RFSA scaling complex I16 data

I've successfully acquired complex I16 data using the niRFSA_FetchIQSingleRecordComplexI16 function but after computing the spectral result my amplitudes are ~15dBm too low. I must be scaling the data incorrectly. I'm assuming that the gain and offset values returned in the wfmInfo structure are applied to the real and imaginary values. I'm also assuming that the gain and offset values take the programmed reference level set with the niRFSAConfigureReferenceLevel into account. The gain scaling values do change when select a differect reference level.
Are these assumptions correct? The gain value seems to be off by a factor of 4 (or so).
I'm using the 5663 RFSA hardware configuration. When I use the RFSA SFP the amplitudes are correct.

Hi Timothy,
To setup a measurement I call the following sequence of functions:
niRFSA_ConfigureReferenceLevel, -20dBm
niRFSA_ConfigureRefClock, OnboardClock, 10e6
niRFSA_ConfigureIQCarrierFrequency, 975e6
niRFSA_ConfigureIQRate, 64e6
niRFSA_ConfigureNumberOfSamples, 131072
niRFSA_Commit
To start the measurement I then call niRFSA_Initiate.
Then niRFSA_CheckAcquisitionStatus is called repeatedly until it indicates
that data is available.
When data is available I call niRFSA_FetchIQSingleRecordComplexI16
to get the int16 complex data.
I then call niRFSA_GetScalingCoefficients to get the scaling coefficients and
find that the gain and offset values are different than those returned in
niRFSA_FetchIQSingleRecordComplexI16. I added this call to niRFSA_GetScalingCoefficients
since the results I was getting with the gain returned by niRFSA_FetchIQSingleRecordComplexI16
wasn't producing the correct result.
I then use the gain and offset values to scale the int16 complex values into real32 complex values.
I'm puzzled as to why the scaling coefficients are different between
niRFSA_GetScalingCoefficients and niRFSA_FetchIQSingleRecordComplexI16.
For this setup the gain value returned by niRFSA_GetScalingCoefficients is 2.88301e-5
and the gain value returned by niRFSA_FetchIQSingleRecordComplexI16 is 4.61151e-6.
When I apply either of these gain values to the data and compute the spectrum my
signal amplitudes are not correct.
Hope this help,
Gary

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Attachments:
Convert Unscaled to Scaled.jpg ‏81 KB

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SVA_Impact Test (DAQmx) demo.seproj ‏307 KB
SVXMPL_Impact Test (DAQmx).vi ‏75 KB

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I am using AI to import anatomical tracing data (paths and symbols). The data coordinates are in millimeters. I create an artboard as follows:
The file import code reads the data and then passes the bounds data to the art routine, CreateDataArt, as minv and maxv. As can be seen (abRect) the bounds of the data are 13 mm wide by 14 mm top to bottom. Two paths are then drawn into the artboard as shown here:
Note that the rulers are in millimeter units and that the art board is nowhere the correct size.
Any clues would be appreciated.
Charlie Knox
AccuStage

Regardless of what ruler unit you're using in Illustrator, the API always* takes points/pixels as its unit. So if you have values in millimeters and you want that to show up as the correct distance, etc., you'll need to multiply it out correctly to points and use that value when talking to the API.
*In CS6, there is a method that lets you tell the API to use whatever the current ruler unit is showing. I haven't tried it though, so I find it safer to just always convert to points. I have couple of simple functions that just check the current ruler unit and do any conversion (if necessary). Then I use those ToRulerUnit() or FromRulerUnit() anywhere I take inputs from the UI (or from an imported file as it sounds like in this case).

Word 2007 complex autofill date feature

I need to write the date in a heading (within the text body) and I need Word 2007 to autofill the consecutive dates into the following
headings in the document.
Example: I want to be able to write "Monday, 2/ 02" and I want Word to autofill "Tuesday, 2/03" and "Wednesday, 2/04" in the following headings within the document.
Any tips?

You could do this with field coding or with a macro. To see how to do it with field coding, check out my Microsoft Word Date Calculation Tutorial, at:
http://windowssecrets.com/forums/showthread.php/154368-Microsoft-Word-Date-Calculation-Tutorial
or:
http://www.gmayor.com/downloads.htm#Third_party
In particular, look at the item titled 'Calculate a Date Sequence'. Do read the document's introductory material.
Note that the calculations don't automatically update - you'll need to force them to (e.g. via Ctrl-A, F9).
Cheers
Paul Edstein
[MS MVP - Word]

RFSA scaling complex I16 data

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