Tektronix P6701B Mode D'emploi page 23

Operating Basics
Figure 5 illustrates a setup using the optical splitter and a P6723 O/E
converter to supply a digital trigger signal. Because of the consistent
and relatively large signal amplitude on the output of the P6723
converter, this technique provides a very precise and stable trigger.
TDS Series Digitizing oscilloscope
CH 1 input
P6701B or P6703B
Figure 5: Using the P6723 to supply a digital trigger signal
18
CH 2 input
P6723
P6701B, P6703B & P6723 Instructions
Device
under test
Output
3-port optical
splitter