Sample with an external clock with a SCXI 1140 (8 channel sample/hold amplifier)

I have a SCXI 1140 (8 channel sample/hold amplifier) and a SCXI 1305 card (BNC).
I want to sample an analog signal with external frequency (SMB connector).
I plug an analog signal on the channel 0 and a TTL signal on SMB connector "hold/clock" (the jumper corresponding to the SMB connector is on Hold postion).
I use the "ACQUIRE N SCANS - EXT SCANSCLK.VI" LabView example with :
DEVICE=1
CHANNELS [0]=SC1!MD1!0
CLOCK SOURCE=I/O CONNECTOR
CLOCK SOURCE STRING=SC1!MD1!
When I execute the example, I have the error -10 001 (problem with clock source string).
If I used CLOCK SOURCE=INTERNAL there is no error, but I do not sample with hold signal !
What is the probl
em with the string ?
Is there another solution for sampling whith an external signal ?

The error that you're seeing is being generated because the clock source string should be "sc1!md1" not "sc1!md1!". It's the "!" at the end of the string that is causing the error.
Regards,
Erin

Similar Messages

Cascade scxi 1142 with scxi 1140

I would like to cascade an SCXI 1142 with an SCXI 1140. I've come across a knoeledge base article indicating I can only do this with an SCXI 1140 Rev F or later.
I have two SCXI 1140's but with a REV: 1_ on a label on the exterior of the module. I looked for a revision number on the circuit board as per the user manual but there is none.
These SCXI 1140 modules would have been purchased quite a number of years ago.
I would like to know if I can cascade SCXI 1142's with my version of SCXI 1140's?
If the answer is no, what are my options for filtering?
Thanks,
Brian

Hi Brian,
I'm assuming this is the KB you are talking about.
Interesting that you can't find the revision or part information on the 1140 board itself. Another way to check to see if the module can be cascaded is to see if there is a 16 pin connector on the board inside the module. The SCXI-1352 Installation Guide and Tutorial: Cascading SCXI Modules have more information in terms of where the internal 16 pin connector is located and what it might look like. If the connector is on the board then you will be able to cascade the module with the 1142 using the SCXI-1352 cable kit.
If you do not have the later revision of the 1140 with this internal connector I'm not sure what other options you have. Really, probably the easiest thing to do is to get the newer revision of the 1140 that allows cascading. Do you need the signals to be simultaneously sampled using the T/H module? If not, you can just use the 1142 module for filtering, but you will have channel to channel skew.
Hopefully this helps,
Chris G
Applications Engineer
National Instruments

Driving DO lines with external clock wired to PFI lines

Hi all,
I have few issues understanding how to use hardware timing resources in M series USB6229, with particular focus on DO. I have read last couple of day all google offered on the subject but I am still straggling with some basic tasks. To cut the story short, the 1e6 dollar question: can I set up 7 independent DO lines where (different tasks or virtual channels) where lines use same hardware timing source (eg, freqout or CO0 set to ~10kHz sampling time routed to PFI0).
Note: the reason I need 7 independent lines and not a port output (which would be obvious solution) is because I need to have (vastly) different number of samples and for each line.
Follow up question regarding timing: As I understood, any of PFI ports could be used and a input to the external clock which could be used to drive DO line(s) samples. I have tried to generate one DO, eg. P0\line4 by using CO0 to generate 10kHz sample rate. The signal on the line4 is pulse with frequency of few Hz which I routed to PF6 (with actual wire) in hope to use this signal as a clock for line5. I tried this but I am receiving errors about "resources in use"
Possible reason(s):
Specified route cannot be satisfied, because it requires resources that are currently in use by another route.
Property: SampClk.Src
Property: SampClk.ActiveEdge
Source Device: USB-6229
Source Terminal: PFI6
Required Resources in Use by
Task Name: _unnamedTask<7B>
Source Device: USB-6229
Source Terminal: PFI4
Destination Device: USB-6229
Destination Terminal: do/SampleClock
Task Name: _unnamedTask<79>
Apparently, many of internal clocks are routed internally to different PFI lines which mean the lines are occupied resource, and I do not know how to solve this.
I wanted to ask you does this principle sound as something that should work and if you know about some examples that would be excellent.
Any help would be greatly appreciated.
Cheers, Nenad

> To cut the story short, the 1e6 dollar question: can I set up 7 independent DO lines where (different tasks or virtual channels) where lines use same hardware timing source (eg, freqout or CO0 set to ~10kHz sampling time routed to PFI0).
No, you can't. The USB-6229 has a single digital output FIFO which can only be used by one task at a time.
> Note: the reason I need 7 independent lines and not a port output (which would be obvious solution) is because I need to have (vastly) different number of samples and for each line.
It should be possible to generate all seven signals with a single task by generating a waveform that includes all seven signals. If the signals repeat at different rates or you need to start/stop them independently, you will have to disable regeneration and continuously generate new waveform segments on the fly. Continuous Write Digital Port - External Clock - Non Regeneration should be a good starting point for the DAQmx programming, but actually generating the data is likely to be the challenging part.
Brad
Brad Keryan
NI R&D

Reading digital port with external clock at maximum speed

I have a PCI-6509. I am programming a fast loop to read 32 bits values from the digital input using an external clock ( injected into one of the card pin inputs )
The environment is Windows2000 + Visual C++ .
basically I am doing
DAQmxErrChk (DAQmxCreateTask("",&taskHandle));
DAQmxErrChk (DAQmxCreateDIChan(taskHandle,"Dev1/port0:3","",DAQmx_Val_ChanForAllLines));
DAQmxErrChk (DAQmxSetSampTimingType(taskHandle,DAQmx_Val_ChangeDetection));
DAQmxErrChk (DAQmxCfgChangeDetectionTiming (taskHandle,"/Dev1/port5/line4:4", NULL, DAQmx_Val_FiniteSamps , sampsRequested));
DAQmxErrChk (DAQmxStartTask(taskHandle));
getSystemTime...
DAQmxErrChk (DAQmxReadDigitalU32(taskHandle,-1,-1,DAQmx_Val_GroupByChannel,data,sampsRequested,&sampsRead,NULL));
getSystemTime...
I pass a data buffer big enought to hold the number of samples I am requesting ( for example 10000 of uInt32 ).
It works fine. I get my values but the speed I get is only around 10 KHz.
I print the system time before and after the call to DAQmxReadDigitalU32 as you can see from the above code.
This makes no sense because my external clock in ,"/Dev1/port5/line4:4" (as selected on the ChangeDetectionTiming call) runs at 2.0 MHz.
Could someone tell me what parameters I have to pass to this sequence of NI DAQ functions calls in order to really read at the speed of my external clock?
many thanks in advance,
Roberto AButer.
Note :
I am going desperate with the web pages, documentation , online helps and the pletora of products and so on.
I did pay to NI a considerable amount of money for the card , the labview software etc and I just want to do the simplest 20 lines C program to read my digital signal at the speed is being injected. Should that be that difficult????

Hello caca,
the board you are using is specified as a static IO board. That means it was not constructed to do highspeed DIO operations.
You cannot use a hardware clock to time your input and output
operations, so you have to use a software timing or, as you chose, the
change detection interrupt. But the maximum speed you can archieve
doing this, is somewhat limited of course.
Check this thread for some more information.
Ingo Schumacher
Systems Engineer Sound&VibrationNational Instruments Germany

