RF acquisition stream PXIe 5663 et disk RAID

Bonsoir
j'essaie de réaliser un enregistreur large bande !!! Je dispose d'une carte PXIe 5663 et de disques RAID à 200Mo/s (je ne me rappelle plus de la réference mais il y a 4 disques de 250Go sur un U)
J'utilise les drivers RFSA configurés en IQ pour réaliser une acquisition continue et j'écris directement les données sur le disque au format I16.
Mais je n'arrive pas à enregistrer en continue j'ai le message d'erreur qui me dit que les données ont été écrasées dans le numériseur !!!
Pourquoi est ce que ça ne tient pas le débit??? que je mette 50MHz ou 20MHz de sampling rate j'ai le même message!!!
A 50MSPS en IQ je suis pourtant théoriquement à 200Mo par seconde, non?????Je ne comprend pas !!!
Help

Bonjour Romain,
Bon dans ce cas là ce qui relentie l'écriture ce serait l'accés au disques.
Déjà vérifie que les disques sont bien configurés en RAID 0 (striped) pour avoir les 200Mo/s en lecture/écriture (conf. INSTALLATION GUIDE NI 8260).
Aussi je te renvoie vers ce doument Stream to Disk Using Win32 File IO qui explique avec des examples comment faire des accés fichiers non bufferisés (donc plus rapides) sous windows en LabVIEW.
Pour répondre à ta dernière question: Le "fetch" va chercher les données dans le mémoire de la carte et les met en RAM (du PC). Donc tout ce qui se passe aprés se passe en RAM.
Cordialement,
Ludovic R.

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Hi lehrm,
you are writing about that you didn#t see any application for the 5122. If you mean examples, there are a lot of examples installed on your system when you install the driver sw for the device. eg. there is an example called niScope EX Stream to Disk, that seems to be interesting for your issue
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HI all,
I have this sytem configuration:
PXIe-8135 controller. Windows 7 64-bit, RFSA 2.7.5. NI-SYNC 3.4.1
PXIe-1075 chassis
PXIe-5663 (2x)
PXIe-6672 Timing & Sync Card (slot #10)
I want to trigger the recording of my Digitizer with an external trigger.
The External Trigger is connected to PFI0 of the PXIe-6672 Timing card.
Then, the PXIE-6672 card routes the trigger to the backplane of the PXIe-1072 (Destination "NISYNC_VAL_PXITRIG0")
The PXIe-5663 are triggered with “NIRFSA_VAL_PXI_TRIG0_STR” as the source.
The trigger fires my PXIe-5663 correctly, but the timing is not tight (> 5ns).
I would like to use the PXI Star trigger instead, I think that I should be able to acheive much better synchronization with this.
But NI-RFSA won't let me do this:
When I try to call
"niRFSA_ConfigureDigitalEdgeStartTrigger(rfsa_session, NIRFSA_VAL_PXI_STAR_STR , NIRFSA_VAL_RISING_EDGE)", I get the error:
"Specified Route Cannot Be Satisfied, Because the Hardware Does Not Support It"
I don't understand why the PXIe-5663E would not be able to use that Route.
Any idea?
Regards,
Serge
Serge Malo, ing.
Concepteur logiciel
Software Developer
T (514) 842-7577 x648 | [email protected]

That explanation isn't quite right. Usually, even PXIe modules have a connection to PXI_Star. The PXIe standard added the PXIe_DStar trigger buses, and it also preserved the PXI_Star bus from the PXI standard.
However, there is an additional twist in this situation. I'm assuming that your PXIe-5663 includes a PXIe-5622 as the digitizer. It turns out that a synchronization technique called NI-TClk has eliminated the need for our more recent digitizers to rely on triggering from PXI_Star. I was able to find some documentation that includes this information, here and here. Given that, I think you have two options that should result in better synchronization.
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NI R&D

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Sergey

Sergey,
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Hi all,
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mv /u01/oraindx/DB01/indx01_07.dbf /u01/oraindx2/DB01/indx01_07.dbf
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regards,

Werner,
If this is an active databases (indexes are used),
you cannot set offline the index tablespace.you can offline it.
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Tablespace created.
Scott user:
SQL>create table t2 (col1 date, id number) tablespace users;
Table created.
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2 from dba_segments
3 where owner='SCOTT' and segment_name like 'T2%';
SEGMENT_NAME                   SEGMENT_TYPE       TABLESPACE_NAME
T2                             TABLE              USERS
T2_IND                         INDEX              INDS
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SQL>alter tablespace inds rename datafile '/oracle/newdb/mydb/inds01.dbf' to
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SQL>
SQL>select * from t2;
COL1              ID
22-NOV-07          1
22-NOV-07          2
22-NOV-07         10
22-NOV-07         20
SQL>commit;
Commit complete.

