How to wire up and use 256 points at a time on the PXI-2532

I have a PXI chassis with a PXI-2532 512-Crosspoint Matrix Switch Module, a TB-2640 connected to it, and a PXI-4072 FlexDMM and LCR meter.
I am trying to use the DMM to make measurements of something connected to the switch matrix. What I can't seem to figure out, is since the matrix is a 1 wire 4x128 matrix, how do you connect 256 points when there are only 128 conductors in the ribbon cables that attach to the 2640? There are 2 banks of 8, each with 16-pins, on the TB-2640, that seem to be wired internally together. I would like to utilize 256 points in the 512 matrix at a time, and currently I have the DMM hooked up to r0 and r1 to take the measurements. How would I hook up r2 and r3, in the same matrix?
If you are really confused I can explain further, but I haven't found anything that shows how you would actually connect 256 wires to the 2532, when there are only 128 columns. Any information helps.
Thank you.

Since the matrix is a 4x128, there are 4 rows and 128 columns to which you can connect devices under test (DUTs). You can not connect 256 different DUTs because there are not 256 connections. The points refer to the switches inside the card rather than the actual signals.
Here's a bit more info:
http://www.ni.com/white-paper/4453/en#toc3
Also I would post future switch questions here:
http://forums.ni.com/t5/Switch-Hardware-and-Software/bd-p/320
I hope this helps,
Eric E.

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The sensor requires a swept frequency excitation (typically 400 to 1500 Hz) and then generates a frequency output proportional to the strain applied on the vibrating element. The frequency (roughly upto 1kHz) needs to be measured.

What sort of resolution is needed on the frequency sweeping? There are currently four FieldPoint modules that can be used for generating pulsed outputs; the FP-CTR-500, FP-CTR-502, FP-PWM-520 and FP-PG-522. For the remained of this posting, I will use FP-CTR-50X to represent both the FP-CTR-500 and FP-CTR-502 as they are identical in functionality, different in their input/output stages.
The FP-PWM-520 is a Pulse Width Modulation output with 12 bit resolution on duty cycle and 16 bit resolution on the pulse period. The period is adjustable from 1 to 655535 milliseconds, which makes the module slightly less than ideal for frequency sweeping as it's highest frequency is 1 kHz and it's second highest frequency is 500 Hz.
The FP-PG-522 is a Pulse Generator module that can operate in an continuous pulse mode. The On Time, Off Time and resolution (time base) are adjustable. The smallest time base is 100 ms, for a maximum output frequency of 5 kHz. Like the FP-PWM-520, the FP-PG-522 adjusts it's output rates by changing the time rather than the frequncy, making it difficult to smoothly sweep across frequencies.
Finally, the FP-CTR-50X modules may be used. The FP-CTR-50X modules have 8 16 bit counters, 4 Gates and 4 outputs. The module has two internal clocks, 1 kHz ad 32 kHz that can be used to feed the counters. The outputs can be configured to toggle each time an adjustable terminal count is reached, allowing output pulse generation of up to 16 kHz (32 kHz internal clock divided by 2). The FP-CTR-50X modules have the advantage over the above modules in that the counters can be cascaded and set for differing terminal counts allowing multiple pre-scalers which may allow better resolution of generated frequncies.
For measuring the output frequency generated by the gauge, the only current modules that will allow you to directly measure the output are the FP-CTR-50X modules. However, as they were primarily designed for event counting, it takes a little bit of extra programming to allow them to be used to measure frequencies. The effectiveness of frequency measurement on the FP-CTR-50X modules varies on the sampling period, the programming and the network module. There are several KnowledgeBase and Developer Exchange articles talking about how to use a FP-CTR-50X module to measure frequencies, so I will not duplicate the information in this post.
Regards,
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Re: How do you create and use "common" type classes?