Single Pulse Width with External Clock

I am trying to setup a 6602 counter for a single (non-buffered) pulse width measurement with an external clock. Under normal testing, the unit under test will provide the pulses, I need to measure the number of pulses during different time periods (1, 60, and 300 seconds). I want to do a pulse width measurement and I'll supply the gate signal pulse to the counter for the specific time needed.
Under normal operation, the unit under test is wired into the counter's source and the pulse is wired into the gate. For testing purposes I am using a BNC-2121. I have the counter's source wired to the Adjustable Square Wave Output and the gate wired to the Trigger output.
Here is my C++ code. I am getting a timeout error on the read and I don't know why. Any help would be appreciated.
   //Create Task
   DAQmxCreateTask( "task1", taskHandle );
   //Create Pulse Width Channel
   DAQmxCreateCIPulseWidthChan( taskHandle,             // TaskHandle
                                                   szCtrName.c_str(),     // Counter Name
                                                   "",                             // Channel Name
                                                  dMin,                          // Min Value
                                                  dMax,                         // Max Value
                                                  DAQmx_Val_Ticks,     // Units
                                                  DAQmx_Val_Rising,    // Gate Edge
                                                  "" );                            // Scale Name
   //Set the Pulse Width Terminal to the gate signal
   DAQmxSetCIPulseWidthTerm( taskHandle,     // TaskHandle
                                                 "",                       // Channel
                                                 "/CTR2/PFI38" ); // Terminal
   //Set the Timebase Src to the counter's source
   DAQmxSetCICtrTimebaseSrc( taskHandle,         // TaskHandle
                                                "",                       // Channel
                                                "/CTR2/PFI39" );   // Terminal
   //Start Task
   DAQmxStartTask( taskHandle );
//***Send pulse to gate counter***
   //Read Counter
   DAQmxReadCounterU32( taskHandle,                      // Task Handle
                                          DAQmx_Val_Auto,           // Num Samps to Read
                                          10,                          // Timeout
                                          ulBuffer,                           // Read Buffer
                                          1000,                               // Buffer Size
                                          &lSampsRead,                 // Num Samps Read
                                          NULL );                            // Reserved

I've setup a pulse width task in NI-MAX using the onboard clock and everything worked fine, so I know the hardware is working.
My unit under test is providing the pulses (from gyros) I need to measure. The pulses indicate the position of the unit so there are X, Y and Z axis gyros. I need to measure these pulses for specific periods of time (1, 60, and 300 seconds). For example during the 1 second measurement, the X and Y gyros should measure zero pulses and the Z axis should measure 515 gyros. During a 300 second measurement the X and Y gyros should measure < 60 and the Z axis should measure 30800.
So the gyro pulses are wired to the counter input and I am using a DIO channel from NI-6508 to provide the gate pulse. The gate signal will be high for either 1, 60, or 300 seconds depending on the test. The gyro pulses are essentially the external clock to the counter. I want to count the gyro pulses during the pulse of the gate (DIO).
To simplify the setup, I connected to BNC-2121 directly to the card. I have the adjustable clock output going to the counter input of ctr0 and the trigger signal going to the gate of ctr0. Once the task has been started and before the read ( I had a breakpoint set in the code), I would press the trigger button on the BNC-2121 and hold for approx. 1 second. I then execute the Read statement, and I always get a timeout. From my experience working with NI, I'm guessing I don't have a channel property set correctly, but its not obvious to me and I can't find an example to do exactly what I'm trying to do.
The CTR2 designation in the code was the object name of the card. I have two 6602 cards in my chassis. I was using ctr0 of the second counter card, so PFI38/39 was correct.
Again, any help would be appreciated.

Using an external Clock with NI 6585

I have an interface board connected to a TI ADS6444 Evaluation board (QUAD serializer ADC), in turn plugged into my NI 6585/PXI-7954R, see the Project Screen shot. I can acquire data using internal clock but now I want to switch to an external clock. First I want to get the external clock working then do the unserializing. I am quite new to LabVIEW FPGA.
I get a variety of errors such as " The Read method for IO Module\DDCA_Data_Rd_Rise is used in a clock domain that does not support it. The supported clock domain is "IO Module Clock 0". To change the frequency of the supported clock domain, launch the properties dialog for the CLIP item in the LabVIEW project and choose the "Clock Selections" page." I have tried to configure the clock to fixed and variable frequencies, see clock properties screen shot.
Thanks in advance.
LeMur Technology Services, LLC
President
[email protected]
Toll Free: 877-761-2916
Cell: 609-577-2628
Fax: 215-862-9816
Attachments:
Project screen shot.jpg ‏164 KB
clock properties screen shot.jpg ‏77 KB