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[email protected]

Hi frendz,
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PXI invalid sytem disk

最近PXIシステムを購入したのですが、PXI-8186にWIndows OSをインストールしようとすると、"Invalid system disk"というエラーが出てきてうまくいきません。CD-ROMドライブはNIが推奨しているTEAC社製のものを使用しているので、CD-ROMの相性の悪さが原因とは思えません。どうしたらOSをインストールできるようになるでしょうか。

お世話になっております。
日本ナショナルインスツルメンツ、湯田と申します。
Leorge様
ご返答ありがとうございました。
MNaka様
OSをインストールする際に表示される"PXI Invalid System Disk"の問題についてですが、
ハードドライブよりもCD-ROMが先にブートすることで、
正常にドライブを認識し、CD-ROMからインストールすることができるかと思いますので、
以下の方法で今一度ご確認のほどよろしくお願いします。
１．起動画面にて、"Delete"キーを押し、BIOS画面に入る
２．"Boot"タブに移動し、USB CD-ROMが認識されているか確認する
３．USBデバイスをハイライトし、＋キーでUSBデバイスを一番上に移動する
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上記の設定を行いますと、CD-ROMが一番最初のブートデバイスとして認識されるため
インストールできるかと思います。
以上ご確認よろしくお願いいたします。

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iam sending PN sequence or user defined pattern 01010101
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here i attach the code
Attachments:
MT RFSG Generate PSK.vi ‏53 KB
MT niRFSA PSK Demod.vi ‏89 KB
PN_Sequence_09.txt ‏2 KB

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This account is no longer active. Contact ShadesOfGray for current posts and information.
Attachments:
StreamToDiskFromSerial.vi ‏65 KB

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Hi all,
I need to do high-frequency, high-channel-count acquisition.
Specs
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Chasses: PXIe-1085 (2x)
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Description
Each FlexRIO card will store data in circular buffers, and continuously monitor the voltage levels. When any one channel exceeds the user-defined threshold, all 60 channels need to be triggered simultaneously to pass waveform data (200 μs pre-trigger, 300 μs post-trigger) to the host OS for logging.
In other words, every FlexRIO card needs the ability to fire the trigger, which is then received by all 15 FlexRIO cards (the card that fires the trigger also needs to receive the trigger).
Question
Can I achieve this with only a single PFI line? Or do I need some other technique?
I've found some examples, but they only show single-source and single-card triggering, e.g. https://decibel.ni.com/content/docs/DOC-30182 uses one analogue input to trigger the acquisition of 2 channels on the same card.
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National Instruments
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Message was edited by: Just-Karma

Hi all,
Ok so I decided to not go done the raid mirriring route. Instead I finally made a decision and boughts a Macpower FW800 enclousre which uses the Oxford 934 chipset and a Samsung HD103UJ 1TB Serial ATA 3.0 Gbps
buffer memory32 MB hard disk.
The enclosure is excellent quality and the disk access is very quick via FW800. The disk itself is very quiet and also great for Final Cut with my HD editing. Only noise the disk makes is upon power up other than that it is very quiet.
I have partitioned th disk into two 500GB's. One partition is used for time machine backups and the other is the Final Cut scratch space.
I plan to buy another enclosure and 1TB disk and parition into two 500GB's also. I plan to use one of the 500GB's for Super Duper clone of iMac system hard disk and the second for cloning/backing up the scratch Final Cut space. This second disk and enclosure will be my offline backup system and will not be powered all the time.
Details of the elcousre and hard disk are provided below. I purchased them in the UK. Enclosure was purchased from www.span.com and hard disk from www.ebuyer.com. Whilst span can sell disks in the enclosure you can save yourself a little money and buy seperatly from ebuyer and install yourself.
Enclosure:
http://www.macpower.com.tw/products/hdd3/pleiades/pd_scombo
Hard disk:
http://www.samsung.com/global/business/hdd/productmodel.do?group=72&type=61&subt ype=63&model_cd=249&tab=fea

RF acquisition stream PXIe 5663 et disk RAID

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