How to match impedance between AT-MIO-16 and 50 Ohm output of preamp

I am trying to count TTL signal from a preamplifier/discriminator (ARI Corp's MTS-100) using the AM9513 chip built into the NI AT-MIO-16 A/D board.
With only power to the preamp (i.e. no input signal) I get ~150,000 or so counts per second, while with a different rate meter I get normal 5-10 counts per second. These excess counts would seem to be caused by an impedance mismatch leading to ringing in the line from the preamp to the A/D board.
The TTL output from the preamp has an impedance of 50 Ohms, minimum pulse width of 10 ns. I use a coax cable with impedance of 50 Ohms that is terminated with a 50 Ohm cap just before going to the connector block for the A/D board. Bottom line, I match the imp
edance as well as I can and still get reflection. The detector,preamp,A/D board,computer,etc are all tied to the same ground. The discriminator level has little or no effect.
Could I be connecting to the connector block of the A/D board incorrectly? Is there a threshold adjustment available for the Source (i.e. Vhigh) that might be set too low?
Is this hopeless? Or are there other things to try?
Any help would be appreciated.
Thanks,
sonnymoon

Ben on 7/25/2002 answered:
"Hi its me again.
Can you see the ringing with a scope?
What exactly are you using to get the counts from the board?
Are you sure you are re-setting the counter and have the clock configed to come from your external signal?
Ben
Hi Ben,
Thanks for your help on this. I have tried using both Labview software and NI Measurement and Automation test panels. I remember trying to figure out how to address the counter correctly using Labview "Counter Start", "Counter Read", "Counter Stop" VI's. Perhaps you could confirm for me, I am putting the signal from the preamp into "Source 1" on the A/D connector board, and I use "GPCTR1" to identify the counter.
Does the "Counter Stop" VI reset the counter? I was as
suming it does. If not, how do I do that?
But, using the NI Measurement and Automation test panels, selecting "Simple event counting" and "GPCTR1" I see lots (100,000's) of counts pile up in 1 second when I should only see 5-10.
I haven't checked with a scope (we don't have one in our lab!) but I may try to borrow one to confirm it is ringing.
My basic set up is as follows:
BNC (50 Ohm) from preamp TTL out to BNC T adapter with a 50 Ohm Terminator cap.
Signal lead from BNC plug to PIN 41 (Source1) of AT-MIO-16 I/O connector. Ground lead to PIN 24 (DIG GND) which is also grounded to be the same as that of the preamp and dectector.
Thanks again for your help,
Joel

Similar Messages

  • HT204388 how do I switch between my mac mini and iMac using iMac screen?

    how do I switch between my mac mini and i mac using i mac screen?  I thought it was using F2 but that does not seem to work.

    To switch between your Mac mini and iMac, you just have to turn on or off Target Display mode. To do it, press Command and F2 keys in your iMac, not only F2

  • How is the interface between the Java Stack and ABAP stack is achieved?

    How is the interface between the Java Stack and ABAP stack is achieved?..Please send me the answer to [email protected]

    Hi,
    By interface, I assume you mean the connection between the ABAP and the Java stacks in a double stack system.
    The connection from Java to ABAP is through JCo connections defined in the WebDynpro section of the J2EE start page. So Java to ABAP requests are processed through JCo.
    The connection from ABAP to Java is through RFC connections defined in TA SM59. The ABAP to Java requests are processed through RFC.
    Refer https://dsd.esco-salt.com/StartPage/documents/integration/3.html for detailed explanation.
    The UME can be maintained in either ABAP or in JAVA depending on the persistence.
    Refer: http://help.sap.com/saphelp_nw70/helpdata/en/5b/5d2706ebc04e4d98036f2e1dcfd47d/frameset.htm
    Check UME data source configuration.
    Some quick FAQs can be found at:
    https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/ad47eb90-0201-0010-7cb2-ddfa5ed879ec
    Hope this helps.
    Best Regards,
    Srividya.R

  • How to Reconcile Data Between SAP Source Systems and SAP NetWeaver BI

    Hi,
    I just read "How to Reconcile Data Between SAP Source Systems and SAP NetWeaver BI".  While I'm waiting for  more authorisation to r/3 to carry it out and test this functionality.
    I'd like to ask a question to anyone who has implemented this type solution.  On page 10 it talks about creating a view then setting up the datasource. The solution talks about runnig a query.  I suspect when we run a query I would run it for only a period(using variable) to reconcile.
    My question is this.  Will the datasource extractor on /r3 only select the period in our variable or will it do a full selection of the data which would then be passed to BW for filtering?
    Regards

    DEar Mark,
    There are several avenues where you can see and reconcile your data with source system, u can see data in by tcode RSA3 for a datasource, and compare the values with actual document posted into the R/3 system. Respective fuctional consultant canhelp you a lot to confirm the data.
    On BW side u can see the data in PSA and then check tranformations which subsequent change/update/reject data records based on the selective conditions.
    hope this helps.
    Kindly assign the points if it works.
    Revert back if u need futher help/information.

