I want to expand analog inputs (mic)

Hi all!
I need for a new project more analog mic inputs (incl. phantom power)
With logic I use the motu 828. I want to use the adat input for extra analog inputs. Can one of you give me some advice which converters there on the market. I know there is a converter from behringer the ADA8000, but several people told me that the pre-amps of this unit are not very good.
So which converter will work with the motu and logic.
Thanks and warm regards
jasja

Mackie, Presonus and Focusrite all have great products that'll give you 8 channels of pres to ADAT. If you want something cheaper, M-Audio also has one.

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Labviewcode wanted to count pulses from analog input

Can somebody help me with the following problem?
I don't have a Data Aquisition board so I use my steppermotor controller, the MID-7604, and it's analog input to read from a
sensor (photointerrupter) which outputs 0 or +5 Volts. I want to count how many times an output of 5 Volts appears.
The problem is that the signal is not a Waveform, so the Daq functions in Labview won't work. I've tried to generate a waveform
from the signal but also no results.
What I have created now is a counter which counts every signal above an adjusted value. The problem is that it counts on and on
when the signal is above the value, I want it to count one time. (like a trigger which detect a low to high level signal)
In the attachment you see that program and an other I've found (event counter) doing what I want, but I haven't been able to transform it in to
my own problem. Please help me on this because I'm stuck right now.
Thanks in advance
Message Edited by Trabuca on 07-04-2005 02:56 AM
Attachments:
monitor ain pulses with display.vi ‏31 KB
Event_Counter.vi ‏39 KB

Hi,
there are some ways - one is using a shift-register.
Attached is a flank detector - each time "Boolean" changes from 0 to 1 or 1 to 0 the count is increased by one.
I hope that helps
Greez
Stefan
Message Edited by mycroft on 07-05-2005 06:41 AM
Message Edited by mycroft on 07-05-2005 06:41 AM
Attachments:
Change detector_LV.GIF ‏9 KB

Analog inputs no longer working on Audigy 2 ZS Platinum Pro's external dr

I have an Audigy 2 ZS Platinum Pro. After two years of use without problems, the analog inputs on the external dri've have stopped working. I get no signal from them, not even noise. All 3 inputs are silent, Line in / Mic and Line 2 in the front, and Line 3 in the back. Otherwise the dri've appears to function normally - I get output from the headphone jack, and the volume control knob works. I have not tested digital inputs or outputs, as I currently have no digital devices to connect to them.
I had made no major changes to my computer - software or hardware - when the problems began. I recently added a new SATA hard dri've, but the Audigy dri've did work after that.
I've taken steps suggested in another thread on this forum and uninstalled all Creative software and drivers, used the latest driver package's uninstall program as well as Driver Cleaner, and finally manually deleted everything related to Creative and Audigy from the system registry (and rebooted quite a few times in between). I then installed the original drivers from the CD that came with the sound card (a setup that has worked before), but still the problem persists.
Any ideas on where to even begin looking for a solution? I find it hard to believe that it's a hardware problem, since three inputs suddenly went silent at the same time, and no other connections were affected. Yet I've done as clean a reinstall as possible, and that hasn't solved the problem.
My current computer configuration:
OS: Windows XP Pro (SP2 and all latest updates)
CPU: Athlon XP 500+
RAM: 2x 52 MB
Motherboard: Abit AN7 (integrated sound chip disabled)
Video card: Sapphire Radeon 9800 Pro
Network card: D-Link DFE-530TX
Hard dri've : Seagate ST320026A, 20 GB IDE
Hard dri've 2: Maxtor 6L080J4, 80 GB IDE
Hard dri've 3: Seagate ST330083, 300 GB SATA-II

I don't have a Platinum Pro or the dri've, but a general hardware troubleshooting step I would take would be to remove the soundcard and either move it to another slot or re-seat it. Also, I'd disconnnect and reconnect all cables to and from the card and the dri've. If I had another machine I could try the card or dri've in, I'd do that. If I could borrow another dri've or even another card, I'd test those too. (Swapping parts is often the simplest diagnostic.) Yeah, maybe it's not a hardware problem, but I'd take these steps just to rule out some possibilities.
Edit: And if you can remove or disconnect the SATA dri've and restore the system to the condition before you installed it, that's another good test.Message Edited by Katman on 2-8-2005 2:56 AM

