Keysight 16860 Series Portable Logic Analyzer Service Guide 45
Testing 16860 Performance 3
Determine Maximum Data Rate for Multiple Clocks Mode
The multiple clocks test measures the maximum data rate of each of the four clocks used for this
mode: Pod1, Pod2, Pod3, Pod4. Each Pod / clock is measured separately. The measurement is done
in two parts:
• The first part is to determine the maximum clock rate that the analyzer will run at.
• The second part is to verify that the data captured by the analyzer is correct; markers are used to
verify the data patterns.
Pod 1 Clock - Maximum Clock Rate
For this test, Pod 1 clock should be connected to Channel 1 of the 81134A.
1Load the MultipleClocks_NoMarker.ala configuration file. If asked to save the current configuration
file, click No.
2 Verify that the Generator is set to 357 MHz as a starting point.
3Click the Run Repetitive toolbar button to start a repetitive run on the logic analyzer for
acquiring data repeatedly.
4 Acquired data will start appearing in the Listing window.
5 Start increasing the frequency on the pulse generator by 1 MHz increments while simultaneously
observing the logic analyzer data acquisition status.
6 Continue increasing the generator frequency until the logic analyzer displays an error that the
data could not be displayed, or the clock is too fast. It is possible that the error is caused by noise
introduced as the generator frequency is changed.
7 Without changing the frequency, clear the message by clicking OK. Then click the Run Repetitive
toolbar button to start a repetitive run again at the same frequency. Running at the same
frequency checks to see if the error message was caused by noise due to the changing of the
generator frequency.
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