Operating Manual Vol 1 - ES Documentation

SMIQDigital ModulationControl Lists:A CONTROL LIST can be created to generate control signals that have to be synchronous to themodulation symbols. The CONTROL LIST has a bit-by-bit layout. Six different control signals can befreely programmed. The CONTROL LIST can be created such that entries are only made at thosesymbol positions where a control signal is changed. The length of the CONTROL LIST is determined bythe symbol number of the last entry and can differ from that of the DATA LIST.SELECT LIST...CLIST0EDIT CONTROL LISTCOPY DELETE EDIT|VIEW-SYMBOL-----------BGATE-LATT--CW----HOP---TRIG2-TRIG1--00000001 1 0 0 0 0 100000157 1 1 0 0 1 000000313 0 1 0 0 0 000001249 0 1 0 1 0 000001250 0 1 0 0 0 0Fig. 2-52CONTROL LIST for control signalsSignals BGATE (Burst Gate) and LATT (Level Attenuation) are used for envelope control. Envelopecontrol with these signals is switched on by selecting SOURCE-CONTROL STATE ON and POWERRAMP CONTROL - SOURCE INT.Digital modulation can be switched off by the CW (Continuous Wave) signal. HOP (Hopping) is a triggersignal for frequency hopping (compare with section 'List Mode').TRIG 1 and TRIG 2 (Trigger Output 1 and 2) can be used to generate synchronization signals such asframe clocks, start markers of a PRBS sequence or a special modulation symbol.Signals BGATE, LATT, HOP and CW are used internally by SMIQ but not signals TRIG 1 and TRIG 2.All the control signals are available at the PAR DATA interface at the rear of SMIQ.The data sequences stored in the data generator can be run repetitively (TRIGGER MODE AUTO).Moreover, trigger signals can be used for synchronized sequences. Trigger signals can be fed in via theTRIGIN input at connector PAR DATA. A trigger event can be initiated manually byEXECUTE TRIGGER. A trigger signal is generated upon the trigger event at the output TRIGOUT 3.After a trigger event, the data generator starts to output modulation data from the active list starting withbit 1. In case of external triggering, the start can be delayed by a selectable number of symbols (EXTTRIGGER DELAY). Retriggering (RETRIG) can be inhibited for a selectable number of symbols (EXTTRIGGER INHIBIT).1125.5555.03 2.93E-9