= VMEDAQ Histograms =
[[image/vmegui-histograms.png|{{attachment:vmegui-histograms-thm.png|VMEGUI Histograms Panel}}]]

Detailed description of Histograms for VMEDAQ build 1949.

||<:-2 tablewidth="100%">'''General'''||
||<width="30%">Event Size||Distribution of event data size, 32-bit words. Displayed also on ''RUN'' tab.||
||Burst Size History||Evolution of number of events in burst. Number of events in current burst is displayed as bin 0, in previous burst - as bin 1, etc.||
||Debug histogram||* Just for debugging.||

||<:-2 tablewidth="100%">'''DCH, DCH2 (Drift Chambers)'''||
||<width="30%">DCH window counts||Number of pulses vs. time window, all events accumulated||
||DCH channels||* Number of pulses vs. readout channel||
||DCH mapped channels||Number of pulses vs. DCH channel||
||DCH cards||* Number of pulses vs. readout cards||

||<:-2 tablewidth="100%">'''Trigger'''||
||<width="30%">Trigger input count (all)||Direct count of input pulses, including dead time||
||Trigger bits||Input pulse count that give the trigger condition (readout data, not counted in dead time)||
||Trigger states||Trigger logic state counts (readout data, not counted in dead time)||
||Event Distance, us||Time between adjacent events in microseconds||

||<:-2 tablewidth="100%">'''TDC'''||
||<width="30%">TDC NHits||Number of hits in event||
||TDC Hits by Channel||Number of hits vs. channel number||
||TDC Input Counts by Channel||temporarily disabled||
||TDC RAW Time||* Hit timestamp in bins. Bit resolution depends on setup.||
||TDC Time, ns||Hit timestamp in nanoseconds. Hit timestamp is relative to trigger coarse time (25 ns step)||
||TDC Start-0 Stop-All Time, ns||First hit in channel 0 is used for common start, all other hits are used for stop. Start-Stop time is measured in nanoseconds.||
||TDC Pulse Width, ns||Pulse width in nanoseconds, available in ''Pair mode'' only||
||TDC Error Bits||Diagnostic bit count. For detailed description of error bits please refer to HPTDC manual.||

||<:-2 tablewidth="100%">'''TQDC'''||
||<width="30%">TQDC NHits T||Number of time measurements in event||
||TQDC NHits Q||Number of charge measurements in event||
||TQDC NHits T - NHits Q, != 0||Difference in number of time and charge measurements. Large value (compared to NHits) is a signal of lost measurements due to overflow.||
||TQDC RAW Hits||*||
||TQDC T Channels||Time measurements vs. input channel||
||TQDC Q Channels||Charge measurements vs. input channel||
||TQDC Channels: SumQ||Accumulated charge vs. channel||
||TQDC Channels: SumQ RAW||*||
||TQDC RAW Time||*||
||TQDC Double-Pulse RAW Time||*||
||TQDC Time, ns||Hit timestamp relative to coarse trigger time||
||TQDC Double-Pulse Time, ns||Time difference distribution between first and second pulses on any channel found in single event. Useful for two-channel lab measurements||
||TQDC DLL Time||* Distribution of Lower 5 bits of hit raw timestamp, used for HPTDC DLL tap calibration||
||TQDC RC Time||* HPTDC RC delay calibration, ''Very High Resolution'' (25 ps) mode only||
||TQDC Charge||Charge (sum of ADC samples) vs. input channel||
||TQDC TS||*||
||TQDC T-Q Time||*||
||TQDC Trig TS||*||
||TQDC Hit TS||*||

Histograms marked * above are for engineering and hardware diagnostic purposes and are subject to change.