System Operation
Configuring AGC Threshold
OceanTRx
TM
4-500 Installation and Operations Manual
8-29
4. In the
Timeout (min)
field, enter the number of minutes after which the system will
automatically reboot if it fails to engage the defined operating mode.
5. Click
Ok (Enter)
. The
Restart Mode
dialog box closes.
NOTE:
For normal system operation, the restart mode should be set to
Acquire
.
8.8
Configuring AGC Threshold
When not using Noise Floor correction (in which case the default threshold is -75dBm),
the AGC (tracking signal level) threshold can be configured. When the received tracking
signal falls below the threshold level, the system automatically moves to
Search Mode
.
NOTE: Can be modified according to strength of satellite signal (raised if signal is higher, lowered if
satellite signal is weaker). Commands
– set Threshold should be at least 8dbm between threshold and
nominal AGC
To configure the AGC threshold level
1. Open the
Commands
menu from the
Operation Screen
and select
Set Threshold
.
The
Set Threshold Level
dialog box appears.
Figure
8-27: Set Threshold Level Dialog Box
2. Enter a new value in the
Threshold Level, dBm
field, according to the following
guidelines:
The threshold level should be at least 6dB higher than the off-satellite noise
background. To check the off-satellite noise, move the antenna away from the
satellite (for example, by activating Stow Mode) and check the AGC level.
The threshold level should be lower than the selected tracking signal level. It is
recommended to not be more than the selected tracking signal by 7dB.
The threshold should be set at a minimum of -75dBm.
NOTE:
You can also configure the threshold level in the relevant Step-Track Mode configuration
dialog box, accessed from the
Operating Modes
sub-menu of the
Config
menu.
