How to improve speed of data acquisition? Help needed urgently.

I want to convert analog signals to digital signals and simultaneously perform some search on the data acquired and this whole process has to be done continuously for few hours.
So I tried writing two programs in Matlab, one acquires the analog data and converts it to digital and saves the data in small chunks on hard disk (like file1, file2, file3,...) continuously. The other program performs the search operation in those chunks of data continuously. I run both the programs at a time by opening two mat lab windows.
But the problem Iam facing is that the data acquisition is slow. As a result I get an error message in the second program saying that
"??? Error using ==> load
Unable to read file file4.mat: No such file or directory."
Iam unable to synchronize the two programs. I cannot use timers in search program because I cannot add any delays.
Iam using a NI PCI-6036E ,16 Bit Resolution ,200 KS/s Sampling Rate A/D board.
Should I switch to some other series such as M series having sampling rate of the order MS/s?
Can anyone please tell me how to improve the speed of data acquisition?
Thanks.

Gayathri wrote:
I want to convert analog signals to digital signals and simultaneously perform some search on the data acquired and this whole process has to be done continuously for few hours.
So I tried writing two programs in Matlab, one acquires the analog data and converts it to digital and saves the data in small chunks on hard disk (like file1, file2, file3,...) continuously. The other program performs the search operation in those chunks of data continuously. I run both the programs at a time by opening two mat lab windows.
But the problem Iam facing is that the data acquisition is slow. As a result I get an error message in the second program saying that
"??? Error using ==> load
Unable to read file file4.mat: No such file or directory."
Iam unable to synchronize the two programs. I cannot use timers in search program because I cannot add any delays.
Iam using a NI PCI-6036E ,16 Bit Resolution ,200 KS/s Sampling Rate A/D board.
Should I switch to some other series such as M series having sampling rate of the order MS/s?
Can anyone please tell me how to improve the speed of data acquisition?
Thanks.
Hi gayathri,
well my email is [email protected]
if ur from india mail me back.
Regards
labview boy

