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BioSigRZ Tech Notes

BioSigRZ calibration crashes

TN0979

Product: BioSigRZ
Version: < 5.7.1
Date Added: 2016-08-03

Issue

Earlier versions of the SGRZ_Cal_200K.rcx file, used for calibrations in BioSigRZ, would crash the calibration and the program.

Solution

Upgrade to the latest version of BioSigRZ.

SigGen Variables Must be Unique

TN0949

Product: SigGenRP, BioSigRZ
Version: All
Date Added: 2014-11-07

Issue

When you generate multiple segments in the same SigGen signal file (.sig), you can only use each variable once.

Symptoms: If you generate a multi-segment stimulus with duplicate variable names, the output displayed in the SigGen multi-purpose plot (stimulus view) will be flat, not showing any stimulus.

Workaround

If you need a signal with multiple segments that each use an identical variable, you can create them to be identical EXCEPT for the name. Each name can only be used once in a given .sig file.

With unique variable names for each segment, SigGenRP and SigGenRZ will generate the stimuli correctly.

Note

When editing these variables in the future, be sure to edit all variables in the same way.

Setting up the RZ6 for Fish ABR (with a hydrophone)

TN0941

Product: RZ6, BioSigRZ
Version: All
Date Added: 2014-08-25

Issue

When using the RZ6 to collect ABRs from fish, you will generally want lower frequencies and slower presentation rates than commonly found with other animals like rodents. You might also want to record the stimulus with a Hydrophone at the same time you record the ABR. This will require different signal, circuit, and configurations files that are not typically provided with BioSigRZ.

Solution

The files you will need, along with information on how to use them and how to calibrate with a hydrophone, are available in a folder called FishABR inside the BioSigRZ examples zip file available at: BioSigRZExamples.zip.

Calibrated tone output sounds distorted

TN0901

Product: BioSigRZ
Version: < 80
Date Added: 2012-06-26

Issue

On some PCs, the transfer of filter coefficients is interrupted. After applying a TCF calibration file, the output tone is distorted either with higher harmonics or random noise.

Solution

Upgrade to the latest version of BioSigRZ.

In BioSigRZ, ABR signals are sometimes acquired at 200kHz

TN0884

Product: BioSigRZ
Version: All
Date Added: 2010-10-22

Issue

If you make changes to the Stimulus parameters prior to recording, acquisition from the preamp will occur at 200kHz instead of 25kHz, resulting in more high frequency noise in the recordings. To see if this is happening, open the saved waveform from the history plot. If the frequency range goes to 100kHz then the data was recorded at 200kHz.

Workaround

If you experience this behavior, open Setup > Acquisition and click OK before you begin your recording.

BioSigRZ filters not working correctly - high frequency noise in ABR data

TN0883

Product: BioSigRZ
Version: 5.0
Date Added: 2010-10-22

Issue

In version 5.0, all acquisition filter settings are erroneously multiplied by 8x, so a 3kHz low-pass filter is actually at 24kHz. This will result in more high frequency noise in the recordings. Also, thresholds will be higher than normal because the high-pass filter is higher than it should be and is filtering out some of the ABR signal. ABR acquisition occurs at 200 kHz instead of 25kHz.

Solution

Upgrade to the latest version of BioSigRZ and TDT Drivers. This issue was resolved in BioSigRZ version 5.1.