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SDM-300A Satellite Modem
A.1.4.1
AUPC
The AUPC function allows each of two modems in a closed link to control the output of
the other modem. Both modems must have the AUPC options enabled. These options are:
AUPC ENABLE
NOMINAL POWER
MINIMUM POWER
MAXIMUM POWER
TARGET NOISE
TRACKING RATE
LOCAL CL ACTION
REMOTE CL ACTION
With AUPC enabled on both modems (A and B), if modem A loses carrier:
1. Modem A sets its output power (MAXIMUM, MINIMUM, OR HOLD) as
2. Modem A then sends a "lost carrier" command to modem B.
3. Modem B sets its output power (MAXIMUM, MINIMUM, OR HOLD) as
4. Once modem A has reacquired the carrier, it sends commands to modem B to
Rev. 4
Enables the AUPC to function locally.
Output power level. Can be used for problem conditions, if chosen.
Sets minimum output power to be used.
Sets maximum output power to be used.
Desired E
/N
of the local modem.
b
0
Sets speed at which modems will adjust to output power.
Defines action that local modem will take if it loses carrier (Maximum,
Minimum, or Hold).
Defines action that local modem will take if remote modem reports carrier
loss (Maximum, Minimum, or Hold).
M O D E M A
specified by LOCAL CL ACTION.
specified by REMOTE CL ACTION.
achieve the desired E
/N
b
modem A to increase or decrease power to maintain modem B's target E
LINK
M O D E M B
. During this time, modem B sends commands to
0
Options
/N
.
b
0
A–21
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