User's Manual

6051412900 Rev -
13
Setting Transmitter Output Power
The RF power is set through the following menu:
RF OUTPUT POWER
off low mid high max
The following table gives the RF power (real average COFDM power) corresponding to each setting, accompanied by the resulting
power supply consumption. (2 GHz shown)
Choice RF Power Power Consumption
OFF Muted Low (about 30 W)
LOW 25 mW Low (about 30 W)
MID 50 mW Low (about 30 W)
HIGH 100 mW Normal (about 40 W)
MAX 250 W Normal (about 40 W)
When the CARRY-CODER II is close to the receiving antenna (< 25m) you can try to reduce the RF output power to
MIN or MID level. It saves the batteries and can improve reception (avoiding receiver overload).
Setting Transmission Mode and Robustness
The CARRY-CODER II includes 3 pre-defined modes, characterized by defined transmission robustness.
These 3 pre-defined modes have been configured to provide the best trade-off between transmission robustness, video quality and
end-to-end delay for typical applications of the CARRY-CODER.
These modes can be selected through the following menu:
ROBUSTNESS
low mid high expert
The detailed characteristics of these modes are:
Mode (Tx Robustness) LOW MID HIGH EXPERT
COFDM Guard Interval 1/16 1/8 1/16
COFDM Constellation 64QAM 16QAM QPSK
COFDM Code Rate 1/2 ½ 1/2
Video bit rate (Mbps) 15.0 11.0 4.9
Audio bit rate (kbps/channel) 192 128 128
Resolution 720 x 576 720 x 576 720 x 576
GOP structure IP IP IP
GOP size 12 12 12
End to end delay (ms) 130 ms 130 ms 130 ms
As configured
individually
through the
“Expert” User
Mode
When changing to the < HIGH > robustness condition, take the following steps.
1. Select < HIGH > mode then press < OK >
2. Wait for the system to re-initialize then press < OK > once again.
Selecting EXPERT will not change any current settings. It will bring up the EXPERT Mode Menus.
The following table suggests which factory defined robustness mode to use for certain applications.