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Version:       'X64/LIX86 7.6.03   Build 007-123-157-515'
Version:       'FAST'
Machine:       'x86_64'
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ID     MODE     CONFIGUREDSIZE     USABLESIZE     USEDSIZE     USEDSIZEPERCENTAGE     DROPVOLUME     TOTALCLUSTERAREASIZE     RESERVEDCLUSTERAREASIZE     USEDCLUSTERAREASIZE     PATH
1     NORMAL     4194304          4194288          379464          9               NO          0               0               0               /db/SPDT/data/data01.dat
2     NORMAL     4194304          4194288          380432          9               NO          0               0               0               /db/SPDT/data/data02.dat
3     NORMAL     4194304          4194288          379184          9               NO          0               0               0               /db/SPDT/data/data03.dat
4     NORMAL     4194304          4194288          379624          9               NO          0               0               0               /db/SPDT/data/data04.dat
5     NORMAL     4194304          4194288          380024          9               NO          0               0               0               /db/SPDT/data/data05.dat
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ID     CONFIGUREDSIZE     USABLESIZE     PATH               MIRRORPATH
1     51200          51176          /db/SPDT/log/log01.dat     ?
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KERNELVERSION                         KERNEL    7.6.03   BUILD 007-123-157-515
INSTANCE_TYPE                         OLTP
MCOD                                  NO
_SERVERDB_FOR_SAP                     YES
_UNICODE                              NO
DEFAULT_CODE                          ASCII
DATE_TIME_FORMAT                      ISO
CONTROLUSERID                         DBM
CONTROLPASSWORD
MAXLOGVOLUMES                         2
MAXDATAVOLUMES                        11
LOG_VOLUME_NAME_001                   /db/SPDT/log/log01.dat
LOG_VOLUME_TYPE_001                   F
LOG_VOLUME_SIZE_001                   6400
DATA_VOLUME_NAME_0005                 /db/SPDT/data/data05.dat
DATA_VOLUME_NAME_0004                 /db/SPDT/data/data04.dat
DATA_VOLUME_NAME_0003                 /db/SPDT/data/data03.dat
DATA_VOLUME_NAME_0002                 /db/SPDT/data/data02.dat
DATA_VOLUME_NAME_0001                 /db/SPDT/data/data01.dat
DATA_VOLUME_TYPE_0005                 F
DATA_VOLUME_TYPE_0004                 F
DATA_VOLUME_TYPE_0003                 F
DATA_VOLUME_TYPE_0002                 F
DATA_VOLUME_TYPE_0001                 F
DATA_VOLUME_SIZE_0005                 524288
DATA_VOLUME_SIZE_0004                 524288
DATA_VOLUME_SIZE_0003                 524288
DATA_VOLUME_SIZE_0002                 524288
DATA_VOLUME_SIZE_0001                 524288
DATA_VOLUME_MODE_0005                 NORMAL
DATA_VOLUME_MODE_0004                 NORMAL
DATA_VOLUME_MODE_0003                 NORMAL
DATA_VOLUME_MODE_0002                 NORMAL
DATA_VOLUME_MODE_0001                 NORMAL
DATA_VOLUME_GROUPS                    1
LOG_BACKUP_TO_PIPE                    NO
MAXBACKUPDEVS                         2
LOG_MIRRORED                          NO
MAXVOLUMES                            14
LOG_IO_BLOCK_COUNT                    8
DATA_IO_BLOCK_COUNT                   64
BACKUP_BLOCK_CNT                      64
_DELAY_LOGWRITER                      0
LOG_IO_QUEUE                          50
_RESTART_TIME                         600
MAXCPU                                8
MAX_LOG_QUEUE_COUNT                   0
USED_MAX_LOG_QUEUE_COUNT              8
LOG_QUEUE_COUNT                       1
MAXUSERTASKS                          500
_TRANS_RGNS                           8
_TAB_RGNS                             8
_OMS_REGIONS                          0
_OMS_RGNS                             7
OMS_HEAP_LIMIT                        0
OMS_HEAP_COUNT                        8
OMS_HEAP_BLOCKSIZE                    10000
OMS_HEAP_THRESHOLD                    100
OMS_VERS_THRESHOLD                    2097152
HEAP_CHECK_LEVEL                      0
_ROW_RGNS                             8
RESERVEDSERVERTASKS                   16
MINSERVERTASKS                        28
MAXSERVERTASKS                        28
_MAXGARBAGE_COLL                      1
_MAXTRANS                             4008
MAXLOCKS                              120080
_LOCK_SUPPLY_BLOCK                    100
DEADLOCK_DETECTION                    4
SESSION_TIMEOUT                       180
OMS_STREAM_TIMEOUT                    30
REQUEST_TIMEOUT                       5000
_IOPROCS_PER_DEV                      2
_IOPROCS_FOR_PRIO                     0
_IOPROCS_FOR_READER                   0
_USE_IOPROCS_ONLY                     NO
_IOPROCS_SWITCH                       2
LRU_FOR_SCAN                          NO
_PAGE_SIZE                            8192
_PACKET_SIZE                          131072
_MINREPLY_SIZE                        4096
_MBLOCK_DATA_SIZE                     32768
_MBLOCK_QUAL_SIZE                     32768
