Comtech EF Data DMD50 Installation And Operation Manual page 231

DMD50 Universal Satellite Modem
There are safeguards built into the AUPC System. First, the modulator has two parameters,
which allow control of the maximum and minimum output power Levels. Second, a nominal, or
default, power level is specified which takes effect if the receive signal or messaging is lost.
This nominal power should be set to a level high enough to re-establish communications
regardless of rain fade.
EF AUPC, also provides some control over the rate of power change; while the Radyne and Near
Side AUPC use a optimized rate for rain fade compensation.
The AUPC Menu Functions and their descriptions are shown on Table G-1 ands G-2.
Function
AUPC MODE
NOMINAL POWER
MINIMUM POWER
MAXIMIM POWER
TARGET Eb/No
TRACKING RATE
LOCAL CL ACTION
REMOTE CL ACTION
1. The AUPC Menus are located under the Modulator Menu as shown in Section 4.
2. The EF AUPC Menu displays when EFAUPC Framing is enabled in the Demod and Mod set up menus.
3. Highlighted areas are activated when modem is set to EF AUPC
MN-DMD50– Revision 3
Table G-1. Local AUPC Functions
Local AUPC Functions
AUPC Available Options
DISABLE, NEARSIDE,
RADYNE, EFDATA
0 TO -25 dB
0 TO -25 dB
0 TO -25 dB
4.0 TO 16 dB
6.0 to 0.5 dB/MIN
HOLD, MAXIMUM, NOMINAL
HOLD, MAXIMUM, NOMINAL
Description
Enables/Disables the AUPC to
function locally
Sets default output power to be used
Sets minimum output power to be used
Sets maximum output power to be
Desired E /N of remote modem
b 0
Adjustable in .5dB increments
Allows user to determine what power
setting the remote modem will use in
the event of a carrier loss at the local
side.
This setting allows users to determine
what local output power setting to use
in the event that the remote end has a
carrier loss.
Strap Codes
G–3