How do I use the analog input (ADC) to drive a motion profile in MAX

We are trying to use an anolog input signal from a DAQ card to control the motion contol axis. For now, we want the motor speed to follow a sinusoidal voltage waveform, and later on, we will be using a more complex velocity profile.
In order to accomplish this task, we have searched the user forum, and found information suggesting to operate the servo motor in 'slave' mode under the 'gearing' option. Therefore, we have set the Gear Master to 'ADC Channel-1', Mode set to 'absolute', Gear ratio 1:1, and provided the sinusoidal voltage (+/- 5V, 3 Hz) to the AIN1 connector on the MID-7654 controller. When using the 1-D Interacitve 'single axis' control panel, the motor runs at constant speed in one direction only. It does not react to the sinusoidal speed profile request as we expected.
How do we 'turn on' the 'slave' mode in MAX? Please talk us through the necessary steps and settings? Thanks.
Staffan

Staffan,
you can configure and enablethe Gearing mode in MAX and it should be activated after saving the settings and initializing the board. In 1D-Interactive you can't use Gearing. For better flexibility I recommend not using MAX for configuring and enbling Gearing. You better should do this in your application.
In fact there is a perfect LabVIEW-example that ships with the NI-Motion driver (Master Analog Input - Slave Axis Gearing.vi)
I hope this helps,
Jochen Klier
National Instruments
Message Edited by Jochen on 10-02-2007 08:37 AM
Attachments:
gearing.jpg ‏162 KB

I am getting a -50101 error when trying to get analog input from a compact rio

I am just doing the initial setup of my compactRIO system and have been able to successfully add the cRio in Max and then into a new project. I created a very simple VI with analog input that I am trying to read into an indicator, following one of teh tutorials. The module I am reading the input from is a cRio-9201. The input is voltage. I have already added the module to teh project under the FPGA, which is under the RIO in the project tree. Any ideas what I may be missing would be greatly appreciated!
Thanks

The 9201 C Series module needs to be created under the FPGA Target
(cRIO-910x) in the LabVIEW Project. You can either discover the module
or create it by type. In case you haven't created the FPGA Target
(cRIO-910x) under the cRIO Controller (cRIO-900x), you must do that
first. You also have the option of discovering the cRIO-910x or to
create it by type. I suggest you do it through discovery, so you don't
need to manually configure the addresses.
As how to create the items, that's done through right-click on the
cRIO-900x and select New>>Targets and Devices.... It will pop up
a dialog in which you expand FPGA Target and it will discover the FPGA
Target. Similar steps are followed to create the 9201 module.
If you don't see the FPGA Target and C Series module options, then you
need to make sure NI-RIO 2.0 is installed in you computer.
JMota

Audigy 4 Pro Hub Analog inputs problem

&Analog inputs in Audigy 4 Pro external hub seem to be unsupported in Windows 7. Am I wrong?
I installed latest drivers, set mixer to monitor sound from line in, also tryed win ASIO, but I am unable to get any sound from Line in/Mic in.
Please help me clarify this issue, I?ve been trying to find an answer through different forums for hours! Thanks

Issue solved... line in /Mic is now working. Audigy 4 pro analog input is supported using latest windows 7 drivers.

How to get signal from analog input and send it to analog output (real-time)

Hi everyone,
I am doing simple task in Visual C++ and I am using PCI-6221(37 pin).
Basically, I want to send same signal from 'analog input' to 'analog output'
at the same time (almost), to make it real-time application.
Can someone please provide me sample program.
I would appreciate if you could provide me with the good tutorial which explains
step by step everything about programing NI-DAQmx for C/C++.
Best Regards,
Khassan
Solved!
Go to Solution.

This is my code in C++, you can optimize it if it looks too messy. This code reads signal from analog input and outputs it through analog output.
To make this code work additional include directories and library directories must be added from NI.
I hope it helps someone.
#include <stdio.h>
#include <conio.h>
#include "NIDAQmx.h"
#include <math.h>
#define DAQmxErrChk(functionCall) { if( DAQmxFailed(error=(functionCall)) ) { goto Error; } }
int main(int argc, char *argv[])
int32 error=0;
TaskHandle taskHandleRead=0,taskHandleWrite=0;
int32 read=0;
float64 dataRead[1000];
char errBuffRead[2048]={'\0'};
char errBuffWrite[2048]={'\0'};
bool32 done=0;
int32 written;
DAQmxErrChk (DAQmxCreateTask("",&taskHandleRead));
DAQmxErrChk (DAQmxCreateAIVoltageChan(taskHandleRead,"Dev1/ai0","",DAQmx_Val_Cfg_Default,-10.0,10.0,DAQmx_Val_Volts,NULL));
DAQmxErrChk (DAQmxCfgSampClkTiming(taskHandleRead,"",100.0,DAQmx_Val_Rising,DAQmx_Val_ContSamps,0));
DAQmxErrChk (DAQmxCreateTask("",&taskHandleWrite));
DAQmxErrChk (DAQmxCreateAOVoltageChan(taskHandleWrite,"Dev1/ao0","",-10.0,10.0,DAQmx_Val_Volts,NULL));
DAQmxErrChk (DAQmxCfgSampClkTiming(taskHandleWrite,"ai/SampleClock",100.0,DAQmx_Val_Rising,DAQmx_Val_ContSamps,1000));
DAQmxErrChk (DAQmxStartTask(taskHandleRead));
DAQmxErrChk (DAQmxStartTask(taskHandleWrite));
while( !done && !_kbhit() )
DAQmxErrChk (DAQmxReadAnalogF64(taskHandleRead,1,10,DAQmx_Val_GroupByScanNumber,dataRead,1000,&read,NULL));
DAQmxErrChk (DAQmxWriteAnalogF64(taskHandleWrite,read,0,10.0,DAQmx_Val_GroupByChannel,dataRead,&written,NULL));
_getch();
Error:
if( DAQmxFailed(error) )
DAQmxGetExtendedErrorInfo(errBuffRead,2048);
DAQmxGetExtendedErrorInfo(errBuffWrite,2048);
if( taskHandleRead!=0 )
DAQmxStopTask(taskHandleRead);
DAQmxClearTask(taskHandleRead);
if( taskHandleWrite!=0 )
DAQmxStopTask(taskHandleWrite);
DAQmxClearTask(taskHandleWrite);
if( DAQmxFailed(error) ){
printf("DAQmx Error: %s\n",errBuffRead);
printf("DAQmx Error: %s\n",errBuffWrite);
printf("End of program, press Enter key to quit\n");
getchar();
return 0;

Analog Input and Output in One Single VI

I need help in setting both analog input and output in one single VI. How do I assign channels to be either input or output? How do I simultaneously uses both in one single VI with a while loop structure?? Which AO am I suppose to use to obtain signal from the function generator I have built to feed into the DAQCard-1200?? Help!!
Attachments:
Test1.vi ‏48 KB

One thing you'll need to be aware of is that you will need to DMA lines: one for AI and one for AO. If you don't, then you can configure the DAQCard to do without DMA using the Config VI. But you certainly can do this.
As far as your function generator, you will want to do a buffered analog output. You will write your buffer of points to the buffer, and then tell NI-DAQ how fast to update your analog output channel with these values.
So, you can be reading from AI and checking the AO process in the same while loop. Just make sure you handle the while loop execution (the wait it exits) correctly. This can get tricky when you're doing two types of measurements.
J.R. Allen

PID Control - analog input, digital outputs

Hello everyone,
I am trying to use the PID toolkit to convert my existing feedback control system to one using PID or just PI whatever works best. Problem is that the tutorials out there discuss in detail about obtaining Analog inputs and using the PID output to control an analog output. Are there any tutorials that show how I can control my process variable which is an analog input by using the PID output to generate digital outputs?
Basically, what I am doing is controlling the incline of my device with two digital outputs that control two solenoid valves. The angle is calculated from a calibration curve that plots distance sensor voltage with Angle. Any help would be immensely apprecitated. I want to try this out on my own before I post some vi's. Thanks!
V
I may not be perfect, but I'm all I got!

That is exactly what I am doing currently. I have error bands specified around the target to make sure that it doesn't oscillate. But, under load conditions such as pulsed load conditions, the device goes out of bounds and the values trigger to correct for it. But, what I need is seemless or atleast seemless correction. Currently what I see is sudden adjustments to the incline. Please find attached what I am currently using. I am trying to get a more finer solution if at all possible.
Note: Within 5% of the target = NO action
Between 5% and 15% = Pulsed ACtion ( DO On for Pulse width time)
Greater than 15% = continuous action until it reaches Pulse band
I may not be perfect, but I'm all I got!
Attachments:
TDML_subElevationControl.vi ‏41 KB
TDML_subPulsedValveFuntion.vi ‏16 KB

Connecting OxyGuard Model 420 - Dissolved Oxygen Sensor- to FieldPoint 1601 , FP-AI-110 analog input