Update
Opened a service request. for this problem. Talked it over with NI engineer and thought the problem was because I disn't have the latest and greatest software versions e.g. RIO and LabVIEW. Compiled a blank VI using the DDC connector and comilied successfully. No matter what I do if I do a FPGA I/O Node call to DDCA_Data_RD_RISE (or fall) I get the error: "The Read method for IO Module\DDCA_Data_Rd_Fall is used in a clock domain that does not support it. The supported clock domain is "IO Module Clock 0". To change the frequency of the supported clock domain, launch the properties dialog for the CLIP item in the LabVIEW project and choose the "Clock Selections" page."
For grins I wired the FPGA I/O node Expected I/O module ID to the FIFO input and read a number (7488[HEX]).
Begining to suspect the NI 6585 CLIP has a bug?
LeMur Technology Services, LLC
President
[email protected]
Toll Free: 877-761-2916
Cell: 609-577-2628
Fax: 215-862-9816

External clocking proble with NI-DAQ 6534 after driver upgrade

Hello newsgroup,
I've got a Problem with a pattern generation using the NI-DAQ 6534.
I'm using it in 32 Bit Output mode with external clocking.
After changing the PC and the OS from a P II 333 Mhz running Win98
to a P 4 1,8 GHz running WinXP Pro the use of new drivers was nessasary,
because the old driver doesen't work at all. The following problem occurs
by using actual driver: Using my old programm external clocking doesen't
work anymore, but internal clocking works fine. I'm using C++ not Labview.
I'm not shure if this is the right newsgroup for my problem. If not please
give me a hint were it belongs to.
Regards
Michael

Michael:
What version of NI DAQ did you have? What version did you upgrade to? Is your 6534 a PCI board or is it an AT/ISA based device? Have you changed your code at all? You code should be fully compatible with a new version of NI-DAQ... Please provide more exact details of the problem so I can help futher. Are you getting errors or is it just not working?
Sincerely,
Brooks B
Applications Engineer
National Instruments

Processor 2.6 Bus 800 shows at XP with 200 External Clock

Hi ,
I have a Pentium4 2.6MHZBus 800, 256MB DDR Bus 400, MotherBoard MSI 865PE Neo2,HD MAXTOR 80G ,VGA GeoForce 4 8X G.Ward 128MB DDR
I upgrade the bios version to the latest 1.9 the i run "LOAD HIGHST PREFORMANCE
But : at the windows XP with SP1 i found the software with read the system configuration ..reading my processor with External clock "200"
Does it show the right ?
OR should it be shown As "800"
By the way the OverClocking on the setup is disabled
Can i use overclocking here? to what range?
Advice please
Thanks in Advace

