Difference: AMC13DebugLog (62 vs. 63)

Revision 6321 Jun 2013 - DavidZou

Line: 1 to 1
 
META TOPICPARENT name="CmsSlhc"
Please log AMC13 test activity below, blog style (new entries at top)

2013-06-19, dzou, hazen

Changed:
<
<
  • Move probe to CLK output of ADN2814 CDS
>
>
  • Move probe to CLK output of ADN2814 CDS
 
  • Data on Sheet 6 of: ClockPhaseShift.xlsx
  • Height of roughly 200 ps (similar to after SY89872/ U4, see previous entry in log)
Line: 20 to 20
 

2013-06-17, dzou, hazen

Changed:
<
<
  • Move probe to LVDS pair between U3 and U4 on T1 (Fanout and divider chip) and repeat measurements.
>
>
  • Move probe to LVDS pair between U3 and U4 on T1 (Fanout and divider chip) and repeat measurements.
 
  • Typical exponential behavior of phase shift. Height of roughly 200 ps (after power off of 5 mins).
  • Data in Sheet 5 of: ClockPhaseShift.xlsx
Line: 32 to 32
 
  • Update TTT firmware and tested range of TTT SN 2: Found similar results as 2013-06-13 entry. AMC13 clock stops working at somewhere between 80 and 90 MHz. Lock lost at around 120 MHz.

  • Continuing Clock Phase Shift testing:
Changed:
<
<
    • Placed probe in clock path prior to the m-LVDS (T2 board -- U25 input @ R18) on SN 33
>
>
    • Placed probe in clock path prior to the m-LVDS (T2 board -- U25 input @ R18) 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)
Line: 43 to 43
 
Changed:
<
<
  • Moved probe to output of SFP receiver for TTC input (two vias next to U2 on T1).
>
>
  • Second probe location (independent from above) Moved probe to output of SFP receiver for TTC input (two vias next to U2 on T1).
 
  • Repeat power-cycle tests
  • See essentially no shift with power cycling
 
This site is powered by the TWiki collaboration platform Powered by PerlCopyright © 2008-2020 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback