GE LOGIQ 5 Doppler Noise.

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   Question: I have a GE LOGIQ 5 that when I turn on Pulsed Wave (PW) Doppler with a 10L, there is a great deal of noise - The term I would use is that is sounds like a motor boat sound. Where should I start looking to isolate the problem?

Answer: Here is how I would attack the problem to try to isolate it:

- Try a different probe of the same model number.

- Try a different probe port.
- Try a different probe model number.
- If CW is an available option see if the problem is present in that mode on imaging probes also.
- If the CWD (Pencil) probe port is installed, see if the problem occurs with a pencil probe also.
- Try turning gain all the way down in PW/CW mode to see if the problem is affected.
- Try turning transmit power all the way down in PW/CW mode to see if the problem is affected.
- Ensure the probe is being used at application defaults – no user presets being applied. I have seen a low wall filter (in combination with custom PRF and other settings cause a motor boat artifact).
- Reload both the base and application software.
- Verify the power coming from the wall is within OEM tolerances.
- Verify the power coming from the wall has a good ground and that there is less than 1vpp between ground and neutral.
- Move the machine to a different power source/room that is not on the same circuit.
- Verify all DC (LV & HV) power supplies are within OEM tolerances with less than 1vpp AC ripple.
- Reseat the RLY/LMT/PMT/ATD/CWDOP/RDS/FEC Boards one at a time to see if there is any affect.
- Remove LMT/PMT/ATD/CWDOP/RDS Boards one at a time and power up the unit to see if the problem is affected. 
- Remove the HV Board and power up the unit to see if the problem is affected.

Hope that helps!

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caruso122 Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Admin Group Joined: Apr 09 2009 Location: Noblesville, IN Points: 85	Post Options Post Reply Quote caruso122 Report Post Thanks(0) Quote Reply Topic: GE LOGIQ 5 Doppler Noise. Posted: Mar 22 2011 at 1:02pm
	Question: I have a GE LOGIQ 5 that when I turn on Pulsed Wave (PW) Doppler with a 10L, there is a great deal of noise - The term I would use is that is sounds like a motor boat sound. Where should I start looking to isolate the problem? Answer: Here is how I would attack the problem to try to isolate it: - Try a different probe of the same model number. - Try a different probe port. - Try a different probe model number. - If CW is an available option see if the problem is present in that mode on imaging probes also. - If the CWD (Pencil) probe port is installed, see if the problem occurs with a pencil probe also. - Try turning gain all the way down in PW/CW mode to see if the problem is affected. - Try turning transmit power all the way down in PW/CW mode to see if the problem is affected. - Ensure the probe is being used at application defaults – no user presets being applied. I have seen a low wall filter (in combination with custom PRF and other settings cause a motor boat artifact). - Reload both the base and application software. - Verify the power coming from the wall is within OEM tolerances. - Verify the power coming from the wall has a good ground and that there is less than 1vpp between ground and neutral. - Move the machine to a different power source/room that is not on the same circuit. - Verify all DC (LV & HV) power supplies are within OEM tolerances with less than 1vpp AC ripple. - Reseat the RLY/LMT/PMT/ATD/CWDOP/RDS/FEC Boards one at a time to see if there is any affect. - Remove LMT/PMT/ATD/CWDOP/RDS Boards one at a time and power up the unit to see if the problem is affected. - Remove the HV Board and power up the unit to see if the problem is affected. Hope that helps!
	C&C Medical Solutions, Inc. _____________________ Christopher Turner Phone: 317-219-3616 x103 Fax: 317-770-0560 Yahoo IM: caruso122 Skype IM: cturner122 Email: chris@ccmedicalsolutions.com