TrigDsply

Display raw data corresponding to a list of triggers.
TrigDsply displays the raw data corresponding to each selected trigger in an xml list. The displayed data may be pre-filtered with any of the filter types in the DMT signal processing library. The channel to be displayed defaults to the trigger sub-ID, but may be specified separately for each trigger type. The time interval displayed for each trigger starts at the specified trigger time and runs for the trigger duration. In addition the signal is shown for a specified "pad" time before and after the trigger epoch. The pad time used is the greates of a minimum pad time or a constant framction of the trigger duration. the minimum time and padding framction are specified in the TriDsply command line.

Running TrigDsply

The TrigDsply command line is as follows:

     TrigDsply -ttable <trigs> [-conf <cfile>] [-infile <frames>] \
                               [-mpad <tmin>] [-fpad <tfrac>] [+toc | -toc] \
			       [-outfile <ps-file>] [-sleep <secs>]
     
The arguments have the following meanings:

<cfile> Configuration file name.
<trigs> Ligo-lightweight (xml) format table of trigger to process.
<frames> List of files to be searched for the raw data frames.
<tmin> is the minimum paddding time to be used [0.25s].
<tfrac> default pad time as a fraction of the trigger duration [0.2].
<ps-file> Postscript output file.
<secs> Delay between successive trigger displays.

The following example displays selected raw data from a list of triggers in "trigs.xml" as selected by the configuration file in "trig_cf.cf". The raw data are serch for in the /qfs directory tree (i.e. the LDAS cache disks if running on decatur).

      TrigDsply -ttable trigs.xml -conf trig_cf.cf -infile '/qfs*\/frames/Data*\/\*.gwf'
     

The TrigDsply Configuration File

Configuration files are optional. If no configuration file is specified, the raw data corresponding to all triggers in the trigger tables are displayed without any pre-filtering.

The configuration file consists of filter specifiers and trigger selection and deselection statements. Each configuration statement is a single line. Comments start with a pound sign ('#'). The configuration statements start with one of the following keywords.

DeSelect Disable display of the specified trigger type.
Filter Specify a filter.
Select Enable display of a specified trigger type.

Deselect

The Deselect statement disables plotting of a specified trigger type. The deselection command has the following format:

     Deselect <trigger-id> <sub-id>
     
The Trigger-ID and Sub-ID fields may be specified as '*' to specify all values of that field.

Filter

The Filter statement specifies a filter that may be used to preprocess the raw data to be displayed. Filters are associated with individual triggers with the Select command. Each trigger type has a separate instance of the named filter with independent history data. The Filter command has the following format:

     Filter <name> <type> <parameters>
     

The implemented filter types are listed in the following table. Each entry is followed by a list of parameters need to define the filter.

BaseLine Average baseline suppression
P1: [optional] time constant [1.0]
Design Arbitrary filter design
P1: Sample rate
P2: FilterDesign class filter specifier in quotes
Difference Difference between adjacent samples
P1: Sample rate
IIRFilter Infinite impulse filter
P1: Sample rate
P2: List of poles (2*pi*f) in quotes
P3: List of zeros (2*pi*f) in quotes
MultiPipe Chain of filters
P1-PN: Names of filters to be used to form a pipeline

Select

The Select statement enables plotting of a specified trigger type. The Select command has the following format:

     Select { <trig-ID> | * } { <sub-id> | * } [-display <channel>] \
            [-filter <filter-name>] [-settle <settling-time>]
     
The raw data associated with the specified trigger type(s) are displayed. The channel specified by the trigger sub-ID is displayed unless the "-display" argument is specified. The raw data are filtered before being displayed if the optional "-filter" argument is specified.

Example configuration file

     #
     #    Configuration file to plot H2:LSC-AS_Q glitches prefiltered with
     #    a 4th order 100Hz high-pass IIR filter.
     #
     Filter HP16kHz100 IIRFilter 16384 "-474.906839355070  271.905402086509 \
                                        -474.906839355070 -271.905402086509 \
					-126.983988592287  426.388253881100 \
					-126.983988592287 -426.388253881100" \
				       "-0.00000000001095  31.82015846649922 \
				        -0.00000000001095 -31.82015846649922 \
					-0.00000000000763  76.58315106360777 \
					-0.00000000000763 -76.58315106360777"
     #
     Select Glitch H2:LSC-AS_Q  -filter HP16kHz100
     #
     

Author:
J. Zweizig
Version:
1.1; Last modified April 4, 2002

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