset to zero when the dynamic PLL is enabled through PLLDYNAMIC
command.
Valid States:
Valid Modes:
Acceptable Ports:
Syntax:
PLLDYNAMIC signal setting lowbw [highbw cno PLLerror timethreshold]
Example:
PLLDYNAMIC L1ca TRUE 3 10 30 0.15 2000
PLLDYNAMIC L5geo FALSE 1
Field
Field Name
1
signal
2
setting
WAAS G-III Reference Receiver User Manual Rev 1
Configuration, Operational
Normal
Data
Description
Signal type
Enter TRUE to enable dynamic PLL,
Enter FALSE to disable dynamic PLL.
When this field set to FALSE, the fields
marked as optional are not necessary and
are ignored if specified.
When this field set to TRUE, all of the fields
are mandatory.
Range
Precision
L1ca
L1geo
L1C
L2py
N/A
L2C
L5gps
L5geo
TRUE
N/A
FALSE
Chapter 4
65
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