User's Manual

EEG
24-11
FBR1, FBR2
The frequency band ratio trends are a trend plot of the ratio (in percent) of total
power in one frequency band divided by the total power in a second frequency
band.
Frequency band ratio trend parameters (FBR1, FBR 2) require a frequency band
for the numerator and denominator. The frequency range for each band is defined
in the Initial Setup menu.
SIZE
Trend size should be set using the SIZE ↑ or SIZE ↓ keys so that the trend
parameter lies close to the middle of the graph.
NUMERATOR DENOMINATOR
Touch the NUMERATOR/DENOMINATOR key and select NUMERATOR. Touch
the appropriate keys (DELTA, THETA, ALPHA, BETA 1, BETA 2) to select the
frequency band for the numerator. Now touch the DENOMINATOR key, and again
choose an appropriate band for the denominator.
If more than one band is required, first touch the lowest frequency band, then the
highest.
The frequency band setting is displayed above the frequency band keys on the
message line. You will see the following format for the display:
BAND x1-y1/x2-y2
where x1 is the lowest frequency band for the numerator, and y1 is the highest
frequency band for the numerator. The lowest frequency band for the denominator
is x2, and the highest, y2.
Time base
Touch TIME BASE to choose the amount of time the X-axis display represents.
Touch either 5,10, 20, or 40 min to select a trend screen time. The active key will
highlight.
EMG
SIZE
Trend size should be set using the SIZE ↑ or SIZE ↓ keys so that the trend
parameter lies close to the middle of the graph.
FREQUENCY
Select either HI FREQ= or LO FREQ=. Press the FREQ ↑ or FREQ ↓ key until the
desired value appears in the XFREQ= key. Repeat for the other key.
!
• The DSA time base will change to track the trend time base.