Transition Networks
S4224 Web User Guide
33558 Rev. C
Page 353 of 669
Note
: at S4224 v 1.0.2, PTP is available over Ethernet and IPv4 only. PTP under IPv6 will be supported
at a future release.
Note
: you must have a PTP clock instance configured for accurate RFC 2544 Latency
test step timestamps. PTP must be running on both devices to synchronize the Time of Day.
External I/O Configuration
Port
SMB Port and direction (
IEEE 1588 Input
and
IEEE 1588 Output
).
State
Enable or Disable the SMB port. These values are possible:
Enable
the port.
Disable
the port.
Frequency
Set the Clock Frequency. The following values are possible for input: 1 PPS, 8 KHz, 64 KHz,
1.544 MHz, 2.048 MHz, 10 MHz, 19.44 MHz, or 25 MHz.
The output range is 1-25,000,000 Hz.
For best accuracy, output frequencies should be either:
1) A factor of 250,000,000, or
2) One of the following special frequencies: 64 KHz, 1.544 MHz, 2.048 MHz.
External I/O Options
Impedance
Select the impedance termination of the port. These values are possible:
50
Ohms: 50 Ohms impedance.
75
Ohms: 75 Ohms impedance.
Hi-Z
: no impedance termination driven, "tri-stated" or "floating".