Hello,
i have OxyGuard Model 420 (Dissolved Oxygen Sensor 4-20 ma)
that i want to connect to my FieldPoint 1601 , FP-AI-110 analog input.
i'm using LabView 7.1
this sensor have 2 wires, and i dont want to make mistakes and destroy the sensor,
how i connect it ,physically to the FP ?
do i need to connect the sensor to the VC in the FP module ?
if someone can post a sketch of the Circuit i will be more than happy.
thanks in advance.
mor

hello mor
As all 2 wire-current sensors, the Oxyguard Sensor must be connected to the power source = Vsup terminal with the Brown_wire , not to the COM !(channel 0 , number 17 in the FP-AI-110 module)
the Blue_wire u connected OK to Iin (channel 0 , number 2 in the FP-AI-110 module) .
See also in the Connection Example at the end of the link u attached.
We use the same sensor & configuration for a long time in Fishery Control Systems.
I have no explanation wy its look fine in MAX with the old connections .
Hope it help u
Shimon
Try to take over the world!

PXI-6230 analog input trigger setup

Hi,
Can anyone point me in the right direction of how to configure the PXI-6230 card to implement 3 of the analog input channels as a digital input trigger? The input to each channel is TTL pulses. I want to have a trigger event on every pulse from any of the three inputs. I'm using LabVIEW 8.5. Any help is appreciated. Thanks.

Hey HarveryL,
I'm not sure it is possible to do this. Can you give me some more details on your application, and why you want to use the analog inputs as a digital trigger? Here is an article on how to use PXI triggers with the analog input and output, perhaps you can adapt that code to your purposes. I'll continue to look into this for you, but any more information you can provide would be appreciated. Have a great week!
John B.
Embedded Networks R&D
National Instruments
Certified LabVIEW Developer

Can the analog inputs be daisy chained to measure higher voltages?

Can the analog inputs of a PXI-6289 be connected in series to measure higher voltages than normally allowed at the analog inputs of the PXI-6289 (i.e. 10 VDC)? For example, let's say I wanted to measure 18 VDC using an analog input channel of the PXI-6289. I would then pick two AI channels and connect the positive of one to the negative of the other and then the two remaining leads would be placed across the 18 VDC. Resistors could also be placed across the 18 VDC to form a votage divide. One AI would measure the voltage across one resistor and the other AI would measure the voltage across the remaining resistor. I have tried this and the voltage measurements appear to loose accuracy. Thank you for your help.

Hello Rafi,
You may want to invest in a high voltage attenuator for signal conditioning prior to reading the signal. The documents below may also be helpful:
High Voltage and Isolated Measurements
http://zone.ni.com/devzone/cda/tut/p/id/10693
High-Voltage Measurements and Isolation
http://zone.ni.com/devzone/cda/tut/p/id/3410
Regards,
Roman Sandoval | National Instruments | RF Systems Engineer

How do I get a 100 V 100 Hz signal into a NI PCI-6111 analog input?

I have a 100 volt 100 Hz signal that I want to bring in on NI PCI-6111 analog input (+/- 5V input). Is there some small off the shelf transformer or other type of signal conditioning I should use? Basically I just need to time stamp other analog inputs with this one coming on.

The PCI-6111 has a built in attenuator to allow up to 42V inputs. In order to read 100 volts you will have to use some sort an external attenuator. National Instruments offers several different modules and terminal blocks in the SCXI form that would accomplish this.
I would recommend reading through this KB for more information.
http://digital.ni.com/public.nsf/websearch/38AEFF122C8D732F8625629800519927?OpenDocument
I hope this helps.
Joshua

NI DAQmx Digital Output Trigger To Start Analog Input Task

Hi everyone. I am using the NI DAQmx VIs to set a digital output line low (boolean '0'). I want to begin reading an Analog Input voltage (Start Analog Input Voltage reading task) right after the digital output line is set low. I am using the DAQmx Start Trigger (Digital Edge).vi to try and do this. I have the digital edge to trigger off a falling edge since the digital output line is being set low. I am using "do/SampleClock" as the source into the DAQmx Start Trigger (Digital Edge).vi.
I don't have the DAQ card (PXI 6229) since someone else is using it but I wanted to write up the SW so that when it becomes available I can have SW to try out.
I have attached the VI. Am I setting up this VI correctly?
Thanks!
Attachments:
Trigger AI Task Off DO Edge.vi ‏32 KB

I think you are going to have to wire that Digital Output to a PFI line on the card with the Analog Input(s). You then trigger on that PFI line.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
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Programming Analog Input Registers for MSeries NI-6221

