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--- code:work:spectrum1151:spectrumtiming:start [2016/04/28 22:06] – created david
+++ code:work:spectrum1151:spectrumtiming:start [2016/05/02 20:25] (current) – david
@@ Line 216: / Line 216: @@
   * Check the trigger value, it looks OK, but the one above it did miss 3, wonder if the values are one behind?
     * This one shows 13223 and 13222 but the next shot above 13219
+=== Experimental Data ===
+== Lowered Data Depth Testing ==
+  * Acquire Time ?
+Testing 130k versus 64k, I am finding the start digi and end digi indeed take half as long.
+<code>
+d=c130k.EVENTENDDIG - c130k.EVENTSTARTDIG
+print,mean( c130k.EVENTENDDIG - c130k.EVENTSTARTDIG ) * t2s
+.5787344e-05
+print,mean( c64k.EVENTENDDIG - c64k.EVENTSTARTDIG ) * t2s
+.3019777e-05
+</code>
+  * **lvisF_64k.dat.meta.bin** average is 33 uSecs Acquire Time
+  * **lvisF_130k.dat.meta.bin** average is 66 uSecs Acquire Time
+  * Transfer Time ?
+Looks to be that the event reset time is shifted by one sample.
+<code>
+d = shift(c130k.EVENTDIGRESTART,-2)- c130k.EVENTENDDIG
+print,mean(double(d(where(d LT 40000 AND d GT 1000))))  * t2s
+.00010969424  ; 110 usecs
+d = shift(c64k.EVENTDIGRESTART,-2)- c64k.EVENTENDDIG
+print,mean(double(d(where(d LT 20000 AND d GT 5000))))  * t2s
+.9933655e-05 ; 50 usecs
+</code>
+  * **lvisF_64k.dat.meta.bin** average is 50 uSecs DMA to PC Time
+  * **lvisF_130k.dat.meta.bin** average is 110 uSecs DMA to PC Time