TDT RZ2, Manual, Page: 243 / 736

System 3 6-35
PZ5M Medically Isolated NeuroDigitizer
Logical amplifier configurations can be defined using the PZ5M_Control macro
(recommended) (see “PZ5M Software Control” on page 6-36) or the front panel
interface (see “Using the PZ5M Front Panel Display” on page 6-37). If using the
PZ5M_Control macro, the front panel configuration will be overwritten by information
in the macro when the circuit is run.
Reference Modes
The PZ5M supports four referencing modes for each logical amplifier: Local, Shared,
None and Differential. Reference and Ground configurations for each logical amplifier
can be defined using the PZ5M_Control macro or via the touchscreen interface. See
“Pinout Diagrams” on page 6-53, for pinout information.
Local
In Local reference mode, each bank of channels in a logical amplifier uses its own
reference input (pins 36 and 76) as the reference for that bank.
Shared
In Shared mode, the reference pin (pins 36 and 76) of the first bank of the
logical amplifier acts as a reference for all banks in the logical amplifier (pins 38
and 78) serve as ground.
None
In None mode, the references for all banks of a logical amplifier are tied to pins 37,
38, 77, and 78.
Differential
In Differential mode, the inputs in each bank of the logical amplifier are paired; odd
channels serve as recording (+) channels and each even channel is used as an
individual reference (-) channel for the preceding odd channel. In this mode, no
connections should be made to pins 35, 36, 75 and 76.