Hi Wonkanoby,
Im little bit confuse , how can I get the optimum performace of FSB 800 of my processor ? Below is my CPU-Z report and my Computer Specs
Intel P4 2.6Ghz HT @ 2.9Ghz
MSI 865PE Neo2
Geforce FX5200 128MB DDR
80Gig Seagate 7200RPM and 40 Gig Seagate 5400RPM see-through (modified)
GENERIC 256MB DDR400 memory
Pixel View TV tuner
D-Link Internal Modem
Cooler Master AERO CPU Cooler running at 3900RPM
5 X Cooler Master Fan Casing
HEC Power Supply 350Watts
3.3V = 28Amps / 5.0V = 33Amps / 12.0V = 15Amps
MSI CD-RW 52x32x52
ASUS 16X DVD
Win2000 SP3
CPU-Z Report
CPU-Z version 1.20a.
CPU(s)
Number of CPUs 2 (1 Physical)
CPU#1 APIC ID = 0
CPU Name Intel Pentium 4
Code Name Northwood
Specification Intel(R) Pentium(R) 4 CPU 2.60GHz
Family / Model / Stepping F 2 9
Extended Family / Model 0 0
Brand ID 9
Technology 0.13 µ
Supported Instructions Sets MMX, SSE, SSE2
CPU Clock Speed 2925.0 MHz
Clock multiplier x 13.0
Front Side Bus Frequency 225.0 MHz
Bus Speed 900.0 MHz
L1 Data Cache 8 KBytes, 4-way set associative, 64 Bytes line size
L1 Trace Cache 12 Kµops, 8-way set associative
L2 Cache 512 KBytes, 8-way set associative, 64 Bytes line size
L2 Speed 2925.0 MHz (Full)
L2 Location On Chip
L2 Data Prefetch Logic yes
L2 Bus Width 256 bits
CPU#2 APIC ID = 1
CPU Name Intel Pentium 4 (logical unit)
Mainboard and chipset
Motherboard manufacturer MICRO-STAR INC.
Motherboard model MS-6728, 100
BIOS vendor American Megatrends Inc.
BIOS revision V1.7
BIOS release date 10/06/2003
Chipset Intel i865P/PE/G/i848P rev. A2
Southbridge Intel 82801EB (ICH5) rev. 2
Sensor chip Winbond W83627HF
FSB Select 533 MHz
Performance Mode enabled
AGP Status enabled, rev. 3.0
AGP Data Transfert Rate 8x
AGP Side Band Addressing supported, enabled
AGP Aperture Size 128 MBytes
Memory
DRAM Type DDR-SDRAM
DRAM Size 256 MBytes
DRAM Frequency 225.0 MHz
FSB:DRAM 1:1
CAS# Latency 2.5 clocks
RAS# to CAS# 3 clocks
RAS# Precharge 3 clocks
Cycle Time (TRAS) 6 clocks
# of memory modules 1
Module 0 DDR-SDRAM PC3200 - 256 MBytes
Software
Windows version Microsoft Windows 2000 Workstation Service Pack 3 (Build 2195)

Jitter of output digital waveform with external clock

Hi,
I need to generate digital waveform with 20 bits pattern * 1000 times. Digital waveform must be sync with 1 MHz external clock.
It is not big deal.
But there is additional requirement that digital waveform has jitter < 200 ps. It can be delayed for couple ns but it must be very stable.
Can anyone point me on that parameter? Or share your expirience?
Thanks!

Hi Andrei,
Tph on figure 3 is defined as tp - 2.2ns as we discussed earlier. The data jitter, along with channel to channel skew, is already taken into account. We don't specifically spec the data jitter since we have made this calculate for you. It is safe to say that the data jitter involved in tph is less than 200 ps however this is not a standard spec we provide.
As for additional board recommendations, what is your application? The 6562 is designed for LVDS applications. The 655x series is highly recommended for high speed TTL based applications. If you reference the 655x manual you will notice similar or better specifications in regards to setup and hold times, which again already take into account data jitter and skew.
I am curious as to why you would like the specific values documented. We provide the current specifications so that you do not have to use the individual statistics to calculate numerics such as the setup and hold times. Is there something specific you are trying to do here? You mentioned a simple example earlier, what is your actual application?
Regards,
Chris Behnke
Sr. RF Engineer
High Frequency Measurements

DIO Pattern with external clock

I use Pattern Input with external clock, I only wire external clock to REQ pin, I see how frecuency vary, but I do not receive data but the one that was latched last time, Do I need to wire something else in order to receive correct and continuos data? I think I just need a singnal to get data latched every time I require trought external clock. What do I have to do to get my application running?

