Magnacoustics Genesis ULTRA Installation And Operation Manual - page 14

Magnacoustics Inc™ © 3/2010 rev – j                                                                   14 | 

Genesis ULTRA Installation and Connections

 - continued

36:  Press the green Power Button on the TCU a self-test will complete and the system should 

power up in Tuner mode.  (It may be necessary to adjust the FM antenna to get better 

reception.  Please keep in mind that if the MRI is located in the basement or if most of the 

transmitting Radio stations are separated by the Scan Room RF Shielding, some form of 

auxiliary or external antenna might be required.

37:  After making sure the Stereo is playing ok (with Tuner, iPod or CD selected).  Depress the 

Green 

VOL NORM button and go into the Scan Room to ensure there is music playing 

from the Headsets.  (If you have help depress the Green 

Mic button speak into the 

supplied Mic (make sure the Mic mute switch is off) to ensure intercom operation. 

Auto Gain Calibration Procedure 

38:  In order to calibrate the 

Microprocessor for AUTO GAIN Function it will be necessary to 

program the Ambient and Full Scan SPL levels, the please follow this procedure;  

a.  Depress the Blue 

PROG MODE button once. 

b. Depress  the 

MUSIC VOL- buttonto toggle down till 11. Ambient MIC Set is highlighted. 

c. Depress  the 

INPUT/ENTER button once and then again allowing the Auto Gain Mic to 

capture the SPL in the room with the scanner idle.   

d. Depress  the 

MUSIC VOL- once to highlight 12. SCAN MIC Level Set depress the 

INPUT/ENTER once. 

e.  Set up a Phantom and start the Scanner for and average scan (Full Scan Level). 

f.    Depress the 

INPUT/ENTER one more time to capture the SPL in the room with the 

scanner active. 

g.  Depress the Blue 

PROG MODE once (which will store the two extremes) and let the 

Microprocessor calculate how much Auto Gain in necessary. 

CAUTION:  Please do not connect any external Antenna or Audio input to the stereo without the 

proper isolation.  We use the Scan Room Shielding as our ground reference. Any auxiliary 

connection to the stereo might not have the same ground potential causing a 60 cycle hum from 

the speakers or patient headset.  This difference in ground potential my also cause system 

damage. 

1.  Radio Shack Ground Loop Isolator Catalog #: 270-054 with the proper phono to 3.5mm 

stereo adapter Radio Shack Catalog #: 274-883 and xx adapter or equivalent must be used.   

2.  A 75 to 300 ohm adapter in series with the any external antenna source must be used.