Maher started the modulator

9h50 HV is on

09h53 Beam is in the ring w/o RF

10h30 Beam is in the ring with RF

The network is extremly slow on client 1. Impossible to start terminal or execute the commands. Client 2 is slow but still works. 

11h15 Beam is in the ring with RF at good frequency. Rigol is working properly. Thanls to Nicolas.