Spectrum digitizerNETBOX DN2.44 Series Hardware Manual page 7

Mode Gated Sampling ................................................................................................... 129
Acquisition modes ............................................................................................................................................................ 129
Standard Mode.......................................................................................................................................................... 129
FIFO Mode ................................................................................................................................................................ 129
Limits of pre trigger, post trigger, memory size ..................................................................................................................... 130
Gated Sampling and Timestamps ................................................................................................................................. 130
Trigger............................................................................................................................................................................ 131
Detailed description of the external analog trigger modes ............................................................................................... 131
Channel triggers modes .............................................................................................................................................. 135
Programming examples..................................................................................................................................................... 140
Mode Boxcar Average (High-Resolution)........................................................................ 141
Overview ........................................................................................................................................................................ 141
General Information.................................................................................................................................................... 141
Principle of operation.................................................................................................................................................. 141
Simplified Block Diagram ............................................................................................................................................ 142
Setting up the Acquisition ............................................................................................................................................ 142
Recording modes ............................................................................................................................................................. 143
Standard Mode.......................................................................................................................................................... 143
FIFO Mode ................................................................................................................................................................ 143
Limits of pre trigger, post trigger, memory size ..................................................................................................................... 143
Trigger Modes ................................................................................................................................................................. 144
Output Data Format.......................................................................................................................................................... 144
Data organization ............................................................................................................................................................ 144
Programming examples..................................................................................................................................................... 145
Mode 8bit Storage (Low-Resolution) .............................................................................. 146
Overview ........................................................................................................................................................................ 146
Available acquisition modes .............................................................................................................................................. 146
Enabling hardware data conversion ................................................................................................................................... 146
Sample format ................................................................................................................................................................. 146
Limits of pre trigger, post trigger, memory size ..................................................................................................................... 147
Converting ADC samples to voltage values.......................................................................................................................... 147
Timestamps ................................................................................................................... 148
General information ......................................................................................................................................................... 148
Example for setting timestamp mode: ............................................................................................................................ 148
Timestamp modes............................................................................................................................................................. 149
Standard mode .......................................................................................................................................................... 149
StartReset mode.......................................................................................................................................................... 149
Refclock mode............................................................................................................................................................ 149
Reading out the timestamps ............................................................................................................................................... 150
General..................................................................................................................................................................... 150
Data Transfer using DMA ............................................................................................................................................ 151
Data Transfer using Polling .......................................................................................................................................... 153
Comparison of DMA and polling commands.................................................................................................................. 153
Data format ............................................................................................................................................................... 153
Combination of Memory Segmentation Options with Timestamps ........................................................................................... 155
Multiple Recording and Timestamps .............................................................................................................................. 155
Example Multiple Recording and Timestamps ................................................................................................................. 155
ABA Mode and Timestamps......................................................................................................................................... 155
ABA mode (dual timebase) ............................................................................................ 157
General information ......................................................................................................................................................... 157
Standard Mode.......................................................................................................................................................... 157
FIFO Mode ................................................................................................................................................................ 158
Limits of pre trigger, post trigger, memory size ..................................................................................................................... 158
Example for setting ABA mode: .................................................................................................................................... 159
Reading out ABA data ...................................................................................................................................................... 159
General..................................................................................................................................................................... 159
Data Transfer using DMA ............................................................................................................................................ 160
Data Transfer using Polling .......................................................................................................................................... 162
Comparison of DMA and polling commands.................................................................................................................. 162
ABA Mode and Timestamps......................................................................................................................................... 163
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