Comtech EF Data SLM-5650A Vipersat Parameter Editor - Manual (Page 38)

Vipersat
2-22 SLM-5650A Parameter Editor User Guide
Figure 2-14 Add TOS Rule dialog
When one or more rules that appear in the list are selected, the Remove and
Modify buttons become active.
The Clear button is used to clear all rules from the list.
DPC
Dynamic Power Control (DPC) is a Vipersat feature that acts to regulate the
transmit power of the Vipersat satellite modem, such that the specified receive
signal level (E
b
/N
0
) for the Vipersat unit(s) receiving the transmission is met.
DPC is driven by the receiver demod, which periodically notifies the transmit-
ting modem of the current E
b
/N
0
value that it is receiving.
The Dynamic Power Control dialog for a Hub or Remote operating in STDMA
mode is displayed in figure 2-15. Note that for an Expansion unit, only the first
three fields appear in the DPC dialog, and there is no Calibration menu item.
Before enabling DPC, the operator should verify that a demodulator at another
terminal is receiving from this modulator, and that there is a working communi-
cations channel from that receiving station back to the modulator terminal
(In-Band communications). Additionally, since DPC potentially controls the
full power range of the modulator’s output power, it is recommended that the
terminal be commissioned and calibrated before usage.
Tip: The DPC feature will not function unless the Outbound IP address is
defined in the STDMA dialog for the Hub BC modem. See page 2-14.