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Frequently Asked Questions

MVC (Amplitude Normalization)

1. What does "MVC" mean?

2. When should I use the MVC?

3. What are the steps to perform and calculate a Normalized Value?

4. What is the best way to perform a MVC?

5. What are the steps to record the MVC in MyoResearch XP?

6. Which values should I use in MyoResearch XP for the Amplitude Normalization (MVC) setup?

7. What does "MVC stack" mean? How does it save my data?

8. Where do I find the MVC microvolt (uV) value in MRXP?

9. How are the MVC values calculated in MRXP?

10. Why are my % MVC values in MRXP higher than 100%. Isn't the MVC supposed to be the highest value?

11. How do I create and apply the MVC in MyoResearch 98 (versions 2.02, 2.10, 2.11)?

Signal Processing

12. I do not want to signal process all the available channels. How do I signal process only the desired channels in MRXP?

13. The signal processing I applied to my data is incorrect. How do I change it?

14. Which values should I use for Smoothing in MRXP?

15. What does "RMS" mean?

16. I want to use a Butterworth filter. How do I set it up in MyoResearch XP?

17. I need to filter out "movement artifact" (slow baseline shifts). Which settings do I use in MyoResearch XP?

Passwords/Activation Code

18. The software is asking for an Activation Code. What number do I enter?

19. Where do I find the Activation Key?

20. The Activation Code you gave me doesn't work.

Introduction to MyoResearch XP

21. How do I perform a measurement in MRXP Master?

22. How do I perform a measurement in MRXP Application Protocols or Clinical Applications?

23. How do I perform a measurement in MRXP Data Acquisition?

24. I only want to analyze a section of data in the MRXP record. How do I do that?

25. I want to Signal Process or make other changes to my data, but I want to keep a copy of the original data. How do I do that?

26. In MRXP's Onset-Offset Report, how do I determine where to put the markers and which settings to use?

27. I have the electrodes on my muscle, but the signal on the screen does not look like the expected signal. When I am not moving my muscle, the PC screen still shows a contraction.

28. Does MRXP work with Vista?

29. I am using MyoResearch XP on a Windows Vista computer and I keep getting error messages.

Import/Export Data

30. How do I copy files from MyoVideo into MRXP?

31. How do I copy data from MyoResearch 98 (versions 2.02, 2.10, 2.11) to MyoResearch XP?

32. How do I copy MRXP data from one PC to another?

33. How do I copy data in MRXP to a newer version of MRXP?

34. How do I backup data in MyoResearch XP?

35. When do I use "export/import" and when do I use the "copy" function in MyoResearch XP?

36. How do I copy data into MyoResearch XP?

37. How do I copy an Application/Protocol into MyoResearch XP?

38. How do I install the MRXP patch?

Video

39. How do I set up the video in MRXP?

40. When I try to set up the video in MRXP, I get the Package Error "Device not found". How do I solve that problem?

41. What is a "Codec"?

42. Which Codec should I use for my videos?

43. Which Audio Codec do I use?

44. I do not see the Demo videos in MRXP.

45. I do not see the video screen in MRXP when I am recording the data.

46. My video screen in MRXP is black.

47. Can I use a USB digital video camera?

Sensors

48. I have a sensor/device from another company. In the Channel Setup, the sensor/device is not listed. How do I add it?

USB Devices

49. I am getting the error message "Cannot open USB driver. Device can be unplugged or turned off."

50. I am using a MyoTrace 400 and I keep geting the error "USB cable is disconnected" in MyoResearch XP, but my USB cable is connected to the PC Interface and the PC.

51. How do I load the USB driver?

52. I already loaded the USB driver on this PC, why isn't it working?

53. I have a USB A/D converter and it is not working. I don't hear the "ding/dong" when I plug it into the computer.

54. Where is the USB driver on the website?

55. I downloaded the USB driver from the website, but I can't install it.

Active Leads

56. What is the long wire (snap) on channel 1 for? Do I need to put it on the subject?

57. Where should I place the reference/ground lead?

58. I want to put the reference/ground lead on a bony prominence, but the cable is not long enough.

59. A lead is not working properly, but I still want to use that channel. Can I put another 2-snap lead with a different number into that channel?

60. I am getting irregular signals. How do I determine what is wrong?

TeleMyo 2400T

61. Why is there an uneven flow of my data while recording in MRXP?

62. The PCMCIA card you sent with my system does not fit into the slot on my PC.

63. My TeleMyo 2400T G2 is not turning on.

64. My battery charger for my TM2400T G2 is not working.

65. How do I set up the TeleMyo 2400T (G1: models V1 & V2) network on Windows Vista?

TeleMyo 2400R G2

66. On my TeleMyo 2400R G2, I set the switch to USB (or Panel) mode, but it is still not showing the proper mode.

MyoTrace 400

67. The charging light on my MyoTrace 400 is not on even though it is plugged in securely.

68. I charged the MyoTrace 400 battery until its yellow charge indicator was extinguished but the MyoTrace 400 display is not showing 100%

69.

70. I am getting the error "USB cable is disconnected" in MyoResearch XP, but my USB cable is connected to the PC Interface and the PC.

MyoSystem 1400A

71. I am not getting any auxilliary signals from my 1400A.

72. I need to install the USB driver for the MyoSystem 1400A. How do I do that?

Electrodes and Skin Preparation

73. How do I prepare the skin for EMG measurements?

74. I have prepared the skin as recommended in ABC of EMG, but the signals are not accurate enough and my subjects are complaining about skin irritation.