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User Guide
248
To measure the TE you have to configure the PTP pseudo-slave (Test) mode in your
test unit. Any clock reference input, including time, phase and frequency references are
compatible with the MTIE / TDEV test. Once the test unit is configured in pseudo-slave
mode, follow these steps:
1. From the Home panel, go to TEST,
The test configuration panel is displayed.
2. Go to PTP wander test.
3. Enable the MTIE / TDEV test by setting the Enable control to On.
4. Configure the Observation time, to one of the allowed values. The test finishes
automatically when the Observation time is reached.
5. Optionally, configure the packet selection filter through the Selection method,
Selection window length, Min. percentile and Max. percentile settings.
6. Optionally, configure the low pass filter by means the BW filter window control.
7. Configure the Mask source and Standard mask parameters for the next MTIE /
TDEV measurement.
The unit is now ready to run the test and read the results. To do that, this is the correct
procedure:
Standard • Masks for Synchronization Supply Unit (SSU) outputs.
These are the SSU G.823 / SSU EN 300 462-3-1, SSU
G.812 Noise Generation (CT), SSU G.812 Noise Genera-
tion (VT), SSU G.812 Noise Tolerance and SSU G.812
Noise Transfer.
• Masks for Ethernet Equipment Clock (EEC) interfaces:
EEC G.8261 (1), EEC G.8261 (2), SEC G.813 / EEC
G.8262 Constant Temperature (1), SEC G.813 / EEC
G.8262 Constant Temperature (2), SEC G.813 / EEC
G.8262 Noise tolerance (1), SEC G.813 / EEC G.8262
Noise tolerance (2), SEC G.813 Ref. sw. / EEC G.8262
Phase disc. (2), SEC G.813 / EEC G.8262 Variable tem-
perature (1).
• Masks for packet interfaces: PEC G.8261.1, PEC G.8263
Constant temperature, PEC G.8263 Variable temperature,
PTP G.8271.1 Reference point C, PRTC G.8272 Locked
mode, BC G.8273.2 dTE Constant temperature.
• Masks for enhanced clocks: ePRC G.811.1 and ePRTC
G.8272.1.
Pass / Fail results are computed by comparison of the test
results and the configured mask value
Table 9.10: Wander Test Configuration Parameters
Setting Description
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