Noise Troubleshooting; Noise - GE LOGIQ Totus Basic Service Manual

Direction 5936427, Rev. 1
Section 7-6

Noise Troubleshooting

Contents in this section
7-6-1
7-6-2
7-6-3
7-6-4
7-6-5
7-6-6
7-6-1

Noise

Ultrasound machines are susceptible to Electromagnetic Interference (EMI) from radio frequencies,
magnetic fields, and transients in the air or wiring. They also generate EMI. Possible EMI sources
should be identified before the unit is installed. Electrical and electronic equipment may produce EMI
unintentionally as the result of a defect. Some of these sources include:
• medical lasers
• scanners
• cauterizing guns
• computers
• monitors
• fans
• gel warmers
• microwave ovens
• light dimmers
• portable phones
The presence of a broadcast station or broadcast van may also cause interference.
When talking to the customer, try to gather as much information as possible about the conditions when
the noise appears.
Table 7-19
The noise is present
All the time
After some time of use
CertaIn times of the day or night
At all locations in the hospital
Only in one room or area
From time to time with no special
pattern of time is observed
7 - 52
GE HealthCare CONFIDENTIAL
Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-52
Noise picked up from the air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-53
Noise received through the external cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-53
Doppler noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-53
Intermittent noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-53
Noise on a board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-54
Noise Conditions
n/a
The amount of time
between initial use and
when the noise begins.
The time of day or night
along with the duration.
n/a
The room or area
n/a
Section 7-6 - Noise Troubleshooting
Determine
7-6-2 "Noise picked up from the air" on page 7-53
7-6-3 "Noise received through the external cables" on page 7-
53.
7-6-2 "Noise picked up from the air" on page
7-6-2 "Noise picked up from the air" on page 7-53
7-6-3 "Noise received through the external cables" on page 7-
53.
7-6-2 "Noise picked up from the air" on page
7-6-2 "Noise picked up from the air" on page 7-53
7-6-3 "Noise received through the external cables" on page 7-
53.
7-6-2 "Noise picked up from the air" on page 7-53
7-6-3 "Noise received through the external cables" on page 7-
53.
LOGIQ Totus Basic Service Manual
If the test fails, ...
7-53.
7-53.
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