Commands
Chapter 4
WAAS G-III Reference Receiver User Manual Rev 1
45
4.4.1
AGCMODE
This command controls the automatic gain control (AGC) mechanism for the receiver. The AGC controls the
analog voltage of the down converted Radio Frequency (RF) signal sent to the Analog-to-Digital Converter
(ADC). Precise control of the voltage of the analog signal is required to optimize receiver tracking
performance. Setting this command to manual dictates the gain used to condition the input signal and may
degrade or prevent the receiver from acquiring or tracking all signals on a specified frequency.
Valid States
:
Configuration, Operational
Valid Modes
:
Normal
Acceptable Ports
:
Data
Syntax:
AGCMODE frequency mode [pulsewidth modulus]
Example:
AGCMODE L5 MANUAL 40 50
The
AGCMODE
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.
Field
Field Name
Description
Range
Precision
1
frequency
Specifies the signal type to which you want to apply
the command.
L1
L2
L5
N/A
2
mode
Specifies whether to use the default or custom
values for the pulse width and modulus.
Select AUTO to use the default values for pulsewidth
and modulus.
Select MANUAL to use custom values for pulsewidth
and modulus. When you select MANUAL, you must
enter values for pulsewidth and modulus.
auto
manual
N/A
3
pulsewidth
a
a. The pulsewidth value must be less than or equal to the modulus value.
VARF pulse width for manual mode.
This number has no effect when in auto mode.
[Optional]
35-262144
Ulong
4
modulus
a
VARF modulus for manual mode.
This number has no effect when in auto mode.
[Optional]
35-262144
Ulong