VeEX RXT-6000e, User Manual

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16.3.3 CPRI Round Trip Delay
CPRI Standard Cable Delay Measurement reference points:
Toffset = Frame offset delay between Slave RX and Slave TX
T 1,4 = Frame delay between Master TX and Master RX
Cable Delay (round trip) = T 1,4 – Toffset
The figure below shows the definition of reference points for delay calibration (single-hop configuration):
Round trip delay Measurement procedure:
1. Slave Side: Start the test and note Toffset value
2. Master Side: Enter the Slave Toffset value using keypad
3. Master Side: Start the Test
4. Master Side: Note Cable Delay measurement min, max and current values
CPRI RTD
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16.3.4 SDT
Limit and Gate Time counters begin at the onset of the first valid event.
SDT Measurement ends after the Gate time is elapsed, to allow the capture of multiple smaller events.
The total time from the beginning of the first event to the end of the last event (within the Gate Time) is the reported SD time.
The measurement process is immediately restarted in search for the next trigger. Results are presented in tabular form (Events
table) indicating SD start time (1 ms resolution or better), disruption time, and Pass/Fail evaluation. This table gets populated as new
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