_MBLOCK_STACK_SIZE                    32768
_MBLOCK_STRAT_SIZE                    16384
_WORKSTACK_SIZE                       8192
_WORKDATA_SIZE                        8192
_CAT_CACHE_MINSIZE                    262144
CAT_CACHE_SUPPLY                      131072
INIT_ALLOCATORSIZE                    262144
ALLOW_MULTIPLE_SERVERTASK_UKTS        NO
_TASKCLUSTER_01                       tw;al;ut;2000*sv,100*bup;10*ev,10*gc;
_TASKCLUSTER_02                       ti,100*dw;63*us;
_TASKCLUSTER_03                       equalize
_DYN_TASK_STACK                       NO
_MP_RGN_QUEUE                         YES
_MP_RGN_DIRTY_READ                    DEFAULT
_MP_RGN_BUSY_WAIT                     DEFAULT
_MP_DISP_LOOPS                        2
_MP_DISP_PRIO                         DEFAULT
MP_RGN_LOOP                           -1
_MP_RGN_PRIO                          DEFAULT
MAXRGN_REQUEST                        -1
_PRIO_BASE_U2U                        100
_PRIO_BASE_IOC                        80
_PRIO_BASE_RAV                        80
_PRIO_BASE_REX                        40
_PRIO_BASE_COM                        10
_PRIO_FACTOR                          80
_DELAY_COMMIT                         NO
_MAXTASK_STACK                        512
MAX_SERVERTASK_STACK                  500
MAX_SPECIALTASK_STACK                 500
_DW_IO_AREA_SIZE                      50
_DW_IO_AREA_FLUSH                     50
FBM_VOLUME_COMPRESSION                50
FBM_VOLUME_BALANCE                    10
_FBM_LOW_IO_RATE                      10
CACHE_SIZE                            262144
_DW_LRU_TAIL_FLUSH                    25
XP_DATA_CACHE_RGNS                    0
_DATA_CACHE_RGNS                      64
XP_CONVERTER_REGIONS                  0
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MAXPAGER                              64
SEQUENCE_CACHE                        1
_IDXFILE_LIST_SIZE                    2048
VOLUMENO_BIT_COUNT                    8
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JOIN_MAXTAB_LEVEL9                    5
_READAHEAD_BLOBS                      32
CLUSTER_WRITE_THRESHOLD               80
CLUSTERED_LOBS                        NO
RUNDIRECTORY                          /var/opt/sdb/data/wrk/SPDT
OPMSG1                                /dev/console
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_KERNELDIAGFILE                       knldiag
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KERNELTRACESIZE                       5369
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_AK_DUMP_ALLOWED                      YES
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DIAG_HISTORY_NUM                      2
DIAG_HISTORY_PATH                     /var/opt/sdb/data/wrk/SPDT/DIAGHISTORY
_DIAG_SEM                             1
SHOW_MAX_STACK_USE                    NO
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LOG_SEGMENT_SIZE                      2133
_COMMENT
SUPPRESS_CORE                         YES
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FORMAT_DATAVOLUME                     YES
OFFICIAL_NODE
UKT_CPU_RELATIONSHIP                  NONE
HIRES_TIMER_TYPE                      CPU
LOAD_BALANCING_CHK                    30
LOAD_BALANCING_DIF                    10
LOAD_BALANCING_EQ                     5
HS_STORAGE_DLL                        libhsscopy
HS_SYNC_INTERVAL                      50
USE_OPEN_DIRECT                       YES
USE_OPEN_DIRECT_FOR_BACKUP            NO
SYMBOL_DEMANGLING                     NO
EXPAND_COM_TRACE                      NO
JOIN_TABLEBUFFER                      128
SET_VOLUME_LOCK                       YES
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SHAREDSQL_CLEANUPTHRESHOLD            25
SHAREDSQL_COMMANDCACHESIZE            262144
MEMORY_ALLOCATION_LIMIT               0
USE_SYSTEM_PAGE_CACHE                 YES
USE_COROUTINES                        YES
FORBID_LOAD_BALANCING                 YES
MIN_RETENTION_TIME                    60
MAX_RETENTION_TIME                    480
MAX_SINGLE_HASHTABLE_SIZE             512
MAX_HASHTABLE_MEMORY                  5120
ENABLE_CHECK_INSTANCE                 YES
RTE_TEST_REGIONS                      0
HASHED_RESULTSET                      YES
HASHED_RESULTSET_CACHESIZE            262144
CHECK_HASHED_RESULTSET                0
AUTO_RECREATE_BAD_INDEXES             NO
AUTHENTICATION_ALLOW
AUTHENTICATION_DENY
TRACE_AK                              NO
TRACE_DEFAULT                         NO
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TRACE_ORDER                           NO
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TRACE_DATATREE                        0
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TRACE_FRAMECTRL                       0
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TRACE_IPC                             0
TRACE_JOIN                            0
TRACE_KSQL                            0
TRACE_LOGACTION                       0
TRACE_LOGHISTORY                      0
TRACE_LOGPAGE                         0
TRACE_LOGTRANS                        0
