
Error Handling
RTA stores log files in the RTALogs folder. If an error occurs, RTA creates an error log file called *Error.txt and
records the error.
Data Transfer
Throughout the run, RTA automatically copies data generated from raw image files to the output folder. If
image analysis lags, RTA stops processing and places the flow cell in a safe state. Processing resumes when
image data are available.
If RTA stops functioning, processing is automatically resumed during the next cycle at the appropriate point
on the flow cell. Do not restart RTA manually.
Data transfer is complete when a marker file called
Basecalling_Netcopy_complete.txt
is generated. One of
these files is generated for each read, and 1 is generated for the entire run.
Real-Time Analysis Workflow
Template generation
Maps cluster locations.
Registration and intensity
extraction
Records the location of each cluster on the flow cell and determines an intensity value
for each cluster.
Color matrix correction
Corrects cross talk between channels.
Empirical phasing
correction
Corrects the effects of phasing and prephasing.
Base calling
Determines a base call for every cluster.
Quality scoring
Assigns a quality score to every base call.
Template Generation
Template generation locates and defines the position of each cluster in a tile using X and Y coordinates. The
template is used as a reference for the subsequent step of registration and intensity extraction.
Because of the random array of clusters on the flow cell, template generation requires image data from the
first 5 cycles of the run. After the last template cycle for a tile is imaged, the template is generated.
Cluster positions are written to 1 cluster location (*.locs) file or compressed cluster location (*.clocs) file for
each tile. For more information, see
Registration and Intensity Extraction
Registration and intensity extraction begin after the template of cluster positions is generated.
u
Registration aligns the images produced over every cycle subsequent to template generation against the
template.
u
Intensity extraction determines an intensity value for each cluster in the template for a given image.
If registration fails for any images in a cycle, no base calls are generated for that tile in that cycle. Use SAV to
examine thumbnail images and identify images that failed registration.
Document # 15011190 v03
For Research Use Only. Not for use in diagnostic procedures.
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HiSeq 2000 System Guide