I am trying to understand the Preliminary M Series Register Map in order to correctly setup and acquire data from the Analog Input channels of my PCX-6221 card. I have been able to figure out the DIO locations and use them but I am having trouble understanding what I have to do to configure and acquire data using the Analog Input registers of the card. I need to program at this level for an RTX application using Microsoft Visual Studio Net 2003 and have had great success doing so with other NI Cards. I have tried looking at the examples provided by the MDDK but I haven't been able to create a environment that allows me to compile them with Chipobjects and it appears like alot of the work is hidden by the subroutines.
I wonder if someone had a high level algorithum using the Register Map it would help out alot.
Questions:
How would I create a multiple channel Scan List and load it into the card setting gain etc...
How would I configure the card to acquire continously at a specified freq (ex 1000 samples a sec)
How would I start/stop acquisition
I would guess getting the status of the FIFO and accessing the FIFO is a matter of reading the AI_STATUS_1 and AI_FIFO_DATA locations
Would looking at the Register Programming Manual for the "E" Series help me or just get me more confused?
Thanks in advance for any light you can shed on the subject.
Floyd

Hi Floyd-
Let me address your questions individually:
How would I create a multiple channel Scan List and load it into the card setting gain etc...
A multi-channel scanlist can be created as shown in the method aiConfigureChannel() from ai.cpp in the M Series MHDDK \Examples folder. Note that the other operations leading up that point (notably, aiClearConfigurationMemory() must be performed in the order shown in the various AI examples. aiex3.cpp is the most useful starting point for investigation, in my opinion.
How would I configure the card to acquire continously at a specified freq (ex 1000 samples a sec)
aiex3.cpp shows how to setup the device and its DMA controller (aka the "MITE") for DMA operation. In order to configure for continuous operation you set the "continous" flag in that example to kTrue. The effect of that setting is to program the STC-II to generate either a finite or continuous AI sample clock. This programming is performed in the function aiNumberOfSamples() from ai.cpp and has the effect of setting the appropriate bitfield for continuous operation in the AI_Mode_1 register.
Earlier in your post you asked if the STC Technical Reference Manual ( http://digital.ni.com/manuals.nsf/websearch/E929838D7D0EE50986256728007FEADF ) would be a good reference. In fact, it's a great reference from the perspective of understanding the bitfield/register names and understanding the basics of how the timing hardware works (for example BC, UC and other sample counters are all functionally equivalent in the STC and STC-II). From the perspective of actual register writes and reads, the functionality is different between E Series and M Series. The biggest difference, as another forum user alluded, is that we map and write directly to the registers on M Series so Windowed_Mode reads and writes are no longer necessary.
Another difference between STC and STC-II is that the STC-II uses NI TIO-style counter/timers. For that reason, the NI 660x RLP manual ( http://digital.ni.com/manuals.nsf/websearch/4CE1C778F442B01386256C870060F9F3 ) would be a good reference for M Series counter/timer operations.
How would I start/stop acquisition
Assuming you don't need an external start trigger, you only need to write to the strobe bit AI_Command_2->AI_START1_Pulse. This will create a single start trigger pulse internally. The differences between AI_START1 and AI_START are described in the STC Technical Reference Manual.
A finite acquisition would be stopped automatically by the AI timing engine based on the number of samples you program via the method shown in aiNumberOfSamples(). Continuous AI would be stopped by first stopping the DMA operation and then calling aiReset().
I would guess getting the status of the FIFO and accessing the FIFO is a matter of reading the AI_STATUS_1 and AI_FIFO_DATA locations
Yes, this would work but I would strongly suggest using DMA as shown in aiex3.cpp. If you want to use "programmed I/O" to read the FIFO data directly, that method is shown in aiex2.cpp
Would looking at the Register Programming Manual for the "E" Series help me or just get me more confused?
In many cases it would be very helpful. See my comments, above.
I have inherited code that works on 65xx cards which I am pretty sure uses windowed mode that I am using in this 6221 driver. I have found that I can set the PLL registers to act as DIO and I can read the Discrete inputs just fine. Makes me curious, if Windowed mode is not used doesn't that mean the addresses are relative to the BAR1 address? Why then am I able to read the DIO?
I'm not sure why this would work- it's possible that some legacy functionality is still working due to the way you access the hardware in your code. For full functionality with M Series you must use mapped memory I/O to write and read from the device's registers.
Also starting with Clock_and_FOUT according to the example I set it for Slow_Internal_Timebase. But when I read back that Address it is always zero. According to the register map it is a "write". Does that mean I can't read it's contents? Or do I seem to have a problem because I am trying to use windowed mode with this card.
Yes, the "write" registers are write-only and the "read" registers are read-only. The effect of data read from or written to "write" or "read" registers, respectively, is undefined.
Hopefully this helps-
Tom W
National Instruments

I want to expand analog inputs (mic)

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