TRACE_LOGVOLUME                       0
TRACE_MEMORY                          0
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TRACE_OBJECTCONTAINER                 0
TRACE_OMS_CONTAINERDIR                0
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TRACE_OMS_FLUSHCACHE                  0
TRACE_OMS_INTERFACE                   0
TRACE_OMS_KEY                         0
TRACE_OMS_KEYRANGE                    0
TRACE_OMS_LOCK                        0
TRACE_OMS_MEMORY                      0
TRACE_OMS_NEWOBJ                      0
TRACE_OMS_SESSION                     0
TRACE_OMS_STREAM                      0
TRACE_OMS_VAROBJECT                   0
TRACE_OMS_VERSION                     0
TRACE_PAGER                           0
TRACE_RUNTIME                         0
TRACE_SHAREDSQL                       0
TRACE_SQLMANAGER                      0
TRACE_SRVTASKS                        0
TRACE_SYNCHRONISATION                 0
TRACE_SYSVIEW                         0
TRACE_TABLE                           0
TRACE_VOLUME                          0
CHECK_BACKUP                          NO
CHECK_DATACACHE                       NO
CHECK_KB_REGIONS                      NO
CHECK_LOCK                            NO
CHECK_LOCK_SUPPLY                     NO
CHECK_REGIONS                         NO
CHECK_TASK_SPECIFIC_CATALOGCACHE      NO
CHECK_TRANSLIST                       NO
CHECK_TREE                            NO
CHECK_TREE_LOCKS                      NO
CHECK_COMMON                          0
CHECK_CONVERTER                       0
CHECK_DATAPAGELOG                     0
CHECK_DATAINDEX                       0
CHECK_FBM                             0
CHECK_IOMAN                           0
CHECK_LOGHISTORY                      0
CHECK_LOGPAGE                         0
CHECK_LOGTRANS                        0
CHECK_LOGVOLUME                       0
CHECK_SRVTASKS                        0
OPTIMIZE_AGGREGATION                  YES
OPTIMIZE_FETCH_REVERSE                YES
OPTIMIZE_STAR_JOIN                    YES
OPTIMIZE_JOIN_ONEPHASE                YES
OPTIMIZE_JOIN_OUTER                   YES
OPTIMIZE_MIN_MAX                      YES
OPTIMIZE_FIRST_ROWS                   YES
OPTIMIZE_OPERATOR_JOIN                YES
OPTIMIZE_JOIN_HASHTABLE               YES
OPTIMIZE_JOIN_HASH_MINIMAL_RATIO      1
OPTIMIZE_OPERATOR_JOIN_COSTFUNC      YES
OPTIMIZE_JOIN_PARALLEL_MINSIZE        1000000
OPTIMIZE_JOIN_PARALLEL_SERVERS        0
OPTIMIZE_JOIN_OPERATOR_SORT           YES
OPTIMIZE_QUAL_ON_INDEX                YES
DDLTRIGGER                            YES
SUBTREE_LOCKS                         NO
MONITOR_READ                          2147483647
MONITOR_TIME                          2147483647
MONITOR_SELECTIVITY                   0
MONITOR_ROWNO                         0
CALLSTACKLEVEL                        0
OMS_RUN_IN_UDE_SERVER                 NO
OPTIMIZE_QUERYREWRITE                 OPERATOR
TRACE_QUERYREWRITE                    0
CHECK_QUERYREWRITE                    0
PROTECT_DATACACHE_MEMORY              NO
LOCAL_REDO_LOG_BUFFER_SIZE            0
FILEDIR_SPINLOCKPOOL_SIZE             10
TRANS_HISTORY_SIZE                    0
TRANS_THRESHOLD_VALUE                 60
ENABLE_SYSTEM_TRIGGERS                YES
DBFILLINGABOVELIMIT                   70L80M85M90H95H96H97H98H99H
DBFILLINGBELOWLIMIT                   70L80L85L90L95L
LOGABOVELIMIT                         50L75L90M95M96H97H98H99H
AUTOSAVE                              1
BACKUPRESULT                          1
CHECKDATA                             1
EVENT                                 1
ADMIN                                 1
ONLINE                                1
UPDSTATWANTED                         1
OUTOFSESSIONS                         3
ERROR                                 3
SYSTEMERROR                           3
DATABASEFULL                          1
LOGFULL                               1
LOGSEGMENTFULL                        1
STANDBY                               1
USESELECTFETCH                        YES
USEVARIABLEINPUT                      NO
UPDATESTAT_PARALLEL_SERVERS           0
UPDATESTAT_SAMPLE_ALGO                1
SIMULATE_VECTORIO                     IF_OPEN_DIRECT_OR_RAW_DEVICE
COLUMNCOMPRESSION                     YES
TIME_MEASUREMENT                      NO
CHECK_TABLE_WIDTH                     NO
MAX_MESSAGE_LIST_LENGTH               100
SYMBOL_RESOLUTION                     YES
PREALLOCATE_IOWORKER                  NO
CACHE_IN_SHARED_MEMORY                NO
INDEX_LEAF_CACHING                    2
NO_SYNC_TO_DISK_WANTED                NO
SPINLOCK_LOOP_COUNT                   30000
SPINLOCK_BACKOFF_BASE                 1
SPINLOCK_BACKOFF_FACTOR               2
SPINLOCK_BACKOFF_MAXIMUM              64
ROW_LOCKS_PER_TRANSACTION             50
USEUNICODECOLUMNCOMPRESSION           NO
about send you the data from tables, i dont have permission to do that, since all data is in a production system, the customer dont give me the rights to send any information. sorry about that.
best regards
Clóvis

