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Chapter 5
5.3
Command Reference
All syntax strings and command examples given in this section are in the Abbreviated ASCII format, unless
otherwise indicated. The tables provided show the fields necessary for all formats unless otherwise noted.
As mentioned in Section 4.1 on Page 34, all command strings must be followed by
5.3.1
AGCMODE Control Automatic Gain Control
1.
This 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.
2.
When the AGC mode is disabled, the Receiver Status word in the message header, discussed in
Table 45, Receiver Status on Page 95, reports the AGC as GOOD as long as the control metric used in
the feedback loop is within 7.5% of the set point.
This command controls the EuroPak-15ab's Automatic Gain Control (AGC) mechanism, which has two
primary functions:
•
To perform the analog-to-digital conversions in the receiver's front end.
•
Mitigate jamming.
48
Table 15: Frequency Values for AGCMODE Command
ASCII
L1
L1 GPS and Galileo channels
L5
L5 GPS and E5a Galileo channels
E5b
E5b Galileo channels
a. Changing GPS L1 affects Galileo L1 and
changing GPS L5 affects Galileo E5a
Table 16: AGC Mode Values
ASCII
Specifies that the default pulse width
AUTO
and load values should be used.
Specifies that the values specified in the
MANUAL
pulsewidth and loadvalue fields should
be used.
Description
a
a
Description
EuroPak-15ab Receiver User Manual Rev 1
Commands
.
<Enter>
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