Keysight EXG and MXG X-Series Signal Generators User’s Guide 265Basic Digital Operation (Option 653/655/656/657)Multiple Baseband Generator SynchronizationMultiple Baseband Generator SynchronizationAvailable in the Dual ARB menu, this feature lets you set up a master/slave system of up to sixteenKeysight MXG/EXGs so that the baseband generators (BBG) synchronize the playing of waveforms.The system count includes one Keysight MXG/EXG to function as the master (see “EquipmentSetup” on page 268).The MXG/EXG with Option 012, enables 2x2, 3x3, or 4x4 MIMO configurations to share a commonexternal LO signal to create phase coherent system. Refer to “Understanding Option 012 (LOIn/Out for Phase Coherency) with Multiple Baseband Generator Synchronization” on page 271and the Data Sheet.Figure 9-27 Multiple Baseband Generator Synchronization (BBG Synchronization) TriggerSoftkeys and Menu LocationFor details on each key, use key helpas described on page 40.Greys out for slave instruments.Remains active for the masterinstrument.see page 266BBG sync automatically changes the trigger type to Trigger and Run ifthe current setting is Free Run or Gated. If desired, manually setdifferently on either the master or slaves, or both either before or afterconfiguring the BBG sync setup parameters.Free Run and Gated are unavailable choices while using BBG sync.Master default settings. Ifdesired, change thesesettings after designating theinstrument as the masterSlave default settings. Thesesettings are not accessibleafter selecting an instrumentas a slave.Note: The BBG sync feature automatically configures the trigger settings shown below. To avoid a settings conflict error in thisprocess, manually configure the trigger settings prior to setting the BBG sync parameters shown on page 266.see page 189see page 219Neg is the factory default setting.The slave selection changes it toPos. If desired, manually change toPos prior to selecting as a slave.Note: A setting conflict error occurswhen at the time of the master/slaveselection, the following trigger setting(s)is true:Master• Free Run or Gated trigger typeSlave• Free Run or Gated trigger type• Ext Polarity Neg trigger source
