@startuml
agent ptp_gm [
    PTP Grand Master
    (Endrun Ninja with PTP and PPS)
]
agent switch [
    ethernet switch (dumb)
]
agent dut [
    device under test
    (raspberry pi 4 with ptp-enabled networking)
]

agent scope [
    oscilloscope (Keysight DSOX1204G)
    measuring leading edge time delta
]

switch <--> ptp_gm : ethernet (ptp)
switch <--> dut : ethernet (ptp)
dut --> scope : pps (gpio)
ptp_gm --> scope : pulse signal\n(1Hz to 10Mhz)
@enduml