Hi,
You have 2 potential solutions in your case :
1- Sub-class TextNullable class of Framework and add your methods in the
sub-class.
This is the way Domain class work. Only Nullable classes are sub-classable.
This is usefull for Data Dictionary.
The code will be located in any partition that uses or references the supplier
plan.
2- Put your add on code on a specific class and instanciate it in your user
classes (client or server).
You could also use interface for a better conception if needed. The code will
also be in any partition that uses or references the supplier plan where your
add on class is located.
If you don't want that code to be on each partition, you could use libraries :
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GenericArray add-on) with the "QuickSort & List" sample on my personal site
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Daniel Nguyen
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http://perso.club-internet.fr/dnguyen/
Robinson, Richard a écrit:
I'm relatively new to forte and I'd like to know how can you handle utility
type classes that you want to use through out your application? Ideally
what I want is a static class with static methods.
Let's say that I have a StringUtil class that has a bunch of methods for
manipulating strings.
My problem is that we have code that runs on the client and code that runs
on the server. Both areas could use the StringUtil class, but from what I
understand, I have to create StringUtil in a plan and then create a server
object of type StringUtil. The server object will eventually get assigned
to a partition. That's not good since I really want the server object to
physically reside at the server end and at the client end. (Actually, I
don't want a server object, I just want to invoke a static method of a
static class).
Any clues on how to solve this problem would be appreciated.
Also, what is the url at Sage-it that has a summary of all emails that have
been posted to [email protected]? Perhaps this question has been
answered previously.
Thanks in advance
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/>-
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/>

Hi Richard,
Your question about "utility classes" brings up a number of issues, all of
which are important to long-term success with Forte.
There is no such thing as a static method (method that is associated with a
class but without an implicit object reference - this/self/me "pointer") in
TOOL, nor is there such thing as a global method (method not associated
with a class at all). This is in contrast to C++, which has both, and
Java, which has static methods, but not global classes. Frequently, Forte
developers will write code like this:
result, num : double;
// get initial value for num....
tmpDoubleData : DoubleData = new;
tmpDoubleData.DoubleValue = num;
result = tmpDoubleData.Sqrt().DoubleValue;
tmpDoubleData = NIL; // send a hint to the garbage collector
in places where a C++ programmer would write:
double result, num;
// get initial value for num....
result = Math::Sqrt(num);
or a Java programmer would write:
double result, num;
// get initial value for num....
result = Math.sqrt(num);
The result of this is that you end up allocating an extra object now and
then. In practice, this is not a big deal memory-wise. If you have a
server that is getting a lot of hits, or if you are doing some intense
processing, then you could pre-allocate and reuse the data object. Note
that optimization has its own issues, so you should start by allocating
only when you need the object.
If you are looking for a StringUtil class, then you will want to use an
instance of TextData or TextNullable. If you are looking to add methods,
you could subclass from TextNullable, and add methods. Note that you will
still have to instantiate an object and call methods on that object.
The next issue you raise is where the object resides. As long as you do
not have an anchored object, you will always have a copy of an object on a
partition. If you do not pass the object in a call to another partition,
the object never leaves. If you pass the object to another partition, then
the other partition will have its own copy of the object. This means that
the client and the server will have their own copies, which is the effect
you are looking for.
Some developers new to Forte will try to get around the lack of global
methods in TOOL by creating a user-visible service object and then calling
methods on it. If you have a general utility, like string handling, this
is a bad idea, since a service object can reside only on a single
partition.
Summary:
* You may find everything you want in TextData.
* Unless you anchor the object, the instance will reside where you
intuitively expect it.
* To patch over the lack of static methods in TOOL, simply allocate an
instance when required.
Feel free to email me if you have more questions on this.
At the bottom of each message that goes through the mailing list server,
the address for the list archive is printed:
http://pinehurst.sageit.com/listarchive/.
Good Luck,
CSB
-----Original Message-----
From: Robinson, Richard
Sent: Tuesday, March 02, 1999 5:44 PM
To: '[email protected]'
Subject: How do you create and use "common" type classes?
I'm relatively new to forte and I'd like to know how can you handle utility
type classes that you want to use through out your application? Ideally
what I want is a static class with static methods.
Let's say that I have a StringUtil class that has a bunch of methods for
manipulating strings.
My problem is that we have code that runs on the client and code that runs
on the server. Both areas could use the StringUtil class, but from what I
understand, I have to create StringUtil in a plan and then create a server
object of type StringUtil. The server object will eventually get assigned
to a partition. That's not good since I really want the server object to
physically reside at the server end and at the client end. (Actually, I
don't want a server object, I just want to invoke a static method of a
static class).
Any clues on how to solve this problem would be appreciated.
Also, what is the url at Sage-it that has a summary of all emails that have
been posted to [email protected]? Perhaps this question has been
answered previously.
Thanks in advance

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How to wire up and use 256 points at a time on the PXI-2532

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