TDT RZ2, Manual

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6-46 System 3
PZ5M Medically Isolated NeuroDigitizer
A limited set of channels are visible at any one time. Swipe vertically on the
touchscreen to scroll the visible channels.
Settings include:
Target
Select the target impedance from a drop down list (1 KW-
100 K). This is used to color the impedance value text
during/after probing. Impedance values above the target are
colored red, values <75% below the target are green and
all other values are yellow.
Freq. Set the probe signal frequency from a drop down list. The
frequency is adjustable from 35Hz, 70Hz, 140Hz, 280Hz,
560Hz, 1120Hz, and 2240Hz.
Probing Select the set of connections to measure. The available
options in this list change depending on the logical amp
referencing mode. See “Probing Options” below.
Sort Button Toggle button that displays the channels with the largest
variation from the target impedance at the top of the screen.
Auto Button Toggle button to cycle through each probing option every
second.
Next Button Select to advance to the next probing option set.
Done Button
Return to Main Configuration screen.
Probing Options
The referencing mode of the currently selected logical amplifier determines the
available Probing options.
Differential Reference Mode
If the reference mode is Differential, the Probing options are
Inp(+)
for the positive
input channels and
Inp(-)
for the differential channels. This is the default reference
mode for the EMG amp type.
Local Reference Mode
If the reference mode is Local, the options are
Input
for all the input channels,
Ref
to test the reference impedance to ground, or
AltRef
to test the alternative reference