Difference: AMC13DebugLog (52 vs. 53)

Revision 5314 Jun 2013 - DavidZou

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META TOPICPARENT name="CmsSlhc"
Please log AMC13 test activity below, blog style (new entries at top)
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2013-06-14 dzou

  • Continuing Clock Phase Shift testing
  • Placed probe in clock path prior to the m-LVDS (will add specifics soon) on SN 33
  • Observed a unexpected phase behavior when changing amplitude of AWG:
    • Shifting from 900mV peak to peak to 600mV cause the signals (AWG and probe) to go out of phase and stay there even after returning to 900mV. (delay of roughly 9.58 ns)
    • Shifting back down to 600 mV puts it back in phase again. (delay of roughly 3.38 ns)
    • (will include screen shots if necessary)
  • Continued testing with settings described in 2013-06-11 entry
 

2013-06-13 dickens

  • AMC13XG and TTT frequency range tests:
    • Found the upper limit of clock frequency manageable by AMC13XG to be 85.1 MHz. Periodic "gaps" of constant amplitude voltage appear in the AMC13XG signal thereafter. These gaps become more frequent as the clock frequency increases.
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2013-06-11 dzou, hazen

  • Measuring TTC Clock Phase Shift - Notes on Setup:
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    • Using Agellant AWG 40 MHz 90mV peak to peak output as external clock
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    • Using Agellant AWG 40 MHz 900mV peak to peak output as external clock
 
    • AWG connect by 2 ft onto T on channel 4 of oscilloscope (LeCroy 725 ZI 2.5 GHz)
    • 4ft long cable from T to external clock to TTT
    • D310 differential probe soldered to FClkA on AMC13 at backplane connector w/ 100 ohm between the pair
 
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