  • How is the difference between CRS-MSC-B and CRS-MSC-40G-B

    How is the difference between  CSC-MSC-B and CSC-MSC-40G-B and it can be used interchangeably or not ?
    thanks for your kindness

    Hello Marut,
    That is the same HW, no difference.
    Regards,
    /A
    Please visit http://cisco.com/go/testdrive or contact your account rep to schedule nV tech demo.

  • How can I distinguish between a regular iPod and a iPod 4 s?

    How can I distinguish between a regular iPod and a iPod 4 s?

    Hi ARPantoja!
    I have an article here that can help you distinguish different iPod models:
    Identifying iPod models
    http://support.apple.com/kb/HT1353
    Take care, and thanks for visiting the Apple Support Communities.
    -Braden

  • How to share files between Mac booK pro and iMac?

    Hi
    I dont know how to transfr files between the two. HELP?

    It is done with File Sharing. System Preferences, Sharing.

  • I am confused about how to manage photos between my iPhone, iMac and iPad.  How do I avoid using all the storage pace on my various devices?

    How do I manage photos between my ipad, iphone and imac without using all the storage on the various devices?

    If enabled, iCloud Photo Stream ensures all new photos are sent to all your devices. Then you can simply add the ones you want to each one's Library, and delete any photos you don't want.
    One technique is to designate one device as the "master" containing all your photos - probably your iMac, since it is likely to have the greatest available storage - and make sure you have a backup strategy for it. That way, any photos you choose to keep on your iPad and iPhone are redundant copies that can be deleted as you wish, or as required should you need to restore your iOS device. If your iMac breaks and its Library irretrievably lost, the importance of its backup becomes critical. Therefore, consider having more than one backup, and more than one geographical location for them.

  • How to switch quickly between the native soundcard and USB speakers?

    My computer has two sound devices: one, the native sound card (which I use for my headphones), and an external pair of USB speakers. However, switching between them is a complicated task, mainly because I find almost no programs to do it:
    * GNOME Control Center, Sound section: What currently works for me, but can only be used within GNOME Shell or Cinnamon. It can be used from other sessions, though (for example Spectrwm), but it's very heavyweight to have the whole GNOME desktop solely to switch between sound cards.
    * KMix: Works only within KDE and nowhere else. What's more, to actually do the switch one must open the program, go to the options menu and select the soundcard (unlike GNOME, which is two clicks away from the status bar).
    * Pavucontrol: Kind of works, but only in a per-application basis. That is, I can't tell the system to start all current and future sound streams in X device. What's worse, I must wait until the application is open to actually do the switch.
    * XFCE4 Mixer: Doesn't work from outside XFCE. Even there, switching cards is not possible without literally editing a configuration file each time.
    * Alsamixer and GNOME Alsamixer: Can't switch sound cards at all.
    So, I'm still on the search of a lightweight program that can allow me to do something as simple as switching between my USB speakers and native headphones without much hassle. Is there anything else besides GNOME that can do the trick?