How to track the Modified Data-Please help

Hi Gurus,
Background about the issue.... We have Customers and Customer Tier on Siebel On Demand. Every month after bookings are done customer tier is modified depending on the reveune genrated by the customer. Say for example ....Customer XXX was under 'A' but due to bad bookings for the month now they are degraded 'B'. Like this we get a list of customer tiers for the month of all customers and are uploaded in to Siebel.
Now the challenge for me is while reporting in Analytics... how to retain the previous value. For example...For Customer xxx the customer tier was A in Aug and is modified as B in September. I want retain the previous value in my reports....
In one of the Siebel Query documents i saw that PRE <'Field Refrence'> syntax holds the previous value of the field ..But it did not work in my case...
Any suggestions to retain the old value after doing modifications..
Thanks for the help.
BK

BK,
My suggestion would be to write workflows that capture the data when it changes into the task description e.g.
PRE(CustomerTier) <> (CustomerTier) creates a task that puts (Customer Tier into the description)
then using the Task created date reflect that in the activity report.
cheers
Alex

Agilent E4980A Measurement Speed and Data Acquisition Speed

I am using E4980A LCR meter, I need very fast data aquisition unfortunately limited by device own speed with 5.6 ms per measurement which means nearly 178 Hz. I am using usb interface with the software provided by NI, in that program I made some modification taking the reading side of the programme in a while loop .
To test my speed I start the program count 5s and stop saving the results to an excell file. If I plot the results in a graph while programme is working I have 60 Hz speed. If I don't, then it is 80 Hz which are far below the potential maximum speed of 178 Hz. If my lap top battery is very low then my speed is worse. But with no battery problem, my celeron laptop performance is the same as an i7 laptop.
Here it is my programme, it is the same provided NI but some modification. What can I do to have higher data acquisiton speed ?
Probably, USB's speed is not enough but I can not believe that while it can save gigabytes of data in a few min can't take 200 datapoint in 1s. Why can't I have 178 Hz speed now and how can I reach this limit ?
Regards.
Attachments:
Read Measurement.PNG ‏44 KB
Read Measurement.PNG ‏44 KB

Instrument communications via serial, USB, Ethernet, GPIB, etc just tend to be slow. The instrument has to interpret the data, react to it, and then send data back. That takes time. A few ms per measurement is quite normal. One option you might have is you could tell the instrument to take several measurements and then request all of the measurements once it is done. I haven't looked into the E4980A yet to see if it can do that.
What exactly are you trying to measure. There might be better ways to get "fast" readings.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions

HT5957 How to improve speed in Iphone 4 using ios 7

I am using Iphone 4 and updated IOS 7, But speed is very in compare to last version. Please advice me to increase the speed.
Opening contact very low.
call to any number is very low.

Hi edumaravilla,
Welcome to the Support Communities!
The following information will explain how Airplay has changed in iOS 7:
iOS: Using AirPlay
http://support.apple.com/kb/HT4437
Here are some troubleshooting steps for Airplay:
iOS: Troubleshooting AirPlay and AirPlay Mirroring
http://support.apple.com/kb/TS4215
Cheers,
- Judy

Duplicate Data Fields Help Needed

We have a 9 page Word form that has some duplicate information, have converted it to LiveCycle but am stuck on finding out how to have the data from one field also show in another so the user does not have to enter twice. Eventually we will remove the duplicate fields, but for many reasons, right now they must remain. I don't want a Contractor to have to enter their Company name twice, etc., and have my main data collection form in the front of the 9 pages, and then when they get to the last page with sigs, etc., I would like what they've already entered for their Company information to show.
I am very new to Designer ES, and when I did some forms in Adobe 9.0 Forms awhile back, all I needed to do was to name the fields the same and if I entered info in one it would show in the other. ES does not seem to do that, and I can't seem to find out how to add any code to the field. Don't know why but alot of my options are grayed out.
Anyway, would very much appreciate help, thank you.

Giving them the same name is only one part of the solution ....you have to change the binding (on the Object palette/binding tab) to Global.
Paul

How to improve speed of data acquisition? Help needed urgently.

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