Product specifications

CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® Revision 7
Automatic Uplink Power Control (AUPC) MN/CDMQX.IOM
8–2
4. The user will then select AUPC as the operating mode.
At this point the user will be prompted to define four key parameters: AUPC Target E
b
/N
0
;
AUPC Max Range; AUPC Alarm; and Demod Unlock.
8.2.1 AUPC Target E
b
/N
0
TARGET E
b
/N
0
is value of E
b
/N
0
that the user desires to keep constant at the remote modem.
If the E
b
/N
0
exceeds this value, the AUPC control will reduce the Tx output power, but will never
drop below the nominal value set.
If the E
b
/N
0
falls below this value, the AUPC control will increase the Tx output power, but will
never exceed the value determined by the parameter MAX RANGE.
• The minimum value the user can enter is 0.0 dB
• The maximum value the user can enter is 9.9 dB
• The default value is 3.0 dB
• The resolution is 0.1 dB
8.2.2 AUPC Max Range
MAX RANGE defines how much – under AUPC control – the modem is permitted to increase
the output level.
• The minimum value the user can enter is 0 dB
• The maximum value the user can enter is 9 dB
• The default value is 1 dB
• The resolution is 1 dB
8.2.3 AUPC Alarm
The ALARM parameter defines how – under AUPC control – the user wants the modem to
react if the maximum power limit is reached.
The two choices are:
• NONE (no action – this is the default setting).
• TX ALARM (generate a Tx alarm).
8.2.4 Demod Unlock
DEMOD UNLOCK defines the action the modem will take if the remote demodulator loses lock.
The two choices are:
• NOMINAL (reduce the Tx Output Power to the nominal value – this is the default
setting).