Global

Tab. Function IEEE 1588/PTPv2 BC

Parameters

Meaning

Possible values

Default setting

Priority 1

The clock with the lowest priority 1 becomes the reference clock (grandmaster).

0-255

128

Priority 2

If all the relevant values for selecting the reference clock are the same for multiple devices, the clock with the lowest priority 2 is selected as the reference clock (grandmaster).

0-255

128

Domain Number

Assignment of the clock to a PTPv2 domain. Only clocks with the same domain are synchronized.

0-255

0


Tab. IEEE 1588/PTPv2 BC Status

Parameters

Meaning

Possible values

Default setting

Two-Step

Displays the device's clock mode

Off (select v2‑boundary-clock-onestep in PTP Global dialog)

On (select v2‑boundary-clock-twostep in PTP Global dialog)

 

Steps Removed

Number of boundary clocks between this device and the PTP reference clock.

Offset to Master [ns]

Deviation of the local clock from the reference clock in nanoseconds.

Delay to Master [ns]

Single signal runtime (end-to-end) between the local device and reference clock in nanoseconds.

Prerequisite: The slave port's runtime mechanism is set to E2E.


Tab. PTP Clock Identities

Parameters

Meaning

Possible values

Default setting

Clock identifty

Own device UUID (unique identification number)

Parent Port identity

Port UUID of the direct master

Grandmaster identity

Device UUID of the reference clock


Note: PTPv2 uses as the device UUID 64 bits, consisting of the device's MAC address, between whose No. 3 and No. 4 bytes the values ff and fe are added.
A port UUID consists of the device UUID followed by a 16-bit port ID.
The device displays UUIDs as a byte sequence in hexadecimal notation.

Tab. Grandmaster (reference clock)

Parameters

Meaning

Possible values

Default setting

Priority 1

Display priority 1 of the current reference clock.

Priority 2

Display priority 2 of the current reference clock.

Class

Class of the reference clock

Precision

Estimated accuracy with regard to the UTC, indicated by the reference clock (the Grandmaster).

Variance

Variance as described in the IEEE 1588-2008 standard


Tab. Properties of the local time

Parameters

Meaning

Possible values

Default setting

Time source

Source selected for own clock.

atomicClock

gps

terrestrialRadio

ptp

ntp

handset

other

internalOscillator

internalOscillator

UTC Offset [s]

Current difference between the PTP time scale (see below) and the UTC.

-32768 to 32767

35 (since 2012‑07‑01)

UTC Offset valid

Specifies whether value of UTC offset is valid or not.

Yes

No

No

Time Traceable

The device gets the time from a primary UTC reference, e.g. from an NTP server.

Yes

No

Frequency Traceable

The device gets the frequency from a primary UTC reference, e.g. NTP server, GPS.

Yes

No

PTP Time Scale

The device uses the PTP time scale. According to IEEE 1588, the PTP time scale is the TAI atomic time started on 01.01.1970. In contrast to UTC, TAI does not use leap seconds. On 01.01.2009, the difference between UTC and TAI was +34 seconds.

Yes

No