    The script I use with pulse.
    #/bin/bash
    # paswitch 2011-02-02 by Ng Oon-Ee <[email protected]>
    # I can't remember where I found this script, can't locate the original author.
    # Please inform me if you know, so that I can give proper attribution.
    # CHANGES: Added auto-move all inputs to new default sound card.
    # WAS: Pulse Audio Sound Card Switcher v1.0 2010-01-13
    # Switches between soundcards when run. All streams are moved to the new default sound-card.
    # $totalsc: Number of sound cards available
    totalsc=$(pacmd "list-sinks" | grep index: | wc -l) # total of sound cards: $totalsc
    if [ $totalsc -le 1 ]; then # Check whether there are actually multiple cards available
    notify-send -u critical -t 5000 "Nothing to switch, system only has one sound card."
    exit
    fi
    # $scindex: The Pulseaudio index of the current default sound card
    scindex=$(pacmd list-sinks | awk '$1 == "*" && $2 == "index:" {print $3}')
    # $cards: A list of card Pulseaudio indexes
    cards=$(pacmd list-sinks | sed 's|*||' | awk '$1 == "index:" {print $2}')
    PICKNEXTCARD=1 # Is true when the previous card is default
    count=0 # count of number of iterations
    for CARD in $cards; do
    if [ $PICKNEXTCARD == 1 ]; then
    # $nextsc: The pulseaudio index of the next sound card (to be switched to)
    nextsc=$CARD
    PICKNEXTCARD=0
    # $nextind: The numerical index (1 to totalsc) of the next card
    nextind=$count
    fi
    if [ $CARD == $scindex ]; then # Choose the next card as default
    PICKNEXTCARD=1
    fi
    count=$((count+1))
    done
    pacmd "set-default-sink $nextsc" # switch default sound card to next
    # $inputs: A list of currently playing inputs
    inputs=$(pacmd list-sink-inputs | awk '$1 == "index:" {print $2}')
    for INPUT in $inputs; do # Move all current inputs to the new default sound card
    pacmd move-sink-input $INPUT $nextsc
    done
    # $nextscdec: The device.description of the new default sound card
    # NOTE: This is the most likely thing to break in future, the awk lines may need playing around with
    nextscdesc=$(pacmd list-sinks | awk '$1 == "device.description" {print substr($0,5+length($1 $2))}' \
    | sed 's|"||g' | awk -F"," 'NR==v1{print$0}' v1=$((nextind+1)))
    #notify-send "Default sound-card changed to $nextscdesc"
    dbus-send --session --type=method_call --reply-timeout=10000 \
    --dest=org.freedesktop.Notifications /org/freedesktop/Notifications \
    org.freedesktop.Notifications.Notify string:"paswitch" uint32:1 \
    string:$icon_name string:"Default sound card is now" string:"$nextscdesc" \
    array:string:"" dict:string:string:"","" int32:3000
    exit
    # Below text was from original author and remains unaltered
    # CC BY - creative commons
    # Thanks God for help :) and guys lhunath, geirha, Tramp and others from irc #bash on freenode.net

  • How to push a button, run a report, and open output in new windows?

    I have an application where I want to present the user with a form, have them enter their report parameters, and then press a go button. I would then like to display a progress bar. The report will generate both a PDF and HTML output. When the report is complete, I want to display each one of these outputs in their own browser window.
    How do I do this?

    You want to retrieve two responses? Then you'll have to invoke two requests simultaneously. You can make this possible with a Javascript window.open call in the onclick attribute of the commandButton. E.g.
    <h:commandButton
        value="submit"
        action="#{myBean.submit}"
        onclick="window.open('pdfServlet?param1=value1&param2=value2');" />Where the bean action just returns the HTML (JSF) result and the onclick fires a servlet, if neccessary supplied with request parameters so that it knows what PDF it need to generate.

  • How to convert String "(50-10)" to number and get output as 40 as a number.

    Hi,
    I have a string with formula, eg: String formula="(ABC-DEF)";
    I replaced the values of ABC and DEF in the above string now I have formula="(50-10)";
    How can I calculate the above value and get output (40)as a number like int or double.
    Regards
    Alex.
    Edited by: AlexRaju on Dec 8, 2009 10:11 AM

    Values for ABC and DEF are coming from different java collections like HashMap or ArrayList etc. The formulas can be complex which need some string manipulations and atlast I will get a string like "(50-10)" or "(20+(Math.SQRT(25)/Math.Power(2,3)))". Here all the numbers are values for variables like ABC or DEF coming from different hashmaps and arraylists based on different conditions.
    Thanks
    Alex.
    Edited by: AlexRaju on Dec 8, 2009 10:36 AM

  • How to match colors between 2 photos?

    Hi everyone!
    I'm faced with a problem here. I made myself a Grey/Color card, having it developped at the local photo store. I know it's not the best solution, but I couldn't get my hand on a 100$ ColorChecker, I'm broke! (20¢ a picture is quite a good deal!)
    Here is the default file I used for my photos:
    And once I take my picture (Ok, this one is from my laptop screen, but it's only for example purpose) it loks like this
    Is there an easy / quick way to have the color match? Is it possible to make an easy color profile, since the colors are pure (W,18% Gray,Bk,C,M,Y) in my default picture? Even if I try to have the white balance on, or try to modify the hue and saturation, the results in the CMY aren't matching. Since we have a color we know the value, it should be easier to fix it, no?
    If you could point me in any (free) direction to solve my problem, that would be grand!
    Thanks!

