Setting Aupc Parameters; Target Eb/No; Max Range - Comtech EF Data CDM-600 Installation And Operation Manual

CDM-600 Satellite Modem
Automatic Uplink Power Control (AUPC)
12.2

Setting AUPC Parameters

1) The user, under the menu (CONFIG, MODE) first ensures that EDMAC is
2) The user should verify that the remote modem also has EDMAC framing
3) The user, under the menu (CONFIG, TX, POWER) sets the nominal output
4) The user will then select AUPC as the operating mode. At this point the user will
12.2.1

Target Eb/No

This is value of Eb/No that the user desires to keep constant at the remote modem.
If the Eb/No exceeds this value, the AUPC control will reduce the TX output power, but
will never drop below the nominal value set.
If the Eb/No 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
12.2.2

Max Range

This defines how much the modem is permitted to increase the output level, under AUPC
control.
•
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
selected. EDMAC may be selected as IDLE, or the unit may be defined as an
EDMAC Master or Slave. The important consideration is that EDMAC framing
should be enabled.
enabled.
power of the modem. This is done by selecting the MANUAL mode, then editing
the TX output power level displayed.
be prompted to define four key parameters:
12–2
Revision 7
MN/CDM600.IOM