It sounds as though you are using a NI-653X data acquisition board to perform Pattern Input. When performing Pattern Input, data is transferred upon the rising or falling edge (user configurable) of each clock pulse. This clock signal can be externally provided or internally generated. To use an external clock signal of up to 20MHz, simply connect the signal to the REQ pin as you are doing.
I recommend trying a LabVIEW shipping example already set up to do pattern input. The particular example I am thinking of gives you the option to try either an internal clock or provide an external clock. I would recommend trying each option. I do not know which version of LabVIEW you have but will provide the path to the example in LabVIEW 7; the path is very simi
lar in earlier versions of LabVIEW:
Help >> Find Examples >> Hardware Input and Output >> DAQ >> Digital Input and Output >> 653x >> Cont Pattern Input.vi
I hope this helps!
Sonya

External clock LabView crash with Measurment Computing board.

Hi,
I'm using a Measurment Computing PCI-DAS6402-16 board with Labview (using Universal librarys VIs) in a 4-stroke engine DAQ application and amognst the signals obtain Internaly clocked, there is In-Cylinders Pressure signal which is timed with a Crank-angle deocoder sending analog pulse signal.
Although there seems to be no problem while the motor is running, it appears that when to external clocked signal is not getting any pulses (while the motor is not running) then Labview stops to respond and awaits for the external clock to start, and that doesnt happen within 10s then it crashes.
I dont know whether it is Software problem (because external and internal clocked signals are both in the same WHILE LOOP) or if it is a Hardware problem (because With a NI card there seem to be no problems).
THNX in Advance

Well it couldnt be a more typcal windows crash:
If a channel is externally timed with an analog pusle signal, If the VI starts running but the external clock isn't then:
-Labview stops to respond to any clicks (there is no .exe at this point) but it keeps working though (That i know cause if i start the ext. clock at this point it "un-stucks' and starts working)
-But, if for some secs no ext. pulse signal is generated then labnview app stops respondin and i get the typical 'send error report' window.
Could it be that the Universal library for Measurment Computing boards haw a bug? Cause the same thing happens with the "Analog input External Clock.vi" example given with the Library..so it can't be my mistake..or can it?!

Use external clock (PFI2) with Traditional DAQ

Can figure out how to specify the external clock line (PFI2) while using Traditional DAQ (7.4.2f3).
Can anyone help? TIA.
George
George Zou
http://webspace.webring.com/people/og/gtoolbox

I never used such a configuration but I found an example that will probably be helpful for your problem: it's named SCANsingleBufExtScan and you will find it in samples\daq\ai folder on your hard disk.
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

Ni5640R sync with external clock

Hi,
I have a highly stable 10MHz sine source, and I need to phase-lock NI5640R's internal 200MHz generator to it.
I don't really understand half of the parameters in "Config Timebase". Any advice on how to do this?