    DaSniper1977 wrote:
    ... I'm taking pictures for my GF, who makes jewels. All those beads, pearls and cristals have little tint in them, and being so small, it makes it almost impossible to adjust the color for them to look as good as what I see when taking the picture.
    I was thinking (I'm going on a limp, here!) that IF I had a reference picture (see above), in a computer generated format, and the same pattern that I took a picture of, that I could tell LR that, let's say Magenta, is supposed to look like the one I have on my PC. and it would adjust the colors accordingly. Building a ColorProfile on the cheap would maybe best describe what I want to achieve, but only for a batch of pictures, not for the camera. (Once we sell the jewels, I promise to get a real ColorChecker and stop bugging you guys!)
    Sorry to be discouraging, but I think your concept is fuzzy and ill conceived.
    Basically, your task requires excellent color management. Product photography (where color matters a lot), just can't be done very well at the $0.20/print level.  You need skills and equipment for lighting and image capture. Editing should be done using a calibrated monitor, and printing done with  a profiled printer.  The image you showed reflects a serious lack of of color management.
    If you succeed at what I think you are describing, your images would lose the photographic quality of continuous and subtle color gradation.  They would more closely resemble posters or cartoons than photographs.  Even though  a jewel stone may technically be a single uniform color, a good photo reveals the effects of it's surroundings, lighting, and surface effects (reflections, polarization), and shows the stone as multiple colors.  Often those colors are similar, but they are never all the same.
    In any case if you still want to go down the path of "block" colors, LR is the wrong tool. Try Photoshop,  which makes it relatively easy to select a range of similar colors and convert them to a single color.        
    Jerry

  • How to share file between windows server host and hyper-v windows server ??

    Hi there
    I installed windows server 2012 r2 as my host windows and again installed windows swrver 2012 r2 on hyper-v in one system .
    now when I go to file explorer > netwrok there is no computer name to share file or folder between them 
    How can join both windows to netwrok place in file explorer to share file and folder 
    before I try windows 8 as my host and server 2012 r2 as hyper and when I went to file explorer > network there were to pc's there . first windows 8 and second win server 2012 
    but when both windows are server there isn't and network pc's in network location on file explorer 
    please help me how can I bring them both server to file explorer > netwrok 
    Thanks
    Regards :
    Raha
    whit the best regard : Raha

    Hi 
    thanks to you both
    but when we install windows server as host there is not our windows in the 
    Internet\Network and sharing center\ ....... and in the file explorer > network 
    I found it when I add server host in server manager in guest server and manage it as host server user and then share files and folders from computer management and then create a shortcut from the share folder to desktop 
    and the did same for guest ... add guest server in server manager in the host server and manage it as guest server user and then share it's files and folders from the computer management and create a shortcut of share folder to desktop 
    if host windows be a client windows so this is so easy because after we install hyper-v win-server and go to file explorer > network > so we able to see both windows and all files and folders there but if host windows be a win-server we can't see them
    in file explorer > network 
    thanks you both again 
    Best Regards :
    Raha
    whit the best regard : Raha

  • How to inherit roles between root organization unit and sub units

    Hi all,
    I have root organization unit and sub units:
    ->Company
    >Department 1
    >Department 2
    >Department 3
    >Department 4
    >Department 5
    I would like it to work like this that all people from all departments would have access to transaction ZTEST. Most obvious way would be for me to assign appropriate role to unit Company. Unfortunately it looks like roles are not inherit between units like this. So question is how it should be done? Do I have to assign this role to all departments to make it work?
    Best regards
    Marcin Cholewczuk

    Hi,
    To activate inheritance of roles between root org and sub org units, you need to set switch HR_ORG_ACTIVE to Yes in table PRGN_CUST. Also proper evaluation path has to be used so that user comparison (via PFUD)  creates the indirect role assignment to user master records.
    You can modify evaluation path US_ACTGR in table T77AW/ tcode OOAW to include root org and its subunits (add entry for relationship O B002 O) and connect the role assigned to root org to the users belonging to sub org units. Then run PFUD which will use this evaluation path to create indirect role assigment.
    Thanks
    Sandipan

  • How to make interconnection between a legacy system and SAP system?

    Hi Group,
    I have a query on the interconnectivity between a legacy system( non-SAP ) and an SAP system.
    The legacy provides data in the form of Files only.
    my queries are as under:
    1)
    how can I make a connection to the Legacy from my SAP system?
    2)
    what are the different ways by which I can connect these 2 different systems?
    3)
    I hope there might be a chance of connecting the systems by way of using webservices, in this case what are the things I need to follow inorder to make the connection and get the data from legacy?
    please provide me with necessary info on these queries to proceed further.
    thanks in advance.
    Regards,
    Vishnu.

    Hi,
    U can use the GUI function m modules to fetch the data from legacy systems.
    Also With the help of Remote FMs u can get connected to the SAP backgrounds from NON SAP background like Portal.XI is an interfacing tool used to connect 2 SAP or SAP to non SAP medium.
    Regards,
    Ajit.

Maybe you are looking for