Cables to Go CDM-570L manual Target EbNo, Target Range, Speed Up EbNo

Vipersat Configuration

Target EbNo

The Target EbNo is the desired operating receive level for closed loop servo control. This is the value used by the receiving CDM-570/570L for comparison with the actual received Eb/No. This information is sent back to the transmitting terminal for output power level adjustment as necessary.

Enter T at the command prompt in the DPC Configuration screen to display the Target EbNo dialog shown in figure 3-57.The default value for this parame- ter is 10 dB.

Figure 3-57Target EbNo prompt

Target Range

The Target Range command sets the range on either side of the Target EbNo value, plus or minus, where the received level at the demodulator is acceptable and no adjustment to the output power of the transmitting terminal is necessary.

Enter R at the command prompt in the DPC Configuration screen to display the Target Range dialog shown in figure 3-58.The default value for this param- eter is 0.2 dB.

Figure 3-58Target Range prompt

Speed Up EbNo

Normally, the PLDM (Path Loss Data Multicast) is sent every 60 seconds from each terminal in the network. If the received Eb/No level at the demodulator drops below the Speed Up EbNo set value, the corresponding terminal increases its PLDM send rate to every 15 seconds until the receive level is greater than the set value. This provides a loop speed up to rapidly regain link quality.

3-42 Vipersat CDM-570/570L User Guide