User`s guide

18 User’s and Service Guide Supplement
E4438C Option HEC
Repeatable Triggering for Multiple Baseband Sources
3. Select ARB Setup > More (1 of 3) > More (2 of 3) > VCO CLOCK Ext > [Return] ARB
“On.” Refer to Figure 13.
4. Align the DACs:
[Mode] Dual ARB > ARB Setup > More (1 of 3) > More (2 of 3) > Align DAC
5. Adjust the trigger level control on the oscilloscope for a stable display.
Figure 13 Multi-source I and Q Output
This completes the configuration for connecting multiple instruments for synchronizing
the timing relationship of the output.