Time and Clock

Local Clock Adjust

Makes small adjustments to the local clock of the test module, which drives the TX rate of the test ports.

Corresponding CLI command: M_CLOCKPPB

# Local Clock Adjust
await module.timing.clock_local_adjust.set(ppb=10)

resp = await module.timing.clock_local_adjust.get()
resp.ppb

Clock Sync Status

Get module’s clock sync status.

Corresponding CLI command: M_CLOCKSYNCSTATUS

# Clock Sync Status
resp = await module.timing.clock_sync_status.get()
resp.m_clock_diff
resp.m_correction
resp.m_is_steady_state
resp.m_tune_is_increase
resp.m_tune_value

Clock Source

Control how the test module timestamp clock is running, either freely in the chassis or locked to an external system time. Running with free chassis time allows nano-second precision measurements of latencies, but only when the transmitting and receiving ports are in the same chassis. Running with locked external time enables inter-chassis latency measurements, but can introduce small time discontinuities as the test module time is adjusted.

Corresponding CLI command: M_TIMESYNC

# Clock Source
await module.timing.source.set(source=enums.TimingSource.CHASSIS)
await module.timing.source.set_chassis()
await module.timing.source.set(source=enums.TimingSource.EXTERNAL)
await module.timing.source.set_external()
await module.timing.source.set(source=enums.TimingSource.MODULE)
await module.timing.source.set_module()

resp = await module.timing.source.get()
resp.source

Clock PPM Sweep Configuration

Important

For Freya modules only

Start and stop deviation sweep the local clock of the test module, which drives the TX rate of the test ports.

The sweep is independent of the M_CLOCKPPB parameter, i.e. the sweep uses the deviation set by M_CLOCKPPB as its zero point.

Corresponding CLI command: M_CLOCKPPBSWEEP

# Clock PPM Sweep Configuration
FREYA_MODULES = (modules.MFreya800G4S1P_a, modules.MFreya800G4S1P_b, modules.MFreya800G4S1POSFP_a, modules.MFreya800G4S1POSFP_b)
if isinstance(module, FREYA_MODULES):
    await module.clock_sweep.config.set(mode=enums.PPMSweepMode.OFF, ppb_step=10, step_delay=10, max_ppb=10, loops=1)
    await module.clock_sweep.config.set(mode=enums.PPMSweepMode.TRIANGLE, ppb_step=10, step_delay=10, max_ppb=10, loops=1)

    resp = await module.clock_sweep.config.get()
    resp.mode
    resp.ppb_step
    resp.step_delay
    resp.max_ppb
    resp.loops

Clock PPM Sweep Status

Return the current status of the M_CLOCKPPBSWEEP command.

Corresponding CLI command: M_CLOCKSWEEPSTATUS

# Clock PPM Sweep Status
if isinstance(module, FREYA_MODULES):
    resp = await module.clock_sweep.status.get()
    resp.curr_step
    resp.curr_sweep
    resp.max_steps