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GoLogicXL Time Stamp Limits

Transitional Timing

When 500 MHz or slower Transitional Timing mode or State analysis is used, a 32-bit counter records each sample's elapsed time. The maximum value for each timestamp counter is...

232 = 4,294,967,296

Time Per Sample at 500 MHz = 2 nanoseconds

Max Time Per Sample = 4,294,967,296 × 2 ns

Max Time Per Sample = 8,589,934,592 ns

Max Time Per Sample ≈ 8.589 seconds per sample

Max Time Span Per Trace Capture = Total Samples × Max Time Per Sample

Max Time Span (at 34M samples) = ≈ 9 Years Per Trace Capture

Max Time Span (at 67M samples) = ≈ 18 Years Per Trace Capture

Max Time Span (at 134M samples) = ≈ 36.6 Years Per Trace Capture

So even if the timestamp counter for every sample in the trace capture reaches its maximum value during a 34M sample trace, the total time-span still covers about 9 years of time.

Sampling at 500 MHz, the GoLogicXL captures all signal activity with 2 nanosecond resolution. The above figures demonstrate that relatively long periods of inactivity do not prevent capturing high-speed bursts of activity.

Of course, the maximum time per sample and maximum time per trace capture increases as the Transitional Timing sample rate is slowed.

1 GHz Transitional Timing Mode

When 1 GHz Transitional Timing mode is used, a 25-bit counter records each sample's elapsed time. The maximum value for each timestamp counter is...

225 = 33,554,432

Time Per Sample at 1 GHz = 1 nanosecond

Max Time Per Sample = 33,554,432 × 1 ns

Max Time Per Sample = 33,554,432 ns

Max Time Per Sample ≈ 0.034 seconds per sample

Max Time Span Per Trace Capture = Total Samples × Max Time Per Sample

Max Time Span (at 67M samples) ≈ 26 Days Per Trace Capture

Max Time Span (at 134M samples) ≈ 52 Days Per Trace Capture

Max Time Span (at 268M samples) ≈ 104 Days Per Trace Capture

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