As I understand it, in:
CDC Clock Source tab:
* Clock Source = VCXO, since I need not external clock, but internal oscillator locked on external signal
VCXO tab:
* VCXO Control = PLL, since VCXO frequency will be controlled by external clock via PLL
* VCXO Enable = ON, obviously
Reference tab:
* RTSI Ext Ref Enable = OFF
* SMB Ext Ref Enable = ON, since this is the external signal source
* Clk100 Ref Enable = OFF
* RTSI(7) Direction = OFF, don't know what it is, but doesn't seem relevant
PLL tab:
* Ref Delay = 0ps, I only care about phase stability at the moment, so delay is not relevant
* VCXO Delay = 0ps, same here
* Ref Divider = 10, this divides 10MHz external reference to get 1MHz
* VCXO Divider = 200, this divides 200MHz internal generator to get 1MHz, then both 1MHz freq's are synchronized
* CP Current = 2.5mA, but I have no idea what this does
* CP Enable = NO, no idea
* CP Invert = NO, no idea
* PFD Pulse Width = 1500ps, (CDC7005 datasheet states, that PFD pulse is something that improves spurious suppression) I have no idea how wide the PFD pulse should be, I guess it depends on external source quality
* Lock Detect Window = 1.2ns, as I understand it, PLL is considered locked when rising edge of controlled signal of is in this window, so smaller window means less jitter
Routing tab:
* PLL Feedback Channel = Y2, this is by default, I don't know if this should be touched. This is also a bit confusing, since the choice is between [Y0, Y1, Y2, Y3, Y4, Y3, Y3, Y3]. I wonder how these Y3's are different?
* Y0 (ADC0) Division = divide by 2, Y0 Enable = YES, I see no need to modify this
* Y1 (ADC1) Division = divide by 2, Y1 Enable = YES, same here
* Y2 (DAC0) Division = divide by 2, Y2 Enable = YES, same here
* Y3 (DAC1) Division = divide by 2, Y3 Enable = YES, same here
* Y4 (RTSI Ref) Division = divide by 2, Y4 Enable = YES, same here
Misc tab:
* OPA Enable = FALSE, OPA is a enable/disable control for amplifier. I'm not really sure about what it does and if this is even connected in NI5640R, default is off
* Enable Ext Ref R = FALSE, may be something related to what I need, by default it is off
* Hold = FALSE, as I understand, when this is enabled, PLL tries to maintain lock when missing reference cycle, probably may be used for clock extraction from serial data stream. for this application it's not necessary
* NPD = TRUE, according to CDC7005 datasheet, NPD is asynchronous power down, and should be held high
* NRESET = TRUE, asynchronous reset signal, should be held high
* Bandgap Enable = TRUE, not sure what bandgap is, and I don't think it's relevant
External tab:
* HW NPD = TRUE, should be hardware power down
* HW NRESET = TRUE, hardware reset

How do I associate a clock (source) with a (or multiple) counter channels

We are newbies using a 6602 with the SCB-68 interface.
We are reading 8 different TTL pulse trains. We've determined that we need buffered periodic event counting (BPEC) and that we need a common clock (source).
We've used the measurement and automation software to confirm that we can see our signal coming into the card. However, we cannot seem to perform functions requiring a clock (e.g. BPEC).
Question: How do we associate an 80 MHz clock to the source for our counter channels? The the card has clocks, yet our error messages indicate that an external clock had to be used for our task. We may be stuck in the meaning of "external". Though a clock is in the card, is it considered external to my counter channel? Do I connect it via jumpers in the SCB-68 or are there ways to associate it via commands?

Hi NHJared,
There a few examples in the LabVIEW Example finder that will
help you make these measurements. (Help
>> Find Examples >> Hardware Input and Output >> DAQmx
>> Counter Measurements >> Period or Pulse Width)
The DAQmx Timing VI should be set to implicit. This setting will automatically route the appropriate
clock necessary for your measurements.
An external clock is a signal that is created by another device other
than the PCI-6602 and connected through an external pin on the PCI-6602 (e.g. PFI
pin)
Respectfully,
Rob F
Test Engineer
Condition Measurements
National Instruments

Need to be Able to use a TB-1328 with an SCXI-1125

I need some labview code to show me how to read temp from a SCXI-1125 with a TB-1328 thermocouple on it. I have a K type thermocouple wire, I have to stick with Labview V7.0, NI-DAQ 6.9.3f5, and this is running on an RT machine using a PXI-1010 split PXI/SCXI chassis, with a PXI-6040E running the SCXI bus. Please if you could, tell me how to remote DAQ configure this. Thank you.

Hello,
If you have NI-DAQ 6.9.3 support installed for LabVIEW 7.0, then you should have an example which will show you how to acquire a thermocouple reading from a SCXI-1125. The example which I am referring to is called "SCXI-1125 Thermocouple.vi". Regardless of what terminal block you are using with the SCXI-1125, you need to make sure that you configure it accordingly in Measurement and Automation Explorer.
For assistance with Remote DAQ configurations, please refer to the following knoweldgebase: What Do I Need to Know to Set Up My Remote SCXI System?
Regards,
Jared A

Sample with an external clock with a SCXI 1140 (8 channel